New: mac80211 stack from the wireless-dev tree

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7692 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/mac80211/src/wireless/Kconfig

@@ -0,0 +1,31 @@
+config CFG80211
+        tristate "Improved wireless configuration API"
+
+config NL80211
+	bool "nl80211 new netlink interface support"
+	depends CFG80211
+	default y
+	---help---
+         This option turns on the new netlink interface
+         (nl80211) support in cfg80211.
+
+         If =n, drivers using mac80211 will be configured via
+         wireless extension support provided by that subsystem.
+
+         If unsure, say Y.
+
+config WIRELESS_EXT
+	bool "Wireless extensions"
+	default n
+	---help---
+	  This option enables the legacy wireless extensions
+	  (wireless network interface configuration via ioctls.)
+
+	  Wireless extensions will be replaced by cfg80211 and
+	  will be required only by legacy drivers that implement
+	  wireless extension handlers. This option does not
+	  affect the wireless-extension backward compatibility
+	  code in cfg80211.
+
+	  Say N (if you can) unless you know you need wireless
+	  extensions for external modules.

package/mac80211/src/wireless/Makefile

@@ -0,0 +1,5 @@
+obj-$(CONFIG_WIRELESS_EXT) += wext.o
+obj-$(CONFIG_CFG80211) += cfg80211.o
+
+cfg80211-y += core.o sysfs.o
+cfg80211-$(CONFIG_NL80211) += nl80211.o

