Add hostapd support for nl80211 (mac80211 stack)

SVN-Revision: 10469

6 files changed, 2968 insertions, 0 deletions

diff --git a/package/hostapd/files/default.config b/package/hostapd/files/default.config
index f383e116cd..7e7555f71e 100644
--- a/package/hostapd/files/default.config
+++ b/package/hostapd/files/default.config
@@ -22,6 +22,14 @@ CONFIG_DRIVER_MADWIFI=y
 # Driver interface for Prism54 driver
 #CONFIG_DRIVER_PRISM54=y
 
+# Driver interface for drivers using the nl80211 kernel interface
+CONFIG_DRIVER_NL80211=y
+# driver_nl80211.c requires a rather new libnl, probably not
+# shipped with your distribution yet
+#LIBNL=/usr/src/libnl
+#CFLAGS += -I$(LIBNL)/include
+#LIBS += -L$(LIBNL)/lib
+
 # Driver interface for drivers using Devicescape IEEE 802.11 stack
 #CONFIG_DRIVER_DEVICESCAPE=y
 # Currently, driver_devicescape.c build requires some additional parameters
diff --git a/package/hostapd/files/driver_nl80211.c b/package/hostapd/files/driver_nl80211.c
new file mode 100644
index 0000000000..d673aa5044
--- /dev/null
+++ b/package/hostapd/files/driver_nl80211.c
@@ -0,0 +1,2382 @@
+/*
+ * hostapd / Kernel driver communication via nl80211
+ * Copyright (c) 2002-2007, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2003-2004, Instant802 Networks, Inc.
+ * Copyright (c) 2005-2006, Devicescape Software, Inc.
+ * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
+ *
+ * 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.
+ *
+ * Alternatively, this software may be distributed under the terms of BSD
+ * license.
+ *
+ * See README and COPYING for more details.
+ */
+
+#include "includes.h"
+
+#include <sys/ioctl.h>
+#include <netlink/genl/genl.h>
+#include <netlink/genl/family.h>
+#include <netlink/genl/ctrl.h>
+#include <netlink/msg.h>
+#include <netlink/attr.h>
+#include <linux/nl80211.h>
+#include <net/if.h>
+#include <linux/if_packet.h>
+#include <linux/if_ether.h>   /* The L2 protocols */
+#include <linux/wireless.h>
+#include <net/if_arp.h>
+
+#include "hostapd.h"
+#include "driver.h"
+#include "ieee802_1x.h"
+#include "eloop.h"
+#include "ieee802_11.h"
+#include "sta_info.h"
+#include "hw_features.h"
+#include "mlme.h"
+#include "radiotap.h"
+#include "radiotap_iter.h"
+
+enum ieee80211_msg_type {
+	ieee80211_msg_normal = 0,
+	ieee80211_msg_tx_callback_ack = 1,
+	ieee80211_msg_tx_callback_fail = 2,
+};
+
+struct i802_driver_data {
+	struct hostapd_data *hapd;
+
+	char iface[IFNAMSIZ + 1];
+	int ioctl_sock; /* socket for ioctl() use */
+	int wext_sock; /* socket for wireless events */
+	int eapol_sock; /* socket for EAPOL frames */
+	int monitor_sock; /* socket for monitor */
+	int monitor_ifidx;
+
+	int default_if_indices[16];
+	int *if_indices;
+	int num_if_indices;
+
+	int we_version;
+	struct nl_handle *nl_handle;
+	struct nl_cache *nl_cache;
+	struct genl_family *nl80211;
+	int dtim_period;
+	unsigned int beacon_set:1;
+	unsigned int ieee802_1x_active:1;
+};
+
+
+static void add_ifidx(struct i802_driver_data *drv, int ifidx)
+{
+	int i;
+	int *old;
+
+	for (i = 0; i < drv->num_if_indices; i++) {
+		if (drv->if_indices[i] == 0) {
+			drv->if_indices[i] = ifidx;
+			return;
+		}
+	}
+
+	if (drv->if_indices != drv->default_if_indices)
+		old = drv->if_indices;
+	else
+		old = NULL;
+
+	drv->if_indices = realloc(old,
+				  sizeof(int) * (drv->num_if_indices + 1));
+	if (!drv->if_indices) {
+		if (!old)
+			drv->if_indices = drv->default_if_indices;
+		else
+			drv->if_indices = old;
+		wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
+			   "interfaces");
+		wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
+		return;
+	}
+	drv->if_indices[drv->num_if_indices] = ifidx;
+	drv->num_if_indices++;
+}
+
+
+static void del_ifidx(struct i802_driver_data *drv, int ifidx)
+{
+	int i;
+
+	for (i = 0; i < drv->num_if_indices; i++) {
+		if (drv->if_indices[i] == ifidx) {
+			drv->if_indices[i] = 0;
+			break;
+		}
+	}
+}
+
+
+static int have_ifidx(struct i802_driver_data *drv, int ifidx)
+{
+	int i;
+
+	for (i = 0; i < drv->num_if_indices; i++)
+		if (drv->if_indices[i] == ifidx)
+			return 1;
+
+	return 0;
+}
+
+
+/* helper for netlink get routines */
+static int ack_wait_handler(struct nl_msg *msg, void *arg)
+{
+	int *finished = arg;
+
+	*finished = 1;
+	return NL_STOP;
+}
+
+
+static int hostapd_set_iface_flags(struct i802_driver_data *drv,
+				   const char *ifname, int dev_up)
+{
+	struct ifreq ifr;
+
+	if (drv->ioctl_sock < 0)
+		return -1;
+
+	memset(&ifr, 0, sizeof(ifr));
+	os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
+
+	if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
+		perror("ioctl[SIOCGIFFLAGS]");
+		wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
+			   drv->iface);
+		return -1;
+	}
+
+	if (dev_up)
+		ifr.ifr_flags |= IFF_UP;
+	else
+		ifr.ifr_flags &= ~IFF_UP;
+
+	if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
+		perror("ioctl[SIOCSIFFLAGS]");
+		return -1;
+	}
+
+	return 0;
+}
+
+
+static int i802_set_encryption(const char *iface, void *priv, const char *alg,
+			       const u8 *addr, int idx, const u8 *key,
+			       size_t key_len, int txkey)
+{
+	struct i802_driver_data *drv = priv;
+	struct nl_msg *msg;
+	int ret = -1;
+	int err = 0;
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		goto out;
+
+	if (strcmp(alg, "none") == 0) {
+		genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+			    0, NL80211_CMD_DEL_KEY, 0);
+	} else {
+		genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+			    0, NL80211_CMD_NEW_KEY, 0);
+		NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
+		if (strcmp(alg, "WEP") == 0) {
+			if (key_len == 5)
+				NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
+					    0x000FAC01);
+			else
+				NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
+					    0x000FAC05);
+		} else if (strcmp(alg, "TKIP") == 0)
+			NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
+		else if (strcmp(alg, "CCMP") == 0)
+			NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
+		else
+			goto out;
+	}
+
+	if (addr)
+		NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
+	NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
+	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
+
+	if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
+	    (err = nl_wait_for_ack(drv->nl_handle)) < 0) {
+		if (err != -ENOENT) {
+			err = 0;
+			goto out;
+		}
+	}
+
+	/*
+	 * If we need to set the default TX key we do that below,
+	 * otherwise we're done here.
+	 */
+	if (!txkey || addr) {
+		ret = 0;
+		goto out;
+	}
+
+	nlmsg_free(msg);
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		goto out;
+
+	genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+		    0, NL80211_CMD_SET_KEY, 0);
+	NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
+	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
+	NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
+
+	if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
+	    (err = nl_wait_for_ack(drv->nl_handle)) < 0) {
+		if (err != -ENOENT) {
+			err = 0;
+			goto out;
+		}
+	}
+
+	ret = 0;
+
+ out:
+ nla_put_failure:
+	nlmsg_free(msg);
+	return ret;
+}
+
+
+static inline int min_int(int a, int b)
+{
+	if (a < b)
+		return a;
+	return b;
+}
+
+
+static int get_key_handler(struct nl_msg *msg, void *arg)
+{
+	struct nlattr *tb[NL80211_ATTR_MAX];
+	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+
+	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
+		  genlmsg_attrlen(gnlh, 0), NULL);
+
+	/*
+	 * TODO: validate the key index and mac address!
+	 * Otherwise, there's a race condition as soon as
+	 * the kernel starts sending key notifications.
+	 */
+
+	if (tb[NL80211_ATTR_KEY_SEQ])
+		memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
+		       min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
+	return NL_SKIP;
+}
+
+
+static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
+			   int idx, u8 *seq)
+{
+	struct i802_driver_data *drv = priv;
+	struct nl_msg *msg;
+	struct nl_cb *cb = NULL;
+	int ret = -1;
+	int err = 0;
+	int finished = 0;
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		goto out;
+
+	genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+		    0, NL80211_CMD_GET_KEY, 0);
+
+	if (addr)
+		NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
+	NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
+	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
+
+	cb = nl_cb_alloc(NL_CB_CUSTOM);
+	if (!cb)
+		goto out;
+
+	memset(seq, 0, 6);
+
+	if (nl_send_auto_complete(drv->nl_handle, msg) < 0)
+		goto out;
+
+	nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, get_key_handler, seq);
+	nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_wait_handler, &finished);
+
+	err = nl_recvmsgs(drv->nl_handle, cb);
+
+	if (!finished)
+		err = nl_wait_for_ack(drv->nl_handle);
+
+	if (err < 0)
+		goto out;
+
+	ret = 0;
+
+ out:
+	nl_cb_put(cb);
+ nla_put_failure:
+	nlmsg_free(msg);
+	return ret;
+}
+
+
+static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
+			      int mode)
+{
+	return -1;
+}
+
+
+static int i802_set_ssid(const char *ifname, void *priv, const u8 *buf,
+			 int len)
+{
+	struct i802_driver_data *drv = priv;
+	struct iwreq iwr;
+
+	memset(&iwr, 0, sizeof(iwr));
+	os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
+	iwr.u.essid.flags = 1; /* SSID active */
+	iwr.u.essid.pointer = (caddr_t) buf;
+	iwr.u.essid.length = len;
+
+	if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
+		perror("ioctl[SIOCSIWESSID]");
+		printf("len=%d\n", len);
+		return -1;
+	}
+
+	return 0;
+}
+
+
+static int i802_send_mgmt_frame(void *priv, const void *data, size_t len,
+				int flags)
+{
+	struct ieee80211_hdr *hdr = (void*) data;
+	__u8 rtap_hdr[] = {
+		0x00, 0x00, /* radiotap version */
+		0x0e, 0x00, /* radiotap length */
+		0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
+		0x0c,       /* F_WEP | F_FRAG (encrypt/fragment if required) */
+		0x00,       /* padding */
+		0x00, 0x00, /* RX and TX flags to indicate that */
+		0x00, 0x00, /* this is the injected frame directly */
+	};
+	struct i802_driver_data *drv = priv;
+	struct iovec iov[2] = {
+		{
+			.iov_base = &rtap_hdr,
+			.iov_len = sizeof(rtap_hdr),
+		},
+		{
+			.iov_base = (void*)data,
+			.iov_len = len,
+		}
+	};
+	struct msghdr msg = {
+		.msg_name = NULL,
+		.msg_namelen = 0,
+		.msg_iov = iov,
+		.msg_iovlen = 2,
+		.msg_control = NULL,
+		.msg_controllen = 0,
+		.msg_flags = 0,
+	};
+
+	/*
+	 * ugh, guess what, the generic code sets one of the version
+	 * bits to request tx callback
+	 */
+	hdr->frame_control &= ~host_to_le16(BIT(1));
+	return sendmsg(drv->monitor_sock, &msg, flags);
+}
+
+
+/* Set kernel driver on given frequency (MHz) */
+static int i802_set_freq(void *priv, int mode, int freq)
+{
+	struct i802_driver_data *drv = priv;
+	struct iwreq iwr;
+
+	memset(&iwr, 0, sizeof(iwr));
+	os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
+	iwr.u.freq.m = freq;
+	iwr.u.freq.e = 6;
+
+	if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
+		perror("ioctl[SIOCSIWFREQ]");
+		return -1;
+	}
+
+	return 0;
+}
+
+
+static int i802_set_rts(void *priv, int rts)
+{
+	struct i802_driver_data *drv = priv;
+	struct iwreq iwr;
+
+	memset(&iwr, 0, sizeof(iwr));
+	os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
+	iwr.u.rts.value = rts;
+	iwr.u.rts.fixed = 1;
+
+	if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
+		perror("ioctl[SIOCSIWRTS]");
+		return -1;
+	}
+
+	return 0;
+}
+
+
+static int i802_get_rts(void *priv, int *rts)
+{
+	struct i802_driver_data *drv = priv;
+	struct iwreq iwr;
+
+	memset(&iwr, 0, sizeof(iwr));
+	os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
+
+	if (ioctl(drv->ioctl_sock, SIOCGIWRTS, &iwr) < 0) {
+		perror("ioctl[SIOCGIWRTS]");
+		return -1;
+	}
+
+	*rts = iwr.u.rts.value;
+
+	return 0;
+}
+
+
+static int i802_set_frag(void *priv, int frag)
+{
+	struct i802_driver_data *drv = priv;
+	struct iwreq iwr;
+
+	memset(&iwr, 0, sizeof(iwr));
+	os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
+	iwr.u.frag.value = frag;
+	iwr.u.frag.fixed = 1;
+
+	if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
+		perror("ioctl[SIOCSIWFRAG]");
+		return -1;
+	}
+
+	return 0;
+}
+
+
+static int i802_get_frag(void *priv, int *frag)
+{
+	struct i802_driver_data *drv = priv;
+	struct iwreq iwr;
+
+	memset(&iwr, 0, sizeof(iwr));
+	os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
+
+	if (ioctl(drv->ioctl_sock, SIOCGIWFRAG, &iwr) < 0) {
+		perror("ioctl[SIOCGIWFRAG]");
+		return -1;
+	}
+
+	*frag = iwr.u.frag.value;
+
+	return 0;
+}
+
+
+static int i802_set_retry(void *priv, int short_retry, int long_retry)
+{
+	struct i802_driver_data *drv = priv;
+	struct iwreq iwr;
+
+	memset(&iwr, 0, sizeof(iwr));
+	os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
+
+	iwr.u.retry.value = short_retry;
+	iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
+	if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
+		perror("ioctl[SIOCSIWRETRY(short)]");
+		return -1;
+	}
+
+	iwr.u.retry.value = long_retry;
+	iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
+	if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
+		perror("ioctl[SIOCSIWRETRY(long)]");
+		return -1;
+	}
+
+	return 0;
+}
+
+
+static int i802_get_retry(void *priv, int *short_retry, int *long_retry)
+{
+	struct i802_driver_data *drv = priv;
+	struct iwreq iwr;
+
+	memset(&iwr, 0, sizeof(iwr));
+	os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
+
+	iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
+	if (ioctl(drv->ioctl_sock, SIOCGIWRETRY, &iwr) < 0) {
+		perror("ioctl[SIOCGIWFRAG(short)]");
+		return -1;
+	}
+	*short_retry = iwr.u.retry.value;
+
+	iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
+	if (ioctl(drv->ioctl_sock, SIOCGIWRETRY, &iwr) < 0) {
+		perror("ioctl[SIOCGIWFRAG(long)]");
+		return -1;
+	}
+	*long_retry = iwr.u.retry.value;
+
+	return 0;
+}
+
+
+static int i802_flush(void *priv)
+{
+	struct i802_driver_data *drv = priv;
+	struct nl_msg *msg;
+	int ret = -1;
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		goto out;
+
+	genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+		    0, NL80211_CMD_NEW_STATION, 0);
+
+	/*
+	 * XXX: FIX! this needs to flush all VLANs too
+	 */
+	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
+		    if_nametoindex(drv->iface));
+
+	ret = 0;
+
+	if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
+	    nl_wait_for_ack(drv->nl_handle) < 0) {
+		ret = -1;
+	}
+
+ nla_put_failure:
+	nlmsg_free(msg);
+
+ out:
+	return ret;
+}
+
+
+static int get_sta_handler(struct nl_msg *msg, void *arg)
+{
+	struct nlattr *tb[NL80211_ATTR_MAX + 1];
+	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+	struct hostap_sta_driver_data *data = arg;
+	struct nlattr *stats[NL80211_STA_STAT_MAX + 1];
+	static struct nla_policy stats_policy[NL80211_STA_STAT_MAX + 1] = {
+		[NL80211_STA_STAT_INACTIVE_TIME] = { .type = NLA_U32 },
+		[NL80211_STA_STAT_RX_BYTES] = { .type = NLA_U32 },
+		[NL80211_STA_STAT_TX_BYTES] = { .type = NLA_U32 },
+	};
+
+	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
+		  genlmsg_attrlen(gnlh, 0), NULL);
+
+	/*
+	 * TODO: validate the interface and mac address!
+	 * Otherwise, there's a race condition as soon as
+	 * the kernel starts sending station notifications.
+	 */
+
+	if (!tb[NL80211_ATTR_STA_STATS]) {
+		wpa_printf(MSG_DEBUG, "sta stats missing!");
+		return NL_SKIP;
+	}
+	if (nla_parse_nested(stats, NL80211_STA_STAT_MAX,
+			     tb[NL80211_ATTR_STA_STATS],
+			     stats_policy)) {
+		wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
+		return NL_SKIP;
+	}
+
+	if (stats[NL80211_STA_STAT_INACTIVE_TIME])
+		data->inactive_msec =
+			nla_get_u32(stats[NL80211_STA_STAT_INACTIVE_TIME]);
+	if (stats[NL80211_STA_STAT_RX_BYTES])
+		data->rx_bytes = nla_get_u32(stats[NL80211_STA_STAT_RX_BYTES]);
+	if (stats[NL80211_STA_STAT_TX_BYTES])
+		data->rx_bytes = nla_get_u32(stats[NL80211_STA_STAT_TX_BYTES]);
+
+	return NL_SKIP;
+}
+
+static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
+			      const u8 *addr)
+{
+	struct i802_driver_data *drv = priv;
+	struct nl_msg *msg;
+	struct nl_cb *cb = NULL;
+	int ret = -1;
+	int err = 0;
+	int finished = 0;
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		goto out;
+
+	genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+		    0, NL80211_CMD_GET_STATION, 0);
+
+	NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
+	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
+
+	cb = nl_cb_alloc(NL_CB_CUSTOM);
+	if (!cb)
+		goto out;
+
+	if (nl_send_auto_complete(drv->nl_handle, msg) < 0)
+		goto out;
+
+	nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, get_sta_handler, data);
+	nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_wait_handler, &finished);
+
+	err = nl_recvmsgs(drv->nl_handle, cb);
+
+	if (!finished)
+		err = nl_wait_for_ack(drv->nl_handle);
+
+	if (err < 0)
+		goto out;
+
+	ret = 0;
+
+ out:
+	nl_cb_put(cb);
+ nla_put_failure:
+	nlmsg_free(msg);
+	return ret;
+
+}
+
+
+static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
+			   size_t data_len, int encrypt, const u8 *own_addr)
+{
+	struct i802_driver_data *drv = priv;
+	struct ieee80211_hdr *hdr;
+	size_t len;
+	u8 *pos;
+	int res;
+#if 0 /* FIX */
+	int qos = sta->flags & WLAN_STA_WME;
+#else
+	int qos = 0;
+#endif
+
+	len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
+		data_len;
+	hdr = os_zalloc(len);
+	if (hdr == NULL) {
+		printf("malloc() failed for i802_send_data(len=%lu)\n",
+		       (unsigned long) len);
+		return -1;
+	}
+
+	hdr->frame_control =
+		IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
+	hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
+	if (encrypt)
+		hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
+#if 0 /* To be enabled if qos determination is added above */
+	if (qos) {
+		hdr->frame_control |=
+			host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
+	}
+#endif
+
+	memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