package/mac80211/src/wireless/core.c

@@ -0,0 +1,367 @@
+/*
+ * This is the linux wireless configuration interface.
+ *
+ * Copyright 2006, 2007		Johannes Berg <johannes@sipsolutions.net>
+ */
+
+#include <linux/if.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/list.h>
+#include <linux/nl80211.h>
+#include <linux/debugfs.h>
+#include <linux/notifier.h>
+#include <linux/device.h>
+#include <net/genetlink.h>
+#include <net/cfg80211.h>
+#include <net/wireless.h>
+#include "nl80211.h"
+#include "core.h"
+#include "sysfs.h"
+
+/* name for sysfs, %d is appended */
+#define PHY_NAME "phy"
+
+MODULE_AUTHOR("Johannes Berg");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("wireless configuration support");
+
+/* RCU might be appropriate here since we usually
+ * only read the list, and that can happen quite
+ * often because we need to do it for each command */
+LIST_HEAD(cfg80211_drv_list);
+DEFINE_MUTEX(cfg80211_drv_mutex);
+static int wiphy_counter;
+
+/* for debugfs */
+static struct dentry *ieee80211_debugfs_dir;
+
+/* requires cfg80211_drv_mutex to be held! */
+static struct cfg80211_registered_device *cfg80211_drv_by_wiphy(int wiphy)
+{
+	struct cfg80211_registered_device *result = NULL, *drv;
+
+	list_for_each_entry(drv, &cfg80211_drv_list, list) {
+		if (drv->idx == wiphy) {
+			result = drv;
+			break;
+		}
+	}
+
+	return result;
+}
+
+/* requires cfg80211_drv_mutex to be held! */
+static struct cfg80211_registered_device *
+__cfg80211_drv_from_info(struct genl_info *info)
+{
+	int ifindex;
+	struct cfg80211_registered_device *bywiphy = NULL, *byifidx = NULL;
+	struct net_device *dev;
+	int err = -EINVAL;
+
+	if (info->attrs[NL80211_ATTR_WIPHY]) {
+		bywiphy = cfg80211_drv_by_wiphy(
+				nla_get_u32(info->attrs[NL80211_ATTR_WIPHY]));
+		err = -ENODEV;
+	}
+
+	if (info->attrs[NL80211_ATTR_IFINDEX]) {
+		ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
+		dev = dev_get_by_index(ifindex);
+		if (dev) {
+			if (dev->ieee80211_ptr)
+				byifidx =
+					wiphy_to_dev(dev->ieee80211_ptr->wiphy);
+			dev_put(dev);
+		}
+		err = -ENODEV;
+	}
+
+	if (bywiphy && byifidx) {
+		if (bywiphy != byifidx)
+			return ERR_PTR(-EINVAL);
+		else
+			return bywiphy; /* == byifidx */
+	}
+	if (bywiphy)
+		return bywiphy;
+
+	if (byifidx)
+		return byifidx;
+
+	return ERR_PTR(err);
+}
+
+struct cfg80211_registered_device *
+cfg80211_get_dev_from_info(struct genl_info *info)
+{
+	struct cfg80211_registered_device *drv;
+
+	mutex_lock(&cfg80211_drv_mutex);
+	drv = __cfg80211_drv_from_info(info);
+
+	/* if it is not an error we grab the lock on
+	 * it to assure it won't be going away while
+	 * we operate on it */
+	if (!IS_ERR(drv))
+		mutex_lock(&drv->mtx);
+
+	mutex_unlock(&cfg80211_drv_mutex);
+
+	return drv;
+}
+
+struct cfg80211_registered_device *
+cfg80211_get_dev_from_ifindex(int ifindex)
+{
+	struct cfg80211_registered_device *drv = ERR_PTR(-ENODEV);
+	struct net_device *dev;
+
+	mutex_lock(&cfg80211_drv_mutex);
+	dev = dev_get_by_index(ifindex);
+	if (!dev)
+		goto out;
+	if (dev->ieee80211_ptr) {
+		drv = wiphy_to_dev(dev->ieee80211_ptr->wiphy);
+		mutex_lock(&drv->mtx);
+	} else
+		drv = ERR_PTR(-ENODEV);
+	dev_put(dev);
+ out:
+	mutex_unlock(&cfg80211_drv_mutex);
+	return drv;
+}
+
+void cfg80211_put_dev(struct cfg80211_registered_device *drv)
+{
+	BUG_ON(IS_ERR(drv));
+	mutex_unlock(&drv->mtx);
+}
+
+int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
+			char *newname)
+{
+	int idx, taken = -1, result, digits;
+
+	/* prohibit calling the thing phy%d when %d is not its number */
+	sscanf(newname, PHY_NAME "%d%n", &idx, &taken);
+	if (taken == strlen(newname) && idx != rdev->idx) {
+		/* count number of places needed to print idx */
+		digits = 1;
+		while (idx /= 10)
+			digits++;
+		/*
+		 * deny the name if it is phy<idx> where <idx> is printed
+		 * without leading zeroes. taken == strlen(newname) here
+		 */
+		if (taken == strlen(PHY_NAME) + digits)
+			return -EINVAL;
+	}
+
+	/* this will check for collisions */
+	result = device_rename(&rdev->wiphy.dev, newname);
+	if (!result)
+		return result;
+
+	/* TODO: do debugfs rename! */
+
+	nl80211_notify_dev_rename(rdev);
+
+	return 0;
+}
+
+/* exported functions */
+
+struct wiphy *wiphy_new(struct cfg80211_ops *ops, int sizeof_priv)
+{
+	struct cfg80211_registered_device *drv;
+	int alloc_size;
+
+	alloc_size = sizeof(*drv) + sizeof_priv;
+
+	drv = kzalloc(alloc_size, GFP_KERNEL);
+	if (!drv)
+		return NULL;
+
+	drv->ops = ops;
+
+	mutex_lock(&cfg80211_drv_mutex);
+
+	drv->idx = wiphy_counter;
+
+	/* now increase counter for the next device unless
+	 * it has wrapped previously */
+	if (wiphy_counter >= 0)
+		wiphy_counter++;
+
+	mutex_unlock(&cfg80211_drv_mutex);
+
+	if (unlikely(drv->idx < 0)) {
+		/* ugh, wrapped! */
+		kfree(drv);
+		return NULL;
+	}
+
+	/* give it a proper name */
+	snprintf(drv->wiphy.dev.bus_id, BUS_ID_SIZE,
+		 PHY_NAME "%d", drv->idx);
+
+	mutex_init(&drv->mtx);
+	mutex_init(&drv->devlist_mtx);
+	INIT_LIST_HEAD(&drv->netdev_list);
+
+	device_initialize(&drv->wiphy.dev);
+	drv->wiphy.dev.class = &ieee80211_class;
+	drv->wiphy.dev.platform_data = drv;
+
+	return &drv->wiphy;
+}
+EXPORT_SYMBOL(wiphy_new);
+
+int wiphy_register(struct wiphy *wiphy)
+{
+	struct cfg80211_registered_device *drv = wiphy_to_dev(wiphy);
+	int res;
+
+	mutex_lock(&cfg80211_drv_mutex);
+
+	res = device_add(&drv->wiphy.dev);
+	if (res)
+		goto out_unlock;
+
+	list_add(&drv->list, &cfg80211_drv_list);
+
+	/* add to debugfs */
+	drv->wiphy.debugfsdir =
+		debugfs_create_dir(wiphy_name(&drv->wiphy),
+				   ieee80211_debugfs_dir);
+
+	res = 0;
+out_unlock:
+	mutex_unlock(&cfg80211_drv_mutex);
+	return res;
+}
+EXPORT_SYMBOL(wiphy_register);
+
+void wiphy_unregister(struct wiphy *wiphy)
+{
+	struct cfg80211_registered_device *drv = wiphy_to_dev(wiphy);
+
+	/* protect the device list */
+	mutex_lock(&cfg80211_drv_mutex);
+
+	BUG_ON(!list_empty(&drv->netdev_list));
+
+	/*
+	 * Try to grab drv->mtx. If a command is still in progress,
+	 * hopefully the driver will refuse it since it's tearing
+	 * down the device already. We wait for this command to complete
+	 * before unlinking the item from the list.
+	 * Note: as codified by the BUG_ON above we cannot get here if
+	 * a virtual interface is still associated. Hence, we can only
+	 * get to lock contention here if userspace issues a command
+	 * that identified the hardware by wiphy index.
+	 */
+	mutex_lock(&drv->mtx);
+	/* unlock again before freeing */
+	mutex_unlock(&drv->mtx);
+
+	list_del(&drv->list);
+	device_del(&drv->wiphy.dev);
+	debugfs_remove(drv->wiphy.debugfsdir);
+
+	mutex_unlock(&cfg80211_drv_mutex);
+}
+EXPORT_SYMBOL(wiphy_unregister);
+
+void cfg80211_dev_free(struct cfg80211_registered_device *drv)
+{
+	mutex_destroy(&drv->mtx);
+	mutex_destroy(&drv->devlist_mtx);
+	kfree(drv);
+}
+
+void wiphy_free(struct wiphy *wiphy)
+{
+	put_device(&wiphy->dev);
+}
+EXPORT_SYMBOL(wiphy_free);
+
+static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
+					 unsigned long state,
+					 void *ndev)
+{
+	struct net_device *dev = ndev;
+	struct cfg80211_registered_device *rdev;
+
+	if (!dev->ieee80211_ptr)
+		return 0;
+
+	rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy);
+
+	switch (state) {
+	case NETDEV_REGISTER:
+		mutex_lock(&rdev->devlist_mtx);
+		list_add(&dev->ieee80211_ptr->list, &rdev->netdev_list);
+		if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
+				      "phy80211")) {
+			printk(KERN_ERR "wireless: failed to add phy80211 "
+				"symlink to netdev!\n");
+		}
+		dev->ieee80211_ptr->netdev = dev;
+		mutex_unlock(&rdev->devlist_mtx);
+		break;
+	case NETDEV_UNREGISTER:
+		mutex_lock(&rdev->devlist_mtx);
+		if (!list_empty(&dev->ieee80211_ptr->list)) {
+			sysfs_remove_link(&dev->dev.kobj, "phy80211");
+			list_del_init(&dev->ieee80211_ptr->list);
+		}
+		mutex_unlock(&rdev->devlist_mtx);
+		break;
+	}
+
+	return 0;
+}
+
+static struct notifier_block cfg80211_netdev_notifier = {
+	.notifier_call = cfg80211_netdev_notifier_call,
+};
+
+static int cfg80211_init(void)
+{
+	int err = wiphy_sysfs_init();
+	if (err)
+		goto out_fail_sysfs;
+
+	err = register_netdevice_notifier(&cfg80211_netdev_notifier);
+	if (err)
+		goto out_fail_notifier;
+
+	err = nl80211_init();
+	if (err)
+		goto out_fail_nl80211;
+
+	ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
+
+	return 0;
+
+out_fail_nl80211:
+	unregister_netdevice_notifier(&cfg80211_netdev_notifier);
+out_fail_notifier:
+	wiphy_sysfs_exit();
+out_fail_sysfs:
+	return err;
+}
+module_init(cfg80211_init);
+
+static void cfg80211_exit(void)
+{
+	debugfs_remove(ieee80211_debugfs_dir);
+	nl80211_exit();
+	unregister_netdevice_notifier(&cfg80211_netdev_notifier);
+	wiphy_sysfs_exit();
+}
+module_exit(cfg80211_exit);