+	memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
+	memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
+	pos = (u8 *) (hdr + 1);
+
+#if 0 /* To be enabled if qos determination is added above */
+	if (qos) {
+		/* add an empty QoS header if needed */
+		pos[0] = 0;
+		pos[1] = 0;
+		pos += 2;
+	}
+#endif
+
+	memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
+	pos += sizeof(rfc1042_header);
+	WPA_PUT_BE16(pos, ETH_P_PAE);
+	pos += 2;
+	memcpy(pos, data, data_len);
+
+	res = i802_send_mgmt_frame(drv, (u8 *) hdr, len, 0);
+	free(hdr);
+
+	if (res < 0) {
+		perror("i802_send_eapol: send");
+		printf("i802_send_eapol - packet len: %lu - failed\n",
+		       (unsigned long) len);
+	}
+
+	return res;
+}
+
+
+static int i802_sta_add(const char *ifname, void *priv, const u8 *addr,
+			u16 aid, u16 capability, u8 *supp_rates,
+			size_t supp_rates_len, int flags)
+{
+	struct i802_driver_data *drv = priv;
+	struct nl_msg *msg;
+	int ret = -1;
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		goto out;
+
+	genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+		    0, NL80211_CMD_NEW_STATION, 0);
+
+	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
+		    if_nametoindex(drv->iface));
+	NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
+	NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, aid);
+	NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, supp_rates_len,
+		supp_rates);
+	NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL, 0);
+
+	ret = nl_send_auto_complete(drv->nl_handle, msg);
+	if (ret < 0)
+		goto nla_put_failure;
+
+	ret = nl_wait_for_ack(drv->nl_handle);
+	/* ignore EEXIST, this happens if a STA associates while associated */
+	if (ret == -EEXIST || ret >= 0)
+		ret = 0;
+
+ nla_put_failure:
+	nlmsg_free(msg);
+
+ out:
+	return ret;
+}
+
+
+static int i802_sta_remove(void *priv, const u8 *addr)
+{
+	struct i802_driver_data *drv = priv;
+	struct nl_msg *msg;
+	int ret = -1;
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		goto out;
+
+	genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+		    0, NL80211_CMD_DEL_STATION, 0);
+
+	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
+		    if_nametoindex(drv->iface));
+	NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
+
+	ret = 0;
+
+	if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
+	    nl_wait_for_ack(drv->nl_handle) < 0) {
+		ret = -1;
+	}
+
+ nla_put_failure:
+	nlmsg_free(msg);
+
+ out:
+	return ret;
+}
+
+
+static int i802_sta_set_flags(void *priv, const u8 *addr,
+			      int total_flags, int flags_or, int flags_and)
+{
+	struct i802_driver_data *drv = priv;
+	struct nl_msg *msg, *flags = NULL;
+	int ret = -1;
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		goto out;
+
+	flags = nlmsg_alloc();
+	if (!flags)
+		goto free_msg;
+
+	genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+		    0, NL80211_CMD_SET_STATION, 0);
+
+	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
+		    if_nametoindex(drv->iface));
+	NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
+
+	if (total_flags & WLAN_STA_AUTHORIZED || !drv->ieee802_1x_active)
+		NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
+
+	if (total_flags & WLAN_STA_WME)
+		NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
+
+	if (total_flags & WLAN_STA_SHORT_PREAMBLE)
+		NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
+
+	if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
+		goto nla_put_failure;
+
+	ret = 0;
+
+	if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
+	    nl_wait_for_ack(drv->nl_handle) < 0) {
+		ret = -1;
+	}
+
+ nla_put_failure:
+	nlmsg_free(flags);
+
+ free_msg:
+	nlmsg_free(msg);
+
+ out:
+	return ret;
+}
+
+
+static int i802_set_channel_flag(void *priv, int mode, int chan, int flag,
+				 unsigned char power_level,
+				 unsigned char antenna_max)
+{
+	return -1;
+}
+
+
+static int i802_set_regulatory_domain(void *priv, unsigned int rd)
+{
+	return -1;
+}
+
+
+static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
+				    int cw_min, int cw_max, int burst_time)
+{
+	return -1;
+}
+
+
+static void nl80211_remove_iface(struct i802_driver_data *drv, int ifidx)
+{
+	struct nl_msg *msg;
+
+	/* stop listening for EAPOL on this interface */
+	del_ifidx(drv, ifidx);
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		goto nla_put_failure;
+
+	genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+		    0, NL80211_CMD_DEL_INTERFACE, 0);
+	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
+	if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
+	    nl_wait_for_ack(drv->nl_handle) < 0)
+	nla_put_failure:
+		printf("Failed to remove interface.\n");
+	nlmsg_free(msg);
+}
+
+
+static int nl80211_create_iface(struct i802_driver_data *drv,
+				const char *ifname,
+				enum nl80211_iftype iftype,
+				const u8 *addr)
+{
+	struct nl_msg *msg, *flags = NULL;
+	int ifidx;
+	struct ifreq ifreq;
+	struct iwreq iwr;
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		return -1;
+
+	genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+		    0, NL80211_CMD_NEW_INTERFACE, 0);
+	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
+		    if_nametoindex(drv->hapd->conf->iface));
+	NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
+	NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
+
+	if (iftype == NL80211_IFTYPE_MONITOR) {
+		int err;
+
+		flags = nlmsg_alloc();
+		if (!flags)
+			goto nla_put_failure;
+
+		NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
+
+		err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
+
+		nlmsg_free(flags);
+
+		if (err)
+			goto nla_put_failure;
+	}
+
+	if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
+	    nl_wait_for_ack(drv->nl_handle) < 0) {
+ nla_put_failure:
+		printf("Failed to create interface %s.\n", ifname);
+		nlmsg_free(msg);
+		return -1;
+	}
+
+	nlmsg_free(msg);
+
+	ifidx = if_nametoindex(ifname);
+
+	if (ifidx <= 0)
+		return -1;
+
+	/* start listening for EAPOL on this interface */
+	add_ifidx(drv, ifidx);
+
+	if (addr) {
+		switch (iftype) {
+		case NL80211_IFTYPE_AP:
+			os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
+			memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
+			ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
+
+			if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
+				nl80211_remove_iface(drv, ifidx);
+				return -1;
+			}
+			break;
+		case NL80211_IFTYPE_WDS:
+			memset(&iwr, 0, sizeof(iwr));
+			os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
+			iwr.u.addr.sa_family = ARPHRD_ETHER;
+			memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
+			if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
+				return -1;
+			break;
+		default:
+			/* nothing */
+			break;
+		}
+	}
+
+	return ifidx;
+}
+
+
+static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
+{
+	int ifidx;
+
+	/*
+	 * The kernel supports that when the low-level driver does,
+	 * but we currently don't because we need per-BSS data that
+	 * currently we can't handle easily.
+	 */
+	return -1;
+
+	ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
+	if (ifidx < 0)
+		return -1;
+	if (hostapd_set_iface_flags(priv, ifname, 1)) {
+		nl80211_remove_iface(priv, ifidx);
+		return -1;
+	}
+	return 0;
+}
+
+
+static int i802_bss_remove(void *priv, const char *ifname)
+{
+	nl80211_remove_iface(priv, if_nametoindex(ifname));
+	return 0;
+}
+
+
+static int i802_set_beacon(const char *iface, void *priv,
+			   u8 *head, size_t head_len,
+			   u8 *tail, size_t tail_len)
+{
+	struct i802_driver_data *drv = priv;
+	struct nl_msg *msg;
+	u8 cmd = NL80211_CMD_NEW_BEACON;
+	int ret = -1;
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		goto out;
+
+	if (drv->beacon_set)
+		cmd = NL80211_CMD_SET_BEACON;
+
+	genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+		    0, cmd, 0);
+	NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
+	NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
+	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
+	NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, 1000);
+
+	if (!drv->dtim_period)
+		drv->dtim_period = 2;
+	NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
+
+	if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
+	    nl_wait_for_ack(drv->nl_handle) < 0)
+		goto out;
+
+	ret = 0;
+
+	drv->beacon_set = 1;
+
+ out:
+ nla_put_failure:
+	nlmsg_free(msg);
+	return ret;
+}
+
+
+static int i802_del_beacon(struct i802_driver_data *drv)
+{
+	struct nl_msg *msg;
+	int ret = -1;
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		goto out;
+
+	genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+		    0, NL80211_CMD_DEL_BEACON, 0);
+	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
+
+	if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
+	    nl_wait_for_ack(drv->nl_handle) < 0)
+		goto out;
+
+	ret = 0;
+
+ out:
+ nla_put_failure:
+	nlmsg_free(msg);
+	return ret;
+}
+
+
+static int i802_set_ieee8021x(const char *ifname, void *priv, int enabled)
+{
+	struct i802_driver_data *drv = priv;
+
+	/*
+	 * FIXME: This needs to be per interface (BSS)
+	 */
+	drv->ieee802_1x_active = enabled;
+	return 0;
+}
+
+
+static int i802_set_privacy(const char *ifname, void *priv, int enabled)
+{
+	struct i802_driver_data *drv = priv;
+	struct iwreq iwr;
+
+	memset(&iwr, 0, sizeof(iwr));
+
+	os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
+	iwr.u.param.flags = IW_AUTH_PRIVACY_INVOKED;
+	iwr.u.param.value = enabled;
+
+	ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr);
+
+	/* ignore errors, the kernel/driver might not care */
+	return 0;
+}
+
+
+static int i802_set_internal_bridge(void *priv, int value)
+{
+	return -1;
+}
+
+
+static int i802_set_beacon_int(void *priv, int value)
+{
+	struct i802_driver_data *drv = priv;
+	struct nl_msg *msg;
+	int ret = -1;
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		goto out;
+
+	genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+		    0, NL80211_CMD_SET_BEACON, 0);
+	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
+
+	NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
+
+	if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
+	    nl_wait_for_ack(drv->nl_handle) < 0)
+		goto out;
+
+	ret = 0;
+
+ out:
+ nla_put_failure:
+	nlmsg_free(msg);
+	return ret;
+}
+
+
+static int i802_set_dtim_period(const char *iface, void *priv, int value)
+{
+	struct i802_driver_data *drv = priv;
+	struct nl_msg *msg;
+	int ret = -1;
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		goto out;
+
+	genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+		    0, NL80211_CMD_SET_BEACON, 0);
+	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
+
+	drv->dtim_period = value;
+	NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
+
+	if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
+	    nl_wait_for_ack(drv->nl_handle) < 0)
+		goto out;
+
+	ret = 0;
+
+ out:
+ nla_put_failure:
+	nlmsg_free(msg);
+	return ret;
+}
+
+
+static int i802_set_cts_protect(void *priv, int value)
+{
+	return -1;
+}
+
+
+static int i802_set_preamble(void *priv, int value)
+{
+	return -1;
+}
+
+
+static int i802_set_short_slot_time(void *priv, int value)
+{
+	return -1;
+}
+
+
+static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
+{
+	switch (type) {
+	case HOSTAPD_IF_VLAN:
+		return NL80211_IFTYPE_AP_VLAN;
+	case HOSTAPD_IF_WDS:
+		return NL80211_IFTYPE_WDS;
+	}
+	return -1;
+}
+
+
+static int i802_if_add(const char *iface, void *priv,
+		       enum hostapd_driver_if_type type, char *ifname,
+		       const u8 *addr)
+{
+	if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
+		return -1;
+	return 0;
+}
+
+
+static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
+			  char *ifname, const u8 *addr)
+{
+	/* unused at the moment */
+	return -1;
+}
+
+
+static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
+			  const char *ifname, const u8 *addr)
+{
+	nl80211_remove_iface(priv, if_nametoindex(ifname));
+	return 0;
+}
+
+
+struct phy_info_arg {
+	u16 *num_modes;
+	struct hostapd_hw_modes *modes;
+	int error;
+};
+
+static int phy_info_handler(struct nl_msg *msg, void *arg)
+{
+	struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
+	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+	struct phy_info_arg *phy_info = arg;
+
+	struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
+
+	struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
+	static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
+		[NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
+		[NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
+		[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
+		[NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
+		[NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
+	};
+
+	struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
+	static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
+		[NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
+		[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
+	};
+
+	struct nlattr *nl_band;
+	struct nlattr *nl_freq;
+	struct nlattr *nl_rate;
+	int rem_band, rem_freq, rem_rate;
+	struct hostapd_hw_modes *mode;
+	int idx, mode_is_set;
+
+	nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
+		  genlmsg_attrlen(gnlh, 0), NULL);
+
+	if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
+		return NL_SKIP;
+
+	nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
+		mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
+		if (!mode)
+			return NL_SKIP;
+		phy_info->modes = mode;
+
+		mode_is_set = 0;
+
+		mode = &phy_info->modes[*(phy_info->num_modes)];
+		memset(mode, 0, sizeof(*mode));
+		*(phy_info->num_modes) += 1;
+
+		nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
+			  nla_len(nl_band), NULL);
+
+		nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
+			nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
+				  nla_len(nl_freq), freq_policy);
+			if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
+				continue;
+			mode->num_channels++;
+		}
+
+		mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
+		if (!mode->channels)
+			return NL_SKIP;
+
+		idx = 0;
+
+		nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
+			nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
+				  nla_len(nl_freq), freq_policy);
+			if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
+				continue;
+
+			mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
+			mode->channels[idx].flag |= HOSTAPD_CHAN_W_SCAN |
+						    HOSTAPD_CHAN_W_ACTIVE_SCAN |
+						    HOSTAPD_CHAN_W_IBSS;
+
+			if (!mode_is_set) {
+				/* crude heuristic */
+				if (mode->channels[idx].freq < 4000)
+					mode->mode = HOSTAPD_MODE_IEEE80211B;
+				else
+					mode->mode = HOSTAPD_MODE_IEEE80211A;
+				mode_is_set = 1;
+			}
+
+			/* crude heuristic */
+			if (mode->channels[idx].freq < 4000)
+				if (mode->channels[idx].freq == 2848)
+					mode->channels[idx].chan = 14;
+				else
+					mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
+			else
+				mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
+
+			if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
+				mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_SCAN;
+			if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
+				mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_ACTIVE_SCAN;
+			if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
+				mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_IBSS;
+			idx++;
+		}
+
+		nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
+			nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
+				  nla_len(nl_rate), rate_policy);
+			if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
+				continue;
+			mode->num_rates++;
+		}
+
+		mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
+		if (!mode->rates)
+			return NL_SKIP;
+
+		idx = 0;
+
+		nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
+			nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
+				  nla_len(nl_rate), rate_policy);
+			if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
+				continue;
+			mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
+
+			/* crude heuristic */
+			if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
+			    mode->rates[idx].rate > 200)
+				mode->mode = HOSTAPD_MODE_IEEE80211G;
+
+			if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
+				mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
+
+			idx++;
+		}
+	}
+
+	phy_info->error = 0;
+
+	return NL_SKIP;
+}
+
+static struct hostapd_hw_modes *i802_get_hw_feature_data(void *priv,
+							 u16 *num_modes,
+							 u16 *flags)
+{
+	struct i802_driver_data *drv = priv;
+	struct nl_msg *msg;
+	int err = -1;
+	struct nl_cb *cb = NULL;
+	int finished;
+	struct phy_info_arg result = {
+		.num_modes = num_modes,
+		.modes = NULL,
+		.error = 1,
+	};
+
+	*num_modes = 0;
+	*flags = 0;
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		return NULL;
+
+	genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+		    0, NL80211_CMD_GET_WIPHY, 0);
+
+	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
+
+	cb = nl_cb_alloc(NL_CB_CUSTOM);
+	if (!cb)
+		goto out;
+
+	if (nl_send_auto_complete(drv->nl_handle, msg) < 0)
+		goto out;
+
+	nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, phy_info_handler, &result);
+	nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_wait_handler, &finished);
+
+	err = nl_recvmsgs(drv->nl_handle, cb);
+
+	if (!finished)
+		err = nl_wait_for_ack(drv->nl_handle);
+
+	if (err < 0 || result.error) {
+		hostapd_free_hw_features(result.modes, *num_modes);
+		result.modes = NULL;
+	}
+
+ out:
+	nl_cb_put(cb);
+ nla_put_failure:
+	if (err)
+		fprintf(stderr, "failed to get information: %d\n", err);
+	nlmsg_free(msg);
+	return result.modes;
+}
+
+
+static int i802_set_sta_vlan(void *priv, const u8 *addr,
+			     const char *ifname, int vlan_id)
+{
+	struct i802_driver_data *drv = priv;
+	struct nl_msg *msg;
+	int ret = -1;
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		goto out;
+
+	genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+		    0, NL80211_CMD_SET_STATION, 0);
+
+	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
+		    if_nametoindex(drv->iface));
+	NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
+	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
+		    if_nametoindex(ifname));
+
+	ret = 0;
+
+	if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
+	    (errno = nl_wait_for_ack(drv->nl_handle) < 0)) {
+		ret = -1;
+	}
+
+ nla_put_failure:
+	nlmsg_free(msg);
+
+ out:
+	return ret;
+}
+
+
+static void handle_unknown_sta(struct hostapd_data *hapd, u8 *ta)
+{
+	struct sta_info *sta;
+
+	sta = ap_get_sta(hapd, ta);
+	if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
+		printf("Data/PS-poll frame from not associated STA "
+		       MACSTR "\n", MAC2STR(ta));
+		if (sta && (sta->flags & WLAN_STA_AUTH))
+			hostapd_sta_disassoc(
+				hapd, ta,
+				WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
+		else
+			hostapd_sta_deauth(
+				hapd, ta,
+				WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
+	}
+}
+
+
+static void handle_tx_callback(struct hostapd_data *hapd, u8 *buf, size_t len,
+			       int ok)
+{
+	struct ieee80211_hdr *hdr;
+	u16 fc, type, stype;
+	struct sta_info *sta;
+
+	hdr = (struct ieee80211_hdr *) buf;
+	fc = le_to_host16(hdr->frame_control);
+
+	type = WLAN_FC_GET_TYPE(fc);
+	stype = WLAN_FC_GET_STYPE(fc);
+
+	switch (type) {
+	case WLAN_FC_TYPE_MGMT:
+		wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
+			   ok ? "ACK" : "fail");
+		ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
+		break;
+	case WLAN_FC_TYPE_CTRL:
+		wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
+			   ok ? "ACK" : "fail");
+		break;
+	case WLAN_FC_TYPE_DATA:
+		wpa_printf(MSG_DEBUG, "DATA (TX callback) %s",
+			   ok ? "ACK" : "fail");
+		sta = ap_get_sta(hapd, hdr->addr1);
+		if (sta && sta->flags & WLAN_STA_PENDING_POLL) {
+			wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
+				   "activity poll", MAC2STR(sta->addr),
+				   ok ? "ACKed" : "did not ACK");
+			if (ok)
+				sta->flags &= ~WLAN_STA_PENDING_POLL;
+		}
+		if (sta)
+			ieee802_1x_tx_status(hapd, sta, buf, len, ok);
+		break;
+	default:
+		printf("unknown TX callback frame type %d\n", type);
+		break;
+	}
+}
+
+
+static void handle_frame(struct hostapd_iface *iface, u8 *buf, size_t len,
+			 struct hostapd_frame_info *hfi,
+			 enum ieee80211_msg_type msg_type)
+{
+	struct ieee80211_hdr *hdr;
+	u16 fc, type, stype;
+	size_t data_len = len;
+	struct hostapd_data *hapd = NULL;
+	int broadcast_bssid = 0;
+	size_t i;
+	u8 *bssid;
+
+	/*
+	 * PS-Poll frames are 16 bytes. All other frames are
+	 * 24 bytes or longer.