package/mac80211/src/wireless/core.h

@@ -0,0 +1,81 @@
+/*
+ * Wireless configuration interface internals.
+ *
+ * Copyright 2006, 2007 Johannes Berg <johannes@sipsolutions.net>
+ */
+#ifndef __NET_WIRELESS_CORE_H
+#define __NET_WIRELESS_CORE_H
+#include <linux/mutex.h>
+#include <linux/list.h>
+#include <linux/netdevice.h>
+#include <net/genetlink.h>
+#include <net/wireless.h>
+#include <net/cfg80211.h>
+
+struct cfg80211_registered_device {
+	struct cfg80211_ops *ops;
+	struct list_head list;
+	/* we hold this mutex during any call so that
+	 * we cannot do multiple calls at once, and also
+	 * to avoid the deregister call to proceed while
+	 * any call is in progress */
+	struct mutex mtx;
+
+	/* wiphy index, internal only */
+	int idx;
+
+	/* associate netdev list */
+	struct mutex devlist_mtx;
+	struct list_head netdev_list;
+
+	/* must be last because of the way we do wiphy_priv(),
+	 * and it should at least be aligned to NETDEV_ALIGN */
+	struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN)));
+};
+
+static inline
+struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
+{
+	BUG_ON(!wiphy);
+	return container_of(wiphy, struct cfg80211_registered_device, wiphy);
+}
+
+extern struct mutex cfg80211_drv_mutex;
+extern struct list_head cfg80211_drv_list;
+
+/*
+ * This function returns a pointer to the driver
+ * that the genl_info item that is passed refers to.
+ * If successful, it returns non-NULL and also locks
+ * the driver's mutex!
+ *
+ * This means that you need to call cfg80211_put_dev()
+ * before being allowed to acquire &cfg80211_drv_mutex!
+ *
+ * This is necessary because we need to lock the global
+ * mutex to get an item off the list safely, and then
+ * we lock the drv mutex so it doesn't go away under us.
+ *
+ * We don't want to keep cfg80211_drv_mutex locked
+ * for all the time in order to allow requests on
+ * other interfaces to go through at the same time.
+ *
+ * The result of this can be a PTR_ERR and hence must
+ * be checked with IS_ERR() for errors.
+ */
+extern struct cfg80211_registered_device *
+cfg80211_get_dev_from_info(struct genl_info *info);
+
+/* identical to cfg80211_get_dev_from_info but only operate on ifindex */
+extern struct cfg80211_registered_device *
+cfg80211_get_dev_from_ifindex(int ifindex);
+
+extern void cfg80211_put_dev(struct cfg80211_registered_device *drv);
+
+/* free object */
+extern void cfg80211_dev_free(struct cfg80211_registered_device *drv);
+
+extern int cfg80211_dev_rename(struct cfg80211_registered_device *drv,
+			       char *newname);
+
+#endif /* __NET_WIRELESS_CORE_H */