+	 */
+	if (len < 16)
+		return;
+
+	hdr = (struct ieee80211_hdr *) buf;
+	fc = le_to_host16(hdr->frame_control);
+
+	type = WLAN_FC_GET_TYPE(fc);
+	stype = WLAN_FC_GET_STYPE(fc);
+
+	switch (type) {
+	case WLAN_FC_TYPE_DATA:
+		if (len < 24)
+			return;
+		switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
+		case WLAN_FC_TODS:
+			bssid = hdr->addr1;
+			break;
+		default:
+			/* discard */
+			return;
+		}
+		break;
+	case WLAN_FC_TYPE_CTRL:
+		/* discard non-ps-poll frames */
+		if (stype != WLAN_FC_STYPE_PSPOLL)
+			return;
+		bssid = hdr->addr1;
+		break;
+	case WLAN_FC_TYPE_MGMT:
+		bssid = hdr->addr3;
+		break;
+	default:
+		/* discard */
+		return;
+	}
+
+	/* find interface frame belongs to */
+	for (i = 0; i < iface->num_bss; i++) {
+		if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
+			hapd = iface->bss[i];
+			break;
+		}
+	}
+
+	if (hapd == NULL) {
+		hapd = iface->bss[0];
+
+		if (bssid[0] != 0xff || bssid[1] != 0xff ||
+		    bssid[2] != 0xff || bssid[3] != 0xff ||
+		    bssid[4] != 0xff || bssid[5] != 0xff) {
+			/*
+			 * Unknown BSSID - drop frame if this is not from
+			 * passive scanning or a beacon (at least ProbeReq
+			 * frames to other APs may be allowed through RX
+			 * filtering in the wlan hw/driver)
+			 */
+			if ((type != WLAN_FC_TYPE_MGMT ||
+			     stype != WLAN_FC_STYPE_BEACON))
+				return;
+		} else
+			broadcast_bssid = 1;
+	}
+
+	switch (msg_type) {
+	case ieee80211_msg_normal:
+		/* continue processing */
+		break;
+	case ieee80211_msg_tx_callback_ack:
+		handle_tx_callback(hapd, buf, data_len, 1);
+		return;
+	case ieee80211_msg_tx_callback_fail:
+		handle_tx_callback(hapd, buf, data_len, 0);
+		return;
+	}
+
+	switch (type) {
+	case WLAN_FC_TYPE_MGMT:
+		if (stype != WLAN_FC_STYPE_BEACON &&
+		    stype != WLAN_FC_STYPE_PROBE_REQ)
+			wpa_printf(MSG_MSGDUMP, "MGMT");
+		if (broadcast_bssid) {
+			for (i = 0; i < iface->num_bss; i++)
+				ieee802_11_mgmt(iface->bss[i], buf, data_len,
+						stype, hfi);
+		} else
+			ieee802_11_mgmt(hapd, buf, data_len, stype, hfi);
+		break;
+	case WLAN_FC_TYPE_CTRL:
+		/* can only get here with PS-Poll frames */
+		wpa_printf(MSG_DEBUG, "CTRL");
+		handle_unknown_sta(hapd, hdr->addr2);
+		break;
+	case WLAN_FC_TYPE_DATA:
+		wpa_printf(MSG_DEBUG, "DATA");
+		handle_unknown_sta(hapd, hdr->addr2);
+		break;
+	}
+}
+
+
+static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
+{
+	struct i802_driver_data *drv = eloop_ctx;
+	struct hostapd_data *hapd = drv->hapd;
+	struct sockaddr_ll lladdr;
+	unsigned char buf[3000];
+	int len;
+	socklen_t fromlen = sizeof(lladdr);
+
+	len = recvfrom(sock, buf, sizeof(buf), 0,
+		       (struct sockaddr *)&lladdr, &fromlen);
+	if (len < 0) {
+		perror("recv");
+		return;
+	}
+
+	if (have_ifidx(drv, lladdr.sll_ifindex))
+		ieee802_1x_receive(hapd, lladdr.sll_addr, buf, len);
+}
+
+
+static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
+{
+	struct i802_driver_data *drv = eloop_ctx;
+	int len;
+	unsigned char buf[3000];
+	struct hostapd_data *hapd = drv->hapd;
+	struct ieee80211_radiotap_iterator iter;
+	int ret;
+	struct hostapd_frame_info hfi;
+	int injected = 0, failed = 0, msg_type, rxflags = 0;
+
+	len = recv(sock, buf, sizeof(buf), 0);
+	if (len < 0) {
+		perror("recv");
+		return;
+	}
+
+	if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
+		printf("received invalid radiotap frame\n");
+		return;
+	}
+
+	memset(&hfi, 0, sizeof(hfi));
+
+	while (1) {
+		ret = ieee80211_radiotap_iterator_next(&iter);
+		if (ret == -ENOENT)
+			break;
+		if (ret) {
+			printf("received invalid radiotap frame (%d)\n", ret);
+			return;
+		}
+		switch (iter.this_arg_index) {
+		case IEEE80211_RADIOTAP_FLAGS:
+			if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
+				len -= 4;
+			break;
+		case IEEE80211_RADIOTAP_RX_FLAGS:
+			rxflags = 1;
+			break;
+		case IEEE80211_RADIOTAP_TX_FLAGS:
+			injected = 1;
+			failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
+					IEEE80211_RADIOTAP_F_TX_FAIL;
+			break;
+		case IEEE80211_RADIOTAP_DATA_RETRIES:
+			break;
+		case IEEE80211_RADIOTAP_CHANNEL:
+			/* TODO convert from freq/flags to channel number
+			hfi.channel = XXX;
+			hfi.phytype = XXX;
+			 */
+			break;
+		case IEEE80211_RADIOTAP_RATE:
+			hfi.datarate = *iter.this_arg * 5;
+			break;
+		case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
+			hfi.ssi_signal = *iter.this_arg;
+			break;
+		}
+	}
+
+	if (rxflags && injected)
+		return;
+
+	if (!injected)
+		msg_type = ieee80211_msg_normal;
+	else if (failed)
+		msg_type = ieee80211_msg_tx_callback_fail;
+	else
+		msg_type = ieee80211_msg_tx_callback_ack;
+
+	handle_frame(hapd->iface, buf + iter.max_length,
+		     len - iter.max_length, &hfi, msg_type);
+}
+
+
+static int nl80211_create_monitor_interface(struct i802_driver_data *drv)
+{
+	char buf[IFNAMSIZ];
+	struct sockaddr_ll ll;
+	int optval;
+	socklen_t optlen;
+
+	snprintf(buf, IFNAMSIZ, "mon.%s", drv->iface);
+	buf[IFNAMSIZ - 1] = '\0';
+
+	drv->monitor_ifidx =
+		nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
+
+	if (drv->monitor_ifidx < 0)
+		return -1;
+
+	if (hostapd_set_iface_flags(drv, buf, 1))
+		goto error;
+
+	memset(&ll, 0, sizeof(ll));
+	ll.sll_family = AF_PACKET;
+	ll.sll_ifindex = drv->monitor_ifidx;
+	drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
+	if (drv->monitor_sock < 0) {
+		perror("socket[PF_PACKET,SOCK_RAW]");
+		goto error;
+	}
+
+	if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
+		 sizeof(ll)) < 0) {
+		perror("monitor socket bind");
+		goto error;
+	}
+
+	optlen = sizeof(optval);
+	optval = 20;
+	if (setsockopt
+	    (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
+		perror("Failed to set socket priority");
+		goto error;
+	}
+
+	if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
+				     drv, NULL)) {
+		printf("Could not register monitor read socket\n");
+		goto error;
+	}
+
+	return 0;
+ error:
+	nl80211_remove_iface(drv, drv->monitor_ifidx);
+	return -1;
+}
+
+
+static int nl80211_set_master_mode(struct i802_driver_data *drv,
+				   const char *ifname)
+{
+	struct nl_msg *msg;
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		return -1;
+
+	genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+		    0, NL80211_CMD_SET_INTERFACE, 0);
+	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
+		    if_nametoindex(ifname));
+	NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_AP);
+
+	if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
+	    nl_wait_for_ack(drv->nl_handle) < 0) {
+ nla_put_failure:
+		wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
+			   "mode.", ifname);
+		nlmsg_free(msg);
+		return -1;
+	}
+
+	nlmsg_free(msg);
+
+	return 0;
+}
+  
+
+static int i802_init_sockets(struct i802_driver_data *drv, const u8 *bssid)
+{
+	struct ifreq ifr;
+	struct sockaddr_ll addr;
+
+	drv->ioctl_sock = -1;
+
+	drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
+	if (drv->ioctl_sock < 0) {
+		perror("socket[PF_INET,SOCK_DGRAM]");
+		return -1;
+	}
+
+	/* start listening for EAPOL on the default AP interface */
+	add_ifidx(drv, if_nametoindex(drv->iface));
+
+	if (hostapd_set_iface_flags(drv, drv->iface, 0))
+		return -1;
+
+	if (bssid) {
+		os_strlcpy(ifr.ifr_name, drv->iface, IFNAMSIZ);
+		memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
+		ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
+
+		if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
+			perror("ioctl(SIOCSIFHWADDR)");
+			return -1;
+		}
+	}
+
+	/*
+	 * initialise generic netlink and nl80211
+	 */
+	drv->nl_handle = nl_handle_alloc();
+	if (!drv->nl_handle) {
+		printf("Failed to allocate netlink handle.\n");
+		return -1;
+	}
+
+	if (genl_connect(drv->nl_handle)) {
+		printf("Failed to connect to generic netlink.\n");
+		return -1;
+	}
+
+	drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
+	if (!drv->nl_cache) {
+		printf("Failed to allocate generic netlink cache.\n");
+		return -1;
+	}
+
+	drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
+	if (!drv->nl80211) {
+		printf("nl80211 not found.\n");
+		return -1;
+	}
+
+	/* Initialise a monitor interface */
+	if (nl80211_create_monitor_interface(drv))
+		return -1;
+
+	if (nl80211_set_master_mode(drv, drv->iface))
+		return -1;
+
+	if (hostapd_set_iface_flags(drv, drv->iface, 1))
+		return -1;
+
+	memset(&addr, 0, sizeof(addr));
+	addr.sll_family = AF_PACKET;
+	addr.sll_ifindex = ifr.ifr_ifindex;
+	wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
+		   addr.sll_ifindex);
+
+	drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
+	if (drv->eapol_sock < 0) {
+		perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
+		return -1;
+	}
+
+	if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
+	{
+		printf("Could not register read socket for eapol\n");
+		return -1;
+	}
+
+        memset(&ifr, 0, sizeof(ifr));
+        os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
+        if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
+		perror("ioctl(SIOCGIFHWADDR)");
+		return -1;
+        }
+
+	if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
+		printf("Invalid HW-addr family 0x%04x\n",
+		       ifr.ifr_hwaddr.sa_family);
+		return -1;
+	}
+	memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
+
+	return 0;
+}
+
+
+static int i802_get_inact_sec(void *priv, const u8 *addr)
+{
+	struct hostap_sta_driver_data data;
+	int ret;
+
+	data.inactive_msec = (unsigned long) -1;
+	ret = i802_read_sta_data(priv, &data, addr);
+	if (ret || data.inactive_msec == (unsigned long) -1)
+		return -1;
+	return data.inactive_msec / 1000;
+}
+
+
+static int i802_sta_clear_stats(void *priv, const u8 *addr)
+{
+#if 0
+	/* TODO */
+#endif
+	return 0;
+}
+
+
+static void
+hostapd_wireless_event_wireless_custom(struct i802_driver_data *drv,
+				       char *custom)
+{
+	wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);
+
+	if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
+		char *pos;
+		u8 addr[ETH_ALEN];
+		pos = strstr(custom, "addr=");
+		if (pos == NULL) {
+			wpa_printf(MSG_DEBUG,
+				   "MLME-MICHAELMICFAILURE.indication "
+				   "without sender address ignored");
+			return;
+		}
+		pos += 5;
+		if (hwaddr_aton(pos, addr) == 0) {
+			ieee80211_michael_mic_failure(drv->hapd, addr, 1);
+		} else {
+			wpa_printf(MSG_DEBUG,
+				   "MLME-MICHAELMICFAILURE.indication "
+				   "with invalid MAC address");
+		}
+	}
+}
+
+
+static void hostapd_wireless_event_wireless(struct i802_driver_data *drv,
+					    char *data, int len)
+{
+	struct iw_event iwe_buf, *iwe = &iwe_buf;
+	char *pos, *end, *custom, *buf;
+
+	pos = data;
+	end = data + len;
+
+	while (pos + IW_EV_LCP_LEN <= end) {
+		/* Event data may be unaligned, so make a local, aligned copy
+		 * before processing. */
+		memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
+		wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
+			   iwe->cmd, iwe->len);
+		if (iwe->len <= IW_EV_LCP_LEN)
+			return;
+
+		custom = pos + IW_EV_POINT_LEN;
+		if (drv->we_version > 18 &&
+		    (iwe->cmd == IWEVMICHAELMICFAILURE ||
+		     iwe->cmd == IWEVCUSTOM)) {
+			/* WE-19 removed the pointer from struct iw_point */
+			char *dpos = (char *) &iwe_buf.u.data.length;
+			int dlen = dpos - (char *) &iwe_buf;
+			memcpy(dpos, pos + IW_EV_LCP_LEN,
+			       sizeof(struct iw_event) - dlen);
+		} else {
+			memcpy(&iwe_buf, pos, sizeof(struct iw_event));
+			custom += IW_EV_POINT_OFF;
+		}
+
+		switch (iwe->cmd) {
+		case IWEVCUSTOM:
+			if (custom + iwe->u.data.length > end)
+				return;
+			buf = malloc(iwe->u.data.length + 1);
+			if (buf == NULL)
+				return;
+			memcpy(buf, custom, iwe->u.data.length);
+			buf[iwe->u.data.length] = '\0';
+			hostapd_wireless_event_wireless_custom(drv, buf);
+			free(buf);
+			break;
+		}
+
+		pos += iwe->len;
+	}
+}
+
+
+static void hostapd_wireless_event_rtm_newlink(struct i802_driver_data *drv,
+					       struct nlmsghdr *h, int len)
+{
+	struct ifinfomsg *ifi;
+	int attrlen, nlmsg_len, rta_len;
+	struct rtattr *attr;
+
+	if (len < (int) sizeof(*ifi))
+		return;
+
+	ifi = NLMSG_DATA(h);
+
+	/* TODO: use ifi->ifi_index to filter out wireless events from other
+	 * interfaces */
+
+	nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
+
+	attrlen = h->nlmsg_len - nlmsg_len;
+	if (attrlen < 0)
+		return;
+
+	attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
+
+	rta_len = RTA_ALIGN(sizeof(struct rtattr));
+	while (RTA_OK(attr, attrlen)) {
+		if (attr->rta_type == IFLA_WIRELESS) {
+			hostapd_wireless_event_wireless(
+				drv, ((char *) attr) + rta_len,
+				attr->rta_len - rta_len);
+		}
+		attr = RTA_NEXT(attr, attrlen);
+	}
+}
+
+
+static void hostapd_wireless_event_receive(int sock, void *eloop_ctx,
+					   void *sock_ctx)
+{
+	char buf[256];
+	int left;
+	struct sockaddr_nl from;
+	socklen_t fromlen;
+	struct nlmsghdr *h;
+	struct i802_driver_data *drv = eloop_ctx;
+
+	fromlen = sizeof(from);
+	left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
+			(struct sockaddr *) &from, &fromlen);
+	if (left < 0) {
+		if (errno != EINTR && errno != EAGAIN)
+			perror("recvfrom(netlink)");
+		return;
+	}
+
+	h = (struct nlmsghdr *) buf;
+	while (left >= (int) sizeof(*h)) {
+		int len, plen;
+
+		len = h->nlmsg_len;
+		plen = len - sizeof(*h);
+		if (len > left || plen < 0) {
+			printf("Malformed netlink message: "
+			       "len=%d left=%d plen=%d\n",
+			       len, left, plen);
+			break;
+		}
+
+		switch (h->nlmsg_type) {
+		case RTM_NEWLINK:
+			hostapd_wireless_event_rtm_newlink(drv, h, plen);
+			break;
+		}
+
+		len = NLMSG_ALIGN(len);
+		left -= len;
+		h = (struct nlmsghdr *) ((char *) h + len);
+	}
+
+	if (left > 0) {
+		printf("%d extra bytes in the end of netlink message\n", left);
+	}
+}
+
+
+static int hostap_get_we_version(struct i802_driver_data *drv)
+{
+	struct iw_range *range;
+	struct iwreq iwr;
+	int minlen;
+	size_t buflen;
+
+	drv->we_version = 0;
+
+	/*
+	 * Use larger buffer than struct iw_range in order to allow the
+	 * structure to grow in the future.
+	 */
+	buflen = sizeof(struct iw_range) + 500;
+	range = os_zalloc(buflen);
+	if (range == NULL)
+		return -1;
+
+	memset(&iwr, 0, sizeof(iwr));
+	os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
+	iwr.u.data.pointer = (caddr_t) range;
+	iwr.u.data.length = buflen;
+
+	minlen = ((char *) &range->enc_capa) - (char *) range +
+		sizeof(range->enc_capa);
+
+	if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
+		perror("ioctl[SIOCGIWRANGE]");
+		free(range);
+		return -1;
+	} else if (iwr.u.data.length >= minlen &&
+		   range->we_version_compiled >= 18) {
+		wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
+			   "WE(source)=%d enc_capa=0x%x",
+			   range->we_version_compiled,
+			   range->we_version_source,
+			   range->enc_capa);
+		drv->we_version = range->we_version_compiled;
+	}
+
+	free(range);
+	return 0;
+}
+
+
+static int i802_wireless_event_init(void *priv)
+{
+	struct i802_driver_data *drv = priv;
+	int s;
+	struct sockaddr_nl local;
+
+	hostap_get_we_version(drv);
+
+	drv->wext_sock = -1;
+
+	s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+	if (s < 0) {
+		perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
+		return -1;
+	}
+
+	memset(&local, 0, sizeof(local));
+	local.nl_family = AF_NETLINK;
+	local.nl_groups = RTMGRP_LINK;
+	if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
+		perror("bind(netlink)");
+		close(s);
+		return -1;
+	}
+
+	eloop_register_read_sock(s, hostapd_wireless_event_receive, drv,
+				 NULL);
+	drv->wext_sock = s;
+
+	return 0;
+}
+
+
+static void i802_wireless_event_deinit(void *priv)
+{
+	struct i802_driver_data *drv = priv;
+	if (drv->wext_sock < 0)
+		return;
+	eloop_unregister_read_sock(drv->wext_sock);
+	close(drv->wext_sock);
+}
+
+
+static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
+{
+	struct i802_driver_data *drv = priv;
+	struct ieee80211_mgmt mgmt;
+
+	memset(&mgmt, 0, sizeof(mgmt));
+	mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
+					  WLAN_FC_STYPE_DEAUTH);
+	memcpy(mgmt.da, addr, ETH_ALEN);
+	memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
+	memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
+	mgmt.u.deauth.reason_code = host_to_le16(reason);
+	return i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
+				      sizeof(mgmt.u.deauth), 0);
+}
+
+
+static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
+{
+	struct i802_driver_data *drv = priv;
+	struct ieee80211_mgmt mgmt;
+
+	memset(&mgmt, 0, sizeof(mgmt));
+	mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
+					  WLAN_FC_STYPE_DISASSOC);
+	memcpy(mgmt.da, addr, ETH_ALEN);
+	memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
+	memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
+	mgmt.u.disassoc.reason_code = host_to_le16(reason);
+	return  i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
+				       sizeof(mgmt.u.disassoc), 0);
+}
+
+
+static void *i802_init_bssid(struct hostapd_data *hapd, const u8 *bssid)
+{
+	struct i802_driver_data *drv;
+
+	drv = os_zalloc(sizeof(struct i802_driver_data));
+	if (drv == NULL) {
+		printf("Could not allocate memory for i802 driver data\n");
+		return NULL;
+	}
+
+	drv->hapd = hapd;
+	memcpy(drv->iface, hapd->conf->iface, sizeof(drv->iface));
+
+	drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
+	drv->if_indices = drv->default_if_indices;
+
+	if (i802_init_sockets(drv, bssid))
+		goto failed;
+
+	return drv;
+
+failed:
+	free(drv);
+	return NULL;
+}
+
+
+static void *i802_init(struct hostapd_data *hapd)
+{
+	return i802_init_bssid(hapd, NULL);
+}
+
+
+static void i802_deinit(void *priv)
+{
+	struct i802_driver_data *drv = priv;
+
+	i802_del_beacon(drv);
+
+	/* remove monitor interface */
+	nl80211_remove_iface(drv, drv->monitor_ifidx);
+
+	(void) hostapd_set_iface_flags(drv, drv->iface, 0);
+
+	if (drv->monitor_sock >= 0) {
+		eloop_unregister_read_sock(drv->monitor_sock);
+		close(drv->monitor_sock);
+	}
+	if (drv->ioctl_sock >= 0)
+		close(drv->ioctl_sock);
+	if (drv->eapol_sock >= 0) {
+		eloop_unregister_read_sock(drv->eapol_sock);
+		close(drv->eapol_sock);
+	}
+
+	genl_family_put(drv->nl80211);
+	nl_cache_free(drv->nl_cache);
+	nl_handle_destroy(drv->nl_handle);
+
+	if (drv->if_indices != drv->default_if_indices)
+		free(drv->if_indices);
+
+	free(drv);
+}
+
+
+const struct wpa_driver_ops wpa_driver_nl80211_ops = {
+	.name = "nl80211",
+	.init = i802_init,
+//	.init_bssid = i802_init_bssid,
+	.deinit = i802_deinit,
+	.wireless_event_init = i802_wireless_event_init,
+	.wireless_event_deinit = i802_wireless_event_deinit,
+	.set_ieee8021x = i802_set_ieee8021x,
+	.set_privacy = i802_set_privacy,
+	.set_encryption = i802_set_encryption,
+	.get_seqnum = i802_get_seqnum,
+	.flush = i802_flush,
+	.read_sta_data = i802_read_sta_data,
+	.send_eapol = i802_send_eapol,
+	.sta_set_flags = i802_sta_set_flags,
+	.sta_deauth = i802_sta_deauth,
+	.sta_disassoc = i802_sta_disassoc,
+	.sta_remove = i802_sta_remove,
+	.set_ssid = i802_set_ssid,
+	.send_mgmt_frame = i802_send_mgmt_frame,
+	.sta_add = i802_sta_add,
+	.get_inact_sec = i802_get_inact_sec,
+	.sta_clear_stats = i802_sta_clear_stats,
+	.set_freq = i802_set_freq,
+	.set_rts = i802_set_rts,
+	.get_rts = i802_get_rts,
+	.set_frag = i802_set_frag,
+	.get_frag = i802_get_frag,
+	.set_retry = i802_set_retry,
+	.get_retry = i802_get_retry,
+	.set_rate_sets = i802_set_rate_sets,
+	.set_channel_flag = i802_set_channel_flag,
+	.set_regulatory_domain = i802_set_regulatory_domain,
+	.set_beacon = i802_set_beacon,
+	.set_internal_bridge = i802_set_internal_bridge,
+	.set_beacon_int = i802_set_beacon_int,
+	.set_dtim_period = i802_set_dtim_period,
+	.set_cts_protect = i802_set_cts_protect,
+	.set_preamble = i802_set_preamble,
+	.set_short_slot_time = i802_set_short_slot_time,
+	.set_tx_queue_params = i802_set_tx_queue_params,
+	.bss_add = i802_bss_add,
+	.bss_remove = i802_bss_remove,
+	.if_add = i802_if_add,
+	.if_update = i802_if_update,
+	.if_remove = i802_if_remove,
+	.get_hw_feature_data = i802_get_hw_feature_data,
+	.set_sta_vlan = i802_set_sta_vlan,
+};
diff --git a/package/hostapd/files/mini.config b/package/hostapd/files/mini.config
index d1ab057ccc..0d13b1ed45 100644
--- a/package/hostapd/files/mini.config
+++ b/package/hostapd/files/mini.config
@@ -22,6 +22,14 @@ CONFIG_DRIVER_MADWIFI=y
 # Driver interface for Prism54 driver
 #CONFIG_DRIVER_PRISM54=y
 
+# Driver interface for drivers using the nl80211 kernel interface
+CONFIG_DRIVER_NL80211=y
+# driver_nl80211.c requires a rather new libnl, probably not
+# shipped with your distribution yet
+#LIBNL=/usr/src/libnl
+#CFLAGS += -I$(LIBNL)/include
+#LIBS += -L$(LIBNL)/lib
+
 # Driver interface for drivers using Devicescape IEEE 802.11 stack
 #CONFIG_DRIVER_DEVICESCAPE=y
 # Currently, driver_devicescape.c build requires some additional parameters
diff --git a/package/hostapd/files/radiotap.c b/package/hostapd/files/radiotap.c
new file mode 100644
index 0000000000..804473fa4b
--- /dev/null
+++ b/package/hostapd/files/radiotap.c
@@ -0,0 +1,287 @@
+/*
+ * Radiotap parser
+ *
+ * Copyright 2007		Andy Green <andy@warmcat.com>
+ *
+ * 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.