package/mac80211/src/wireless/nl80211.c

@@ -0,0 +1,994 @@
+/*
+ * This is the new netlink-based wireless configuration interface.
+ *
+ * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
+ */
+
+#include <linux/if.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/list.h>
+#include <linux/if_ether.h>
+#include <linux/ieee80211.h>
+#include <linux/nl80211.h>
+#include <linux/rtnetlink.h>
+#include <net/genetlink.h>
+#include <net/cfg80211.h>
+#include "core.h"
+#include "nl80211.h"
+
+/* the netlink family */
+static struct genl_family nl80211_fam = {
+	.id = GENL_ID_GENERATE,	/* don't bother with a hardcoded ID */
+	.name = "nl80211",	/* have users key off the name instead */
+	.hdrsize = 0,		/* no private header */
+	.version = 1,		/* no particular meaning now */
+	.maxattr = NL80211_ATTR_MAX,
+};
+
+/* internal helper: validate an information element attribute */
+static int check_information_element(struct nlattr *nla)
+{
+	int len = nla_len(nla);
+	u8 *data = nla_data(nla);
+	int elementlen;
+
+	while (len >= 2) {
+		/* 1 byte ID, 1 byte len, `len' bytes data */
+		elementlen = *(data+1) + 2;
+		data += elementlen;
+		len -= elementlen;
+	}
+	return len ? -EINVAL : 0;
+}
+
+/* internal helper: get drv and dev */
+static int get_drv_dev_by_info_ifindex(struct genl_info *info,
+				       struct cfg80211_registered_device **drv,
+				       struct net_device **dev)
+{
+	int ifindex;
+
+	if (!info->attrs[NL80211_ATTR_IFINDEX])
+		return -EINVAL;
+
+	ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
+	*dev = dev_get_by_index(ifindex);
+	if (!dev)
+		return -ENODEV;
+
+	*drv = cfg80211_get_dev_from_ifindex(ifindex);
+	if (IS_ERR(*drv)) {
+		dev_put(*dev);
+		return PTR_ERR(*drv);
+	}
+
+	return 0;
+}
+
+/* policy for the attributes */
+static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
+	[NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
+	[NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
+	[NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
+	[NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
+				      .len = BUS_ID_SIZE-1 },
+	[NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
+	[NL80211_ATTR_BSSID] = { .len = ETH_ALEN },
+	[NL80211_ATTR_SSID] = { .type = NLA_BINARY,
+				.len = IEEE80211_MAX_SSID_LEN },
+	[NL80211_ATTR_CHANNEL] = { .type = NLA_U32 },
+	[NL80211_ATTR_PHYMODE] = { .type = NLA_U32 },
+	[NL80211_ATTR_CHANNEL_LIST] = { .type = NLA_NESTED },
+	[NL80211_ATTR_BSS_LIST] = { .type = NLA_NESTED },
+	[NL80211_ATTR_BSSTYPE] = { .type = NLA_U32 },
+	[NL80211_ATTR_BEACON_PERIOD] = { .type = NLA_U32 },
+	[NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
+	[NL80211_ATTR_TIMESTAMP] = { .type = NLA_U64 },
+	[NL80211_ATTR_IE] = { .type = NLA_BINARY, .len = NL80211_MAX_IE_LEN },
+	[NL80211_ATTR_AUTH_ALGORITHM] = { .type = NLA_U32 },
+	[NL80211_ATTR_TIMEOUT_TU] = { .type = NLA_U32 },
+	[NL80211_ATTR_REASON_CODE] = { .type = NLA_U32 },
+	[NL80211_ATTR_ASSOCIATION_ID] = { .type = NLA_U16 },
+	[NL80211_ATTR_DEAUTHENTICATED] = { .type = NLA_FLAG },
+	[NL80211_ATTR_RX_SENSITIVITY] = { .type = NLA_U32 },
+	[NL80211_ATTR_TRANSMIT_POWER] = { .type = NLA_U32 },
+	[NL80211_ATTR_FRAG_THRESHOLD] = { .type = NLA_U32 },
+	[NL80211_ATTR_FLAG_SCAN_ACTIVE] = { .type = NLA_FLAG },
+	[NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY },
+	[NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY },
+	[NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
+				    .len = WLAN_MAX_KEY_LEN },
+	[NL80211_ATTR_KEY_ID] = { .type = NLA_U32 },
+	[NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
+	[NL80211_ATTR_MAC] = { .len = ETH_ALEN },
+	[NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
+};
+
+/* netlink command implementations */
+
+#define CHECK_CMD(ptr, cmd)				\
+	if (drv->ops->ptr)				\
+		NLA_PUT_FLAG(msg, NL80211_CMD_##cmd);
+
+static int nl80211_get_cmdlist(struct sk_buff *skb, struct genl_info *info)
+{
+	struct cfg80211_registered_device *drv;
+	struct sk_buff *msg;
+	void *hdr;
+	int err;
+	struct nlattr *start;
+
+	drv = cfg80211_get_dev_from_info(info);
+	if (IS_ERR(drv))
+		return PTR_ERR(drv);
+
+	hdr = nl80211msg_new(&msg, info->snd_pid, info->snd_seq, 0,
+			     NL80211_CMD_NEW_CMDLIST);
+	if (IS_ERR(hdr)) {
+		err = PTR_ERR(hdr);
+		goto put_drv;
+	}
+
+	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, drv->idx);
+
+	start = nla_nest_start(msg, NL80211_ATTR_CMDS);
+	if (!start)
+		goto nla_put_failure;
+
+	/* unconditionally allow some common commands we handle centrally
+	 * or where we require the implementation */
+	NLA_PUT_FLAG(msg, NL80211_CMD_GET_CMDLIST);
+	NLA_PUT_FLAG(msg, NL80211_CMD_GET_WIPHYS);
+	NLA_PUT_FLAG(msg, NL80211_CMD_GET_INTERFACES);
+	NLA_PUT_FLAG(msg, NL80211_CMD_RENAME_WIPHY);
+
+	CHECK_CMD(add_virtual_intf, ADD_VIRTUAL_INTERFACE);
+	CHECK_CMD(del_virtual_intf, DEL_VIRTUAL_INTERFACE);
+	CHECK_CMD(associate, ASSOCIATE);
+	CHECK_CMD(disassociate, DISASSOCIATE);
+	CHECK_CMD(deauth, DEAUTH);
+	CHECK_CMD(initiate_scan, INITIATE_SCAN);
+	CHECK_CMD(get_association, GET_ASSOCIATION);
+	CHECK_CMD(get_auth_list, GET_AUTH_LIST);
+	CHECK_CMD(add_key, ADD_KEY);
+	CHECK_CMD(del_key, DEL_KEY);
+
+	nla_nest_end(msg, start);
+
+	genlmsg_end(msg, hdr);
+
+	err = genlmsg_unicast(msg, info->snd_pid);
+	goto put_drv;
+
+ nla_put_failure:
+	err = -ENOBUFS;
+	nlmsg_free(msg);
+ put_drv:
+	cfg80211_put_dev(drv);
+	return err;
+}
+#undef CHECK_CMD
+
+static int nl80211_get_wiphys(struct sk_buff *skb, struct genl_info *info)
+{
+	struct sk_buff *msg;
+	void *hdr;
+	struct nlattr *start, *indexstart;
+	struct cfg80211_registered_device *drv;
+	int idx = 1;
+
+	hdr = nl80211msg_new(&msg, info->snd_pid, info->snd_seq, 0,
+			     NL80211_CMD_NEW_WIPHYS);
+	if (IS_ERR(hdr))
+		return PTR_ERR(hdr);
+
+	start = nla_nest_start(msg, NL80211_ATTR_WIPHY_LIST);
+	if (!start)
+		goto nla_outer_nest_failure;
+
+	mutex_lock(&cfg80211_drv_mutex);
+	list_for_each_entry(drv, &cfg80211_drv_list, list) {
+		indexstart = nla_nest_start(msg, idx++);
+		if (!indexstart)
+			goto nla_put_failure;
+		NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, drv->idx);
+		nla_nest_end(msg, indexstart);
+	}
+	mutex_unlock(&cfg80211_drv_mutex);
+
+	nla_nest_end(msg, start);
+
+	genlmsg_end(msg, hdr);
+
+	return genlmsg_unicast(msg, info->snd_pid);
+
+ nla_put_failure:
+	mutex_unlock(&cfg80211_drv_mutex);
+ nla_outer_nest_failure:
+	nlmsg_free(msg);
+	return -ENOBUFS;
+}
+
+static int addifidx(struct net_device *dev, struct sk_buff *skb, int *idx)
+{
+	int err = -ENOBUFS;
+	struct nlattr *start;
+
+	dev_hold(dev);
+
+	start = nla_nest_start(skb, *idx++);
+	if (!start)
+		goto nla_put_failure;
+
+	NLA_PUT_U32(skb, NL80211_ATTR_IFINDEX, dev->ifindex);
+	NLA_PUT_STRING(skb, NL80211_ATTR_IFNAME, dev->name);
+
+	nla_nest_end(skb, start);
+	err = 0;
+
+ nla_put_failure:
+	dev_put(dev);
+	return err;
+}
+
+static int nl80211_get_intfs(struct sk_buff *skb, struct genl_info *info)
+{
+	struct cfg80211_registered_device *drv;
+	struct sk_buff *msg;
+	void *hdr;
+	int err, array_idx;
+	struct nlattr *start;
+	struct wireless_dev *wdev;
+
+	drv = cfg80211_get_dev_from_info(info);
+	if (IS_ERR(drv))
+		return PTR_ERR(drv);
+
+	hdr = nl80211msg_new(&msg, info->snd_pid, info->snd_seq, 0,
+			     NL80211_CMD_NEW_INTERFACES);
+	if (IS_ERR(hdr)) {
+		err = PTR_ERR(hdr);
+		goto put_drv;
+	}
+
+	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, drv->idx);
+
+	start = nla_nest_start(msg, NL80211_ATTR_INTERFACE_LIST);
+	if (!start) {
+		err = -ENOBUFS;
+		goto msg_free;
+	}
+
+	array_idx = 1;
+	err = 0;
+	mutex_lock(&drv->devlist_mtx);
+	list_for_each_entry(wdev, &drv->netdev_list, list) {
+		err = addifidx(wdev->netdev, msg, &array_idx);
+		if (err)
+			break;
+	}
+	mutex_unlock(&drv->devlist_mtx);
+	if (err)
+		goto msg_free;
+
+	nla_nest_end(msg, start);
+
+	genlmsg_end(msg, hdr);
+
+	err = genlmsg_unicast(msg, info->snd_pid);
+	goto put_drv;
+
+ nla_put_failure:
+	err = -ENOBUFS;
+ msg_free:
+	nlmsg_free(msg);
+ put_drv:
+	cfg80211_put_dev(drv);
+	return err;
+}
+
+static int nl80211_add_virt_intf(struct sk_buff *skb, struct genl_info *info)
+{
+	struct cfg80211_registered_device *drv;
+	int err;
+	unsigned int type = NL80211_IFTYPE_UNSPECIFIED;
+
+	if (!info->attrs[NL80211_ATTR_IFNAME])
+		return -EINVAL;
+
+	if (info->attrs[NL80211_ATTR_IFTYPE]) {
+		type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
+		if (type > NL80211_IFTYPE_MAX)
+			return -EINVAL;
+	}
+
+	drv = cfg80211_get_dev_from_info(info);
+	if (IS_ERR(drv))
+		return PTR_ERR(drv);
+
+	if (!drv->ops->add_virtual_intf) {
+		err = -EOPNOTSUPP;
+		goto unlock;
+	}
+
+	rtnl_lock();
+	err = drv->ops->add_virtual_intf(&drv->wiphy,
+		nla_data(info->attrs[NL80211_ATTR_IFNAME]), type);
+	rtnl_unlock();
+
+ unlock:
+	cfg80211_put_dev(drv);
+	return err;
+}
+
+static int nl80211_del_virt_intf(struct sk_buff *skb, struct genl_info *info)
+{
+	struct cfg80211_registered_device *drv;
+	int ifindex, err;
+	struct net_device *dev;
+
+	err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
+	if (err)
+		return err;
+	ifindex = dev->ifindex;
+	dev_put(dev);
+
+	if (!drv->ops->del_virtual_intf) {
+		err = -EOPNOTSUPP;
+		goto out;
+	}
+
+	rtnl_lock();
+	err = drv->ops->del_virtual_intf(&drv->wiphy, ifindex);
+	rtnl_unlock();
+
+ out:
+	cfg80211_put_dev(drv);
+	return err;
+}
+
+static int nl80211_change_virt_intf(struct sk_buff *skb, struct genl_info *info)
+{
+	struct cfg80211_registered_device *drv;
+	int err, ifindex;
+	unsigned int type;
+	struct net_device *dev;
+
+	if (info->attrs[NL80211_ATTR_IFTYPE]) {
+		type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
+		if (type > NL80211_IFTYPE_MAX)
+			return -EINVAL;
+	} else
+		return -EINVAL;
+
+	err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
+	if (err)
+		return err;
+	ifindex = dev->ifindex;
+	dev_put(dev);
+
+	if (!drv->ops->change_virtual_intf) {
+		err = -EOPNOTSUPP;
+		goto unlock;
+	}
+
+	rtnl_lock();
+	err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex, type);
+	rtnl_unlock();
+
+ unlock:
+	cfg80211_put_dev(drv);
+	return err;
+}
+
+static int nl80211_get_association(struct sk_buff *skb, struct genl_info *info)
+{
+	struct cfg80211_registered_device *drv;
+	int err;
+	struct net_device *dev;
+	struct sk_buff *msg;
+	void *hdr;
+	u8 bssid[ETH_ALEN];
+
+	err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
+	if (err)
+		return err;
+
+	if (!drv->ops->get_association) {
+		err = -EOPNOTSUPP;
+		goto out_put_drv;
+	}
+
+	rtnl_lock();
+	err = drv->ops->get_association(&drv->wiphy, dev, bssid);
+	rtnl_unlock();
+	if (err < 0)
+		goto out_put_drv;
+
+	hdr = nl80211msg_new(&msg, info->snd_pid, info->snd_seq, 0,
+			     NL80211_CMD_ASSOCIATION_CHANGED);
+
+	if (IS_ERR(hdr)) {
+		err = PTR_ERR(hdr);
+		goto out_put_drv;
+	}
+
+	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
+	if (err == 1)
+		NLA_PUT(msg, NL80211_ATTR_BSSID, ETH_ALEN, bssid);
+
+	genlmsg_end(msg, hdr);
+	err = genlmsg_unicast(msg, info->snd_pid);
+	goto out_put_drv;
+
+ nla_put_failure:
+	err = -ENOBUFS;
+	nlmsg_free(msg);
+ out_put_drv:
+	cfg80211_put_dev(drv);
+	dev_put(dev);
+	return err;
+}
+
+static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
+{
+	struct cfg80211_registered_device *drv;
+	int err;
+	struct net_device *dev;
+	struct association_params assoc_params;
+
+	memset(&assoc_params, 0, sizeof(assoc_params));
+
+	err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
+	if (err)
+		return err;
+
+	if (!drv->ops->associate) {
+		err = -EOPNOTSUPP;
+		goto out;
+	}
+
+	if (!info->attrs[NL80211_ATTR_SSID])
+		return -EINVAL;
+
+	assoc_params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
+	assoc_params.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
+
+	if (info->attrs[NL80211_ATTR_BSSID])