+ *
+ * Alternatively, this software may be distributed under the terms of BSD
+ * license.
+ *
+ * See README and COPYING for more details.
+ *
+ *
+ * Modified for userspace by Johannes Berg <johannes@sipsolutions.net>
+ * I only modified some things on top to ease syncing should bugs be found.
+ */
+
+#include "includes.h"
+
+#include "common.h"
+#include "radiotap_iter.h"
+
+#define le16_to_cpu		le_to_host16
+#define le32_to_cpu		le_to_host32
+#define __le32			uint32_t
+#define ulong			unsigned long
+#define unlikely(cond)		(cond)
+#define get_unaligned(p)					\
+({								\
+	struct packed_dummy_struct {				\
+		typeof(*(p)) __val;				\
+	} __attribute__((packed)) *__ptr = (void *) (p);	\
+								\
+	__ptr->__val;						\
+})
+
+/* function prototypes and related defs are in radiotap_iter.h */
+
+/**
+ * ieee80211_radiotap_iterator_init - radiotap parser iterator initialization
+ * @iterator: radiotap_iterator to initialize
+ * @radiotap_header: radiotap header to parse
+ * @max_length: total length we can parse into (eg, whole packet length)
+ *
+ * Returns: 0 or a negative error code if there is a problem.
+ *
+ * This function initializes an opaque iterator struct which can then
+ * be passed to ieee80211_radiotap_iterator_next() to visit every radiotap
+ * argument which is present in the header.  It knows about extended
+ * present headers and handles them.
+ *
+ * How to use:
+ * call __ieee80211_radiotap_iterator_init() to init a semi-opaque iterator
+ * struct ieee80211_radiotap_iterator (no need to init the struct beforehand)
+ * checking for a good 0 return code.  Then loop calling
+ * __ieee80211_radiotap_iterator_next()... it returns either 0,
+ * -ENOENT if there are no more args to parse, or -EINVAL if there is a problem.
+ * The iterator's @this_arg member points to the start of the argument
+ * associated with the current argument index that is present, which can be
+ * found in the iterator's @this_arg_index member.  This arg index corresponds
+ * to the IEEE80211_RADIOTAP_... defines.
+ *
+ * Radiotap header length:
+ * You can find the CPU-endian total radiotap header length in
+ * iterator->max_length after executing ieee80211_radiotap_iterator_init()
+ * successfully.
+ *
+ * Alignment Gotcha:
+ * You must take care when dereferencing iterator.this_arg
+ * for multibyte types... the pointer is not aligned.  Use
+ * get_unaligned((type *)iterator.this_arg) to dereference
+ * iterator.this_arg for type "type" safely on all arches.
+ *
+ * Example code:
+ * See Documentation/networking/radiotap-headers.txt
+ */
+
+int ieee80211_radiotap_iterator_init(
+    struct ieee80211_radiotap_iterator *iterator,
+    struct ieee80211_radiotap_header *radiotap_header,
+    int max_length)
+{
+	/* Linux only supports version 0 radiotap format */
+	if (radiotap_header->it_version)
+		return -EINVAL;
+
+	/* sanity check for allowed length and radiotap length field */
+	if (max_length < le16_to_cpu(get_unaligned(&radiotap_header->it_len)))
+		return -EINVAL;
+
+	iterator->rtheader = radiotap_header;
+	iterator->max_length = le16_to_cpu(get_unaligned(
+						&radiotap_header->it_len));
+	iterator->arg_index = 0;
+	iterator->bitmap_shifter = le32_to_cpu(get_unaligned(
+						&radiotap_header->it_present));
+	iterator->arg = (u8 *)radiotap_header + sizeof(*radiotap_header);
+	iterator->this_arg = NULL;
+
+	/* find payload start allowing for extended bitmap(s) */
+
+	if (unlikely(iterator->bitmap_shifter & (1<<IEEE80211_RADIOTAP_EXT))) {
+		while (le32_to_cpu(get_unaligned((__le32 *)iterator->arg)) &
+				   (1<<IEEE80211_RADIOTAP_EXT)) {
+			iterator->arg += sizeof(u32);
+
+			/*
+			 * check for insanity where the present bitmaps
+			 * keep claiming to extend up to or even beyond the
+			 * stated radiotap header length
+			 */
+
+			if (((ulong)iterator->arg - (ulong)iterator->rtheader)
+			    > (ulong)iterator->max_length)
+				return -EINVAL;
+		}
+
+		iterator->arg += sizeof(u32);
+
+		/*
+		 * no need to check again for blowing past stated radiotap
+		 * header length, because ieee80211_radiotap_iterator_next
+		 * checks it before it is dereferenced
+		 */
+	}
+
+	/* we are all initialized happily */
+
+	return 0;
+}
+
+
+/**
+ * ieee80211_radiotap_iterator_next - return next radiotap parser iterator arg
+ * @iterator: radiotap_iterator to move to next arg (if any)
+ *
+ * Returns: 0 if there is an argument to handle,
+ * -ENOENT if there are no more args or -EINVAL
+ * if there is something else wrong.
+ *
+ * This function provides the next radiotap arg index (IEEE80211_RADIOTAP_*)
+ * in @this_arg_index and sets @this_arg to point to the
+ * payload for the field.  It takes care of alignment handling and extended
+ * present fields.  @this_arg can be changed by the caller (eg,
+ * incremented to move inside a compound argument like
+ * IEEE80211_RADIOTAP_CHANNEL).  The args pointed to are in
+ * little-endian format whatever the endianess of your CPU.
+ *
+ * Alignment Gotcha:
+ * You must take care when dereferencing iterator.this_arg
+ * for multibyte types... the pointer is not aligned.  Use
+ * get_unaligned((type *)iterator.this_arg) to dereference
+ * iterator.this_arg for type "type" safely on all arches.
+ */
+
+int ieee80211_radiotap_iterator_next(
+    struct ieee80211_radiotap_iterator *iterator)
+{
+
+	/*
+	 * small length lookup table for all radiotap types we heard of
+	 * starting from b0 in the bitmap, so we can walk the payload
+	 * area of the radiotap header
+	 *
+	 * There is a requirement to pad args, so that args
+	 * of a given length must begin at a boundary of that length
+	 * -- but note that compound args are allowed (eg, 2 x u16
+	 * for IEEE80211_RADIOTAP_CHANNEL) so total arg length is not
+	 * a reliable indicator of alignment requirement.
+	 *
+	 * upper nybble: content alignment for arg
+	 * lower nybble: content length for arg
+	 */
+
+	static const u8 rt_sizes[] = {
+		[IEEE80211_RADIOTAP_TSFT] = 0x88,
+		[IEEE80211_RADIOTAP_FLAGS] = 0x11,
+		[IEEE80211_RADIOTAP_RATE] = 0x11,
+		[IEEE80211_RADIOTAP_CHANNEL] = 0x24,
+		[IEEE80211_RADIOTAP_FHSS] = 0x22,
+		[IEEE80211_RADIOTAP_DBM_ANTSIGNAL] = 0x11,
+		[IEEE80211_RADIOTAP_DBM_ANTNOISE] = 0x11,
+		[IEEE80211_RADIOTAP_LOCK_QUALITY] = 0x22,
+		[IEEE80211_RADIOTAP_TX_ATTENUATION] = 0x22,
+		[IEEE80211_RADIOTAP_DB_TX_ATTENUATION] = 0x22,
+		[IEEE80211_RADIOTAP_DBM_TX_POWER] = 0x11,
+		[IEEE80211_RADIOTAP_ANTENNA] = 0x11,
+		[IEEE80211_RADIOTAP_DB_ANTSIGNAL] = 0x11,
+		[IEEE80211_RADIOTAP_DB_ANTNOISE] = 0x11,
+		[IEEE80211_RADIOTAP_RX_FLAGS] = 0x22,
+		[IEEE80211_RADIOTAP_TX_FLAGS] = 0x22,
+		[IEEE80211_RADIOTAP_RTS_RETRIES] = 0x11,
+		[IEEE80211_RADIOTAP_DATA_RETRIES] = 0x11,
+		/*
+		 * add more here as they are defined in
+		 * include/net/ieee80211_radiotap.h
+		 */
+	};
+
+	/*
+	 * for every radiotap entry we can at
+	 * least skip (by knowing the length)...