+		assoc_params.bssid = nla_data(info->attrs[NL80211_ATTR_BSSID]);
+
+	if (info->attrs[NL80211_ATTR_IE]) {
+		err = check_information_element(info->attrs[NL80211_ATTR_IE]);
+		if (err)
+			goto out;
+		assoc_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
+		assoc_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
+	}
+
+	if (info->attrs[NL80211_ATTR_TIMEOUT_TU]) {
+		assoc_params.timeout =
+			nla_get_u32(info->attrs[NL80211_ATTR_TIMEOUT_TU]);
+		assoc_params.valid |= ASSOC_PARAMS_TIMEOUT;
+	}
+
+	rtnl_lock();
+	err = drv->ops->associate(&drv->wiphy, dev, &assoc_params);
+	rtnl_unlock();
+
+ out:
+	cfg80211_put_dev(drv);
+	dev_put(dev);
+	return err;
+}
+
+static int nl80211_disassoc_deauth(struct sk_buff *skb, struct genl_info *info)
+{
+	struct cfg80211_registered_device *drv;
+	int err;
+	struct net_device *dev;
+	int (*act)(struct wiphy *wiphy, struct net_device *dev);
+
+	err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
+	if (err)
+		return err;
+
+	switch (info->genlhdr->cmd) {
+	case NL80211_CMD_DISASSOCIATE:
+		act = drv->ops->disassociate;
+		break;
+	case NL80211_CMD_DEAUTH:
+		act = drv->ops->deauth;
+		break;
+	default:
+		act = NULL;
+	}
+
+	if (!act) {
+		err = -EOPNOTSUPP;
+		goto out;
+	}
+
+	rtnl_lock();
+	err = act(&drv->wiphy, dev);
+	rtnl_unlock();
+ out:
+	cfg80211_put_dev(drv);
+	dev_put(dev);
+	return err;
+}
+
+struct add_cb_data {
+	int idx;
+	struct sk_buff *skb;
+};
+
+static int add_bssid(void *data, u8 *bssid)
+{
+	struct add_cb_data *cb = data;
+	int err = -ENOBUFS;
+	struct nlattr *start;
+
+	start = nla_nest_start(cb->skb, cb->idx++);
+	if (!start)
+		goto nla_put_failure;
+
+	NLA_PUT(cb->skb, NL80211_ATTR_BSSID, ETH_ALEN, bssid);
+
+	nla_nest_end(cb->skb, start);
+	err = 0;
+
+ nla_put_failure:
+	return err;
+}
+
+static int nl80211_get_auth_list(struct sk_buff *skb, struct genl_info *info)
+{
+	struct cfg80211_registered_device *drv;
+	struct net_device *dev;
+	struct sk_buff *msg;
+	void *hdr;
+	int err;
+	struct nlattr *start;
+	struct add_cb_data cb;
+
+	err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
+	if (err)
+		return err;
+
+	if (!drv->ops->get_auth_list) {
+		err = -EOPNOTSUPP;
+		goto put_drv;
+	}
+
+	hdr = nl80211msg_new(&msg, info->snd_pid, info->snd_seq, 0,
+			     NL80211_CMD_NEW_AUTH_LIST);
+	if (IS_ERR(hdr)) {
+		err = PTR_ERR(hdr);
+		goto put_drv;
+	}
+
+	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
+
+	start = nla_nest_start(msg, NL80211_ATTR_BSS_LIST);
+	if (!start) {
+		err = -ENOBUFS;
+		goto msg_free;
+	}
+
+	cb.skb = msg;
+	cb.idx = 1;
+	rtnl_lock();
+	err = drv->ops->get_auth_list(&drv->wiphy, dev, &cb, add_bssid);
+	rtnl_unlock();
+	if (err)
+		goto msg_free;
+
+	nla_nest_end(msg, start);
+
+	genlmsg_end(msg, hdr);
+
+	err = genlmsg_unicast(msg, info->snd_pid);
+	goto put_drv;
+
+ nla_put_failure:
+	err = -ENOBUFS;
+ msg_free:
+	nlmsg_free(msg);
+ put_drv:
+	cfg80211_put_dev(drv);
+	dev_put(dev);
+	return err;
+}
+
+static int nl80211_initiate_scan(struct sk_buff *skb, struct genl_info *info)
+{
+	struct cfg80211_registered_device *drv;
+	int err;
+	struct net_device *dev;
+	struct scan_params params;
+	struct scan_channel *channels = NULL;
+	int count = -1;
+
+	if (info->attrs[NL80211_ATTR_PHYMODE])
+		params.phymode = nla_get_u32(info->attrs[NL80211_ATTR_PHYMODE]);
+
+	if (params.phymode > NL80211_PHYMODE_MAX)
+		return -EINVAL;
+
+	err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
+	if (err)
+		return err;
+
+	if (!drv->ops->initiate_scan) {
+		err = -EOPNOTSUPP;
+		goto out;
+	}
+
+	params.active = nla_get_flag(info->attrs[NL80211_ATTR_FLAG_SCAN_ACTIVE]);
+
+	if (info->attrs[NL80211_ATTR_CHANNEL_LIST]) {
+		struct nlattr *attr = info->attrs[NL80211_ATTR_CHANNEL_LIST];
+		struct nlattr *nla;
+		int rem;
+		struct nlattr **tb;
+
+		/* let's count first */
+		count = 0;
+		nla_for_each_attr(nla, nla_data(attr), nla_len(attr), rem)
+			count++;
+
+		if (count == 0) {
+			/* assume we should actually scan all channels,
+			 * scanning no channels make no sense */
+			count = -1;
+			goto done_channels;
+		}
+
+		if (count > NL80211_MAX_CHANNEL_LIST_ITEM) {
+			err = -EINVAL;
+			goto out;
+		}
+
+		channels = kmalloc(count * sizeof(struct scan_channel),
+				   GFP_KERNEL);
+		tb = kmalloc((NL80211_ATTR_MAX+1) * sizeof(struct nlattr),
+			     GFP_KERNEL);
+
+		count = 0;
+		nla_for_each_attr(nla, nla_data(attr), nla_len(attr), rem) {
+			err = nla_parse(tb, NL80211_ATTR_MAX, nla_data(nla),
+					nla_len(nla), nl80211_policy);
+
+			if (err || !tb[NL80211_ATTR_CHANNEL]) {
+				err = -EINVAL;
+				kfree(tb);
+				kfree(channels);
+				goto out;
+			}
+
+			channels[count].phymode = params.phymode;
+
+			if (tb[NL80211_ATTR_PHYMODE])
+				channels[count].phymode =
+					nla_get_u32(tb[NL80211_ATTR_PHYMODE]);
+
+			if (channels[count].phymode > NL80211_PHYMODE_MAX) {
+				err = -EINVAL;
+				kfree(tb);
+				kfree(channels);
+				goto out;
+			}
+
+			channels[count].channel =
+				nla_get_u32(tb[NL80211_ATTR_CHANNEL]);
+
+			channels[count].active =
+				nla_get_flag(tb[NL80211_ATTR_FLAG_SCAN_ACTIVE]);
+			count++;
+		}
+		kfree(tb);
+	}
+
+ done_channels:
+	params.channels = channels;
+	params.n_channels = count;
+
+	rtnl_lock();
+	err = drv->ops->initiate_scan(&drv->wiphy, dev, &params);
+	rtnl_unlock();
+
+	kfree(channels);
+ out:
+	cfg80211_put_dev(drv);
+	dev_put(dev);
+	return err;
+}
+
+static int nl80211_rename_wiphy(struct sk_buff *skb, struct genl_info *info)
+{
+	struct cfg80211_registered_device *rdev;
+	int result;
+
+	if (!info->attrs[NL80211_ATTR_WIPHY_NAME])
+		return -EINVAL;
+
+	rdev = cfg80211_get_dev_from_info(info);
+	if (IS_ERR(rdev))
+		return PTR_ERR(rdev);
+
+	result = cfg80211_dev_rename(rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
+
+	cfg80211_put_dev(rdev);
+	return result;
+}
+
+static int nl80211_key_cmd(struct sk_buff *skb, struct genl_info *info)
+{
+	struct cfg80211_registered_device *drv;
+	int err, del;
+	struct net_device *dev;
+	struct key_params params;
+	int (*act)(struct wiphy *wiphy, struct net_device *dev,
+		   struct key_params *params);
+
+	memset(&params, 0, sizeof(params));
+
+	if (!info->attrs[NL80211_ATTR_KEY_TYPE])
+		return -EINVAL;
+
+	if (!info->attrs[NL80211_ATTR_KEY_CIPHER])
+		return -EINVAL;
+
+	params.key_type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
+	if (params.key_type > NL80211_KEYTYPE_MAX)
+		return -EINVAL;
+
+	err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
+	if (err)
+		return err;
+
+	switch (info->genlhdr->cmd) {
+	case NL80211_CMD_ADD_KEY:
+		act = drv->ops->add_key;
+		del = 0;
+		break;
+	case NL80211_CMD_DEL_KEY:
+		act = drv->ops->del_key;
+		del = 1;
+		break;
+	default:
+		act = NULL;
+	}
+
+	if (!act) {
+		err = -EOPNOTSUPP;
+		goto out;
+	}
+
+	if (info->attrs[NL80211_ATTR_KEY_DATA]) {
+		params.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
+		params.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
+	}
+
+	if (info->attrs[NL80211_ATTR_KEY_ID]) {
+		params.key_id = nla_get_u32(info->attrs[NL80211_ATTR_KEY_ID]);
+	} else {
+		params.key_id = -1;
+	}
+
+	params.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
+
+	if (info->attrs[NL80211_ATTR_MAC]) {
+		params.macaddress = nla_data(info->attrs[NL80211_ATTR_MAC]);
+	} else {
+		params.macaddress = NULL;
+	}
+
+	rtnl_lock();
+	err = act(&drv->wiphy, dev, &params);
+	rtnl_unlock();
+
+ out:
+	cfg80211_put_dev(drv);
+	dev_put(dev);
+	return err;
+}
+
+static struct genl_ops nl80211_ops[] = {
+	{
+		.cmd = NL80211_CMD_RENAME_WIPHY,
+		.doit = nl80211_rename_wiphy,
+		.policy = nl80211_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = NL80211_CMD_GET_CMDLIST,
+		.doit = nl80211_get_cmdlist,
+		.policy = nl80211_policy,
+		/* can be retrieved by unprivileged users */
+	},
+	{
+		.cmd = NL80211_CMD_ADD_VIRTUAL_INTERFACE,
+		.doit = nl80211_add_virt_intf,
+		.policy = nl80211_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = NL80211_CMD_DEL_VIRTUAL_INTERFACE,
+		.doit = nl80211_del_virt_intf,
+		.policy = nl80211_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = NL80211_CMD_CHANGE_VIRTUAL_INTERFACE,
+		.doit = nl80211_change_virt_intf,
+		.policy = nl80211_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = NL80211_CMD_GET_WIPHYS,
+		.doit = nl80211_get_wiphys,
+		.policy = nl80211_policy,
+		/* can be retrieved by unprivileged users */
+	},
+	{
+		.cmd = NL80211_CMD_GET_INTERFACES,
+		.doit = nl80211_get_intfs,
+		.policy = nl80211_policy,
+		/* can be retrieved by unprivileged users */
+	},
+	{
+		.cmd = NL80211_CMD_INITIATE_SCAN,
+		.doit = nl80211_initiate_scan,
+		.policy = nl80211_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = NL80211_CMD_GET_ASSOCIATION,
+		.doit = nl80211_get_association,
+		.policy = nl80211_policy,
+		/* can be retrieved by unprivileged users */
+	},
+	{
+		.cmd = NL80211_CMD_ASSOCIATE,
+		.doit = nl80211_associate,
+		.policy = nl80211_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = NL80211_CMD_DISASSOCIATE,
+		.doit = nl80211_disassoc_deauth,
+		.policy = nl80211_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = NL80211_CMD_DEAUTH,
+		.doit = nl80211_disassoc_deauth,
+		.policy = nl80211_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = NL80211_CMD_GET_AUTH_LIST,
+		.doit = nl80211_get_auth_list,
+		.policy = nl80211_policy,
+		/* can be retrieved by unprivileged users */
+	},
+/*
+	{
+		.cmd = NL80211_CMD_AP_SET_BEACON,
+		.policy = nl80211_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = NL80211_CMD_AP_ADD_STA,
+		.policy = nl80211_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = NL80211_CMD_AP_UPDATE_STA,
+		.policy = nl80211_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = NL80211_CMD_AP_GET_STA_INFO,
+		.policy = nl80211_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = NL80211_CMD_AP_SET_RATESETS,
+		.policy = nl80211_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+*/
+	{
+		.cmd = NL80211_CMD_ADD_KEY,
+		.doit = nl80211_key_cmd,
+		.policy = nl80211_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = NL80211_CMD_DEL_KEY,
+		.doit = nl80211_key_cmd,
+		.policy = nl80211_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+};
+
+
+/* exported functions */
+
+void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq, int flags, u8 cmd)
+{
+	/* since there is no private header just add the generic one */
+	return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
+}
+EXPORT_SYMBOL_GPL(nl80211hdr_put);
+
+void *nl80211msg_new(struct sk_buff **skb, u32 pid, u32 seq, int flags, u8 cmd)
+{
+	void *hdr;
+
+	*skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+	if (!*skb)
+		return ERR_PTR(-ENOBUFS);
+
+	hdr = nl80211hdr_put(*skb, pid, seq, flags, cmd);
+	if (!hdr) {
+		nlmsg_free(*skb);
+		return ERR_PTR(-ENOBUFS);
+	}
+
+	return hdr;
+}
+EXPORT_SYMBOL_GPL(nl80211msg_new);
+
+/* notification functions */
+
+void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
+{
+	struct sk_buff *msg;
+	void *hdr;
+
+	hdr = nl80211msg_new(&msg, 0, 0, 0, NL80211_CMD_WIPHY_NEWNAME);
+	if (IS_ERR(hdr))
+		return;
+
+	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->idx);
+	NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&rdev->wiphy));
+
+	genlmsg_end(msg, hdr);
+	genlmsg_multicast(msg, 0, NL80211_GROUP_CONFIG, GFP_KERNEL);
+
+	return;
+
+ nla_put_failure:
+	nlmsg_free(msg);
+}
+
+/* initialisation/exit functions */
+
+int nl80211_init(void)
+{
+	int err, i;
+
+	err = genl_register_family(&nl80211_fam);
+	if (err)
+		return err;
+
+	for (i = 0; i < ARRAY_SIZE(nl80211_ops); i++) {
+		err = genl_register_ops(&nl80211_fam, &nl80211_ops[i]);
+		if (err)
+			goto err_out;
+	}
+	return 0;
+ err_out:
+	genl_unregister_family(&nl80211_fam);
+	return err;
+}
+
+void nl80211_exit(void)
+{
+	genl_unregister_family(&nl80211_fam);
+}