+	 */
+
+	while (iterator->arg_index < (int) sizeof(rt_sizes)) {
+		int hit = 0;
+		int pad;
+
+		if (!(iterator->bitmap_shifter & 1))
+			goto next_entry; /* arg not present */
+
+		/*
+		 * arg is present, account for alignment padding
+		 *  8-bit args can be at any alignment
+		 * 16-bit args must start on 16-bit boundary
+		 * 32-bit args must start on 32-bit boundary
+		 * 64-bit args must start on 64-bit boundary
+		 *
+		 * note that total arg size can differ from alignment of
+		 * elements inside arg, so we use upper nybble of length
+		 * table to base alignment on
+		 *
+		 * also note: these alignments are ** relative to the
+		 * start of the radiotap header **.  There is no guarantee
+		 * that the radiotap header itself is aligned on any
+		 * kind of boundary.
+		 *
+		 * the above is why get_unaligned() is used to dereference
+		 * multibyte elements from the radiotap area
+		 */
+
+		pad = (((ulong)iterator->arg) -
+			((ulong)iterator->rtheader)) &
+			((rt_sizes[iterator->arg_index] >> 4) - 1);
+
+		if (pad)
+			iterator->arg +=
+				(rt_sizes[iterator->arg_index] >> 4) - pad;
+
+		/*
+		 * this is what we will return to user, but we need to
+		 * move on first so next call has something fresh to test
+		 */
+		iterator->this_arg_index = iterator->arg_index;
+		iterator->this_arg = iterator->arg;
+		hit = 1;
+
+		/* internally move on the size of this arg */
+		iterator->arg += rt_sizes[iterator->arg_index] & 0x0f;
+
+		/*
+		 * check for insanity where we are given a bitmap that
+		 * claims to have more arg content than the length of the
+		 * radiotap section.  We will normally end up equalling this
+		 * max_length on the last arg, never exceeding it.
+		 */
+
+		if (((ulong)iterator->arg - (ulong)iterator->rtheader) >
+		    (ulong) iterator->max_length)
+			return -EINVAL;
+
+	next_entry:
+		iterator->arg_index++;
+		if (unlikely((iterator->arg_index & 31) == 0)) {
+			/* completed current u32 bitmap */
+			if (iterator->bitmap_shifter & 1) {
+				/* b31 was set, there is more */
+				/* move to next u32 bitmap */
+				iterator->bitmap_shifter = le32_to_cpu(
+					get_unaligned(iterator->next_bitmap));
+				iterator->next_bitmap++;
+			} else
+				/* no more bitmaps: end */
+				iterator->arg_index = sizeof(rt_sizes);
+		} else /* just try the next bit */
+			iterator->bitmap_shifter >>= 1;
+
+		/* if we found a valid arg earlier, return it now */
+		if (hit)
+			return 0;
+	}
+
+	/* we don't know how to handle any more args, we're done */
+	return -ENOENT;
+}
diff --git a/package/hostapd/files/radiotap.h b/package/hostapd/files/radiotap.h
new file mode 100644
index 0000000000..508264c4cf
--- /dev/null
+++ b/package/hostapd/files/radiotap.h
@@ -0,0 +1,242 @@
+/* $FreeBSD: src/sys/net80211/ieee80211_radiotap.h,v 1.5 2005/01/22 20:12:05 sam Exp $ */
+/* $NetBSD: ieee80211_radiotap.h,v 1.11 2005/06/22 06:16:02 dyoung Exp $ */
+
+/*-
+ * Copyright (c) 2003, 2004 David Young.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of David Young may not be used to endorse or promote
+ *    products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY DAVID YOUNG ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL DAVID
+ * YOUNG BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ */
+
+/*
+ * Modifications to fit into the linux IEEE 802.11 stack,
+ * Mike Kershaw (dragorn@kismetwireless.net)
+ */
+
+#ifndef IEEE80211RADIOTAP_H
+#define IEEE80211RADIOTAP_H
+
+#include <stdint.h>
+
+/* Base version of the radiotap packet header data */
+#define PKTHDR_RADIOTAP_VERSION		0
+
+/* A generic radio capture format is desirable. There is one for
+ * Linux, but it is neither rigidly defined (there were not even
+ * units given for some fields) nor easily extensible.
+ *
+ * I suggest the following extensible radio capture format. It is
+ * based on a bitmap indicating which fields are present.
+ *
+ * I am trying to describe precisely what the application programmer
+ * should expect in the following, and for that reason I tell the
+ * units and origin of each measurement (where it applies), or else I
+ * use sufficiently weaselly language ("is a monotonically nondecreasing
+ * function of...") that I cannot set false expectations for lawyerly
+ * readers.
+ */
+
+/* The radio capture header precedes the 802.11 header.
+ * All data in the header is little endian on all platforms.
+ */
+struct ieee80211_radiotap_header {
+	uint8_t it_version;	/* Version 0. Only increases
+				 * for drastic changes,
+				 * introduction of compatible
+				 * new fields does not count.
+				 */
+	uint8_t it_pad;
+	uint16_t it_len;	/* length of the whole
+				 * header in bytes, including
+				 * it_version, it_pad,
+				 * it_len, and data fields.
+				 */
+	uint32_t it_present;	/* A bitmap telling which
+				 * fields are present. Set bit 31
+				 * (0x80000000) to extend the
+				 * bitmap by another 32 bits.
+				 * Additional extensions are made
+				 * by setting bit 31.
+				 */
+};
+
+/* Name                                 Data type    Units
+ * ----                                 ---------    -----
+ *
+ * IEEE80211_RADIOTAP_TSFT              __le64       microseconds
+ *
+ *      Value in microseconds of the MAC's 64-bit 802.11 Time
+ *      Synchronization Function timer when the first bit of the
+ *      MPDU arrived at the MAC. For received frames, only.
+ *
+ * IEEE80211_RADIOTAP_CHANNEL           2 x uint16_t   MHz, bitmap
+ *
+ *      Tx/Rx frequency in MHz, followed by flags (see below).
+ *
+ * IEEE80211_RADIOTAP_FHSS              uint16_t       see below
+ *
+ *      For frequency-hopping radios, the hop set (first byte)
+ *      and pattern (second byte).
+ *
+ * IEEE80211_RADIOTAP_RATE              u8           500kb/s
+ *
+ *      Tx/Rx data rate
+ *
+ * IEEE80211_RADIOTAP_DBM_ANTSIGNAL     s8           decibels from
+ *                                                   one milliwatt (dBm)
+ *
+ *      RF signal power at the antenna, decibel difference from
+ *      one milliwatt.
+ *
+ * IEEE80211_RADIOTAP_DBM_ANTNOISE      s8           decibels from
+ *                                                   one milliwatt (dBm)
+ *
+ *      RF noise power at the antenna, decibel difference from one
+ *      milliwatt.
+ *
+ * IEEE80211_RADIOTAP_DB_ANTSIGNAL      u8           decibel (dB)
+ *
+ *      RF signal power at the antenna, decibel difference from an
+ *      arbitrary, fixed reference.
+ *
+ * IEEE80211_RADIOTAP_DB_ANTNOISE       u8           decibel (dB)
+ *
+ *      RF noise power at the antenna, decibel difference from an
+ *      arbitrary, fixed reference point.
+ *
+ * IEEE80211_RADIOTAP_LOCK_QUALITY      uint16_t       unitless
+ *
+ *      Quality of Barker code lock. Unitless. Monotonically
+ *      nondecreasing with "better" lock strength. Called "Signal
+ *      Quality" in datasheets.  (Is there a standard way to measure
+ *      this?)
+ *
+ * IEEE80211_RADIOTAP_TX_ATTENUATION    uint16_t       unitless
+ *
+ *      Transmit power expressed as unitless distance from max
+ *      power set at factory calibration.  0 is max power.
+ *      Monotonically nondecreasing with lower power levels.
+ *
+ * IEEE80211_RADIOTAP_DB_TX_ATTENUATION uint16_t       decibels (dB)
+ *
+ *      Transmit power expressed as decibel distance from max power
+ *      set at factory calibration.  0 is max power.  Monotonically
+ *      nondecreasing with lower power levels.
+ *
+ * IEEE80211_RADIOTAP_DBM_TX_POWER      s8           decibels from
+ *                                                   one milliwatt (dBm)
+ *
+ *      Transmit power expressed as dBm (decibels from a 1 milliwatt
+ *      reference). This is the absolute power level measured at
+ *      the antenna port.
+ *
+ * IEEE80211_RADIOTAP_FLAGS             u8           bitmap
+ *
+ *      Properties of transmitted and received frames. See flags
+ *      defined below.
+ *
+ * IEEE80211_RADIOTAP_ANTENNA           u8           antenna index
+ *
+ *      Unitless indication of the Rx/Tx antenna for this packet.
+ *      The first antenna is antenna 0.
+ *
+ * IEEE80211_RADIOTAP_RX_FLAGS          uint16_t       bitmap
+ *
+ *     Properties of received frames. See flags defined below.
+ *
+ * IEEE80211_RADIOTAP_TX_FLAGS          uint16_t       bitmap
+ *
+ *     Properties of transmitted frames. See flags defined below.
+ *
+ * IEEE80211_RADIOTAP_RTS_RETRIES       u8           data
+ *
+ *     Number of rts retries a transmitted frame used.
+ *
+ * IEEE80211_RADIOTAP_DATA_RETRIES      u8           data
+ *
+ *     Number of unicast retries a transmitted frame used.
+ *
+ */
+enum ieee80211_radiotap_type {
+	IEEE80211_RADIOTAP_TSFT = 0,
+	IEEE80211_RADIOTAP_FLAGS = 1,
+	IEEE80211_RADIOTAP_RATE = 2,
+	IEEE80211_RADIOTAP_CHANNEL = 3,
+	IEEE80211_RADIOTAP_FHSS = 4,
+	IEEE80211_RADIOTAP_DBM_ANTSIGNAL = 5,
+	IEEE80211_RADIOTAP_DBM_ANTNOISE = 6,
+	IEEE80211_RADIOTAP_LOCK_QUALITY = 7,
+	IEEE80211_RADIOTAP_TX_ATTENUATION = 8,
+	IEEE80211_RADIOTAP_DB_TX_ATTENUATION = 9,
+	IEEE80211_RADIOTAP_DBM_TX_POWER = 10,
+	IEEE80211_RADIOTAP_ANTENNA = 11,
+	IEEE80211_RADIOTAP_DB_ANTSIGNAL