package/mac80211/src/wireless/nl80211.h

@@ -0,0 +1,24 @@
+#ifndef __NET_WIRELESS_NL80211_H
+#define __NET_WIRELESS_NL80211_H
+
+#include "core.h"
+
+#ifdef CONFIG_NL80211
+extern int nl80211_init(void);
+extern void nl80211_exit(void);
+extern void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev);
+#else
+static inline int nl80211_init(void)
+{
+	return 0;
+}
+static inline void nl80211_exit(void)
+{
+}
+static inline void nl80211_notify_dev_rename(
+	struct cfg80211_registered_device *rdev)
+{
+}
+#endif /* CONFIG_NL80211 */
+
+#endif /* __NET_WIRELESS_NL80211_H */

package/mac80211/src/wireless/sysfs.c

@@ -0,0 +1,130 @@
+/*
+ * This file provides /sys/class/ieee80211/<wiphy name>/
+ * and some default attributes.
+ *
+ * Copyright 2005-2006	Jiri Benc <jbenc@suse.cz>
+ * Copyright 2006	Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This file is GPLv2 as found in COPYING.
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/nl80211.h>
+#include <linux/rtnetlink.h>
+#include <net/cfg80211.h>
+#include "sysfs.h"
+#include "core.h"
+
+static inline struct cfg80211_registered_device *dev_to_rdev(
+	struct device *dev)
+{
+	return container_of(dev, struct cfg80211_registered_device, wiphy.dev);
+}
+
+static ssize_t _show_index(struct device *dev, struct device_attribute *attr,
+			   char *buf)
+{
+	return sprintf(buf, "%d\n", dev_to_rdev(dev)->idx);
+}
+
+static ssize_t _show_permaddr(struct device *dev,
+			      struct device_attribute *attr,
+			      char *buf)
+{
+	unsigned char *addr = dev_to_rdev(dev)->wiphy.perm_addr;
+
+	return sprintf(buf, "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n",
+		       addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
+}
+
+static ssize_t _store_add_iface(struct device *dev,
+				struct device_attribute *attr,
+				const char *buf, size_t len)
+{
+	struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
+	int res;
+
+	if (len > IFNAMSIZ)
+		return -EINVAL;
+
+	if (!rdev->ops->add_virtual_intf)
+		return -ENOSYS;
+
+	rtnl_lock();
+	res = rdev->ops->add_virtual_intf(&rdev->wiphy, (char*)buf,
+					  NL80211_IFTYPE_UNSPECIFIED);
+	rtnl_unlock();
+
+	return res ? res : len;
+}
+
+static ssize_t _store_remove_iface(struct device *dev,
+				   struct device_attribute *attr,
+				   const char *buf, size_t len)
+{
+	struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
+	int res, ifidx;
+	struct net_device *netdev;
+
+	if (len > IFNAMSIZ)
+		return -EINVAL;
+
+	if (!rdev->ops->del_virtual_intf)
+		return -ENOSYS;
+
+	netdev = dev_get_by_name(buf);
+	if (!netdev)
+		return -ENODEV;
+	ifidx = netdev->ifindex;
+	dev_put(netdev);
+
+	rtnl_lock();
+	res = rdev->ops->del_virtual_intf(&rdev->wiphy, ifidx);
+	rtnl_unlock();
+
+	return res ? res : len;
+}
+
+static struct device_attribute ieee80211_dev_attrs[] = {
+	__ATTR(index, S_IRUGO, _show_index, NULL),
+	__ATTR(macaddress, S_IRUGO, _show_permaddr, NULL),
+	__ATTR(add_iface, S_IWUGO, NULL, _store_add_iface),
+	__ATTR(remove_iface, S_IWUGO, NULL, _store_remove_iface),
+	{}
+};
+
+static void wiphy_dev_release(struct device *dev)
+{
+	struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
+
+	cfg80211_dev_free(rdev);
+}
+
+static int wiphy_uevent(struct device *dev, char **envp,
+			int num_envp, char *buf, int size)
+{
+	/* TODO, we probably need stuff here */
+	return 0;
+}
+
+struct class ieee80211_class = {
+	.name = "ieee80211",
+	.owner = THIS_MODULE,
+	.dev_release = wiphy_dev_release,
+	.dev_attrs = ieee80211_dev_attrs,
+#ifdef CONFIG_HOTPLUG
+	.dev_uevent = wiphy_uevent,
+#endif
+};
+
+int wiphy_sysfs_init(void)
+{
+	return class_register(&ieee80211_class);
+}
+
+void wiphy_sysfs_exit(void)
+{
+	class_unregister(&ieee80211_class);
+}

package/mac80211/src/wireless/sysfs.h

@@ -0,0 +1,9 @@
+#ifndef __WIRELESS_SYSFS_H
+#define __WIRELESS_SYSFS_H
+
+extern int wiphy_sysfs_init(void);
+extern void wiphy_sysfs_exit(void);
+
+extern struct class ieee80211_class;
+
+#endif /* __WIRELESS_SYSFS_H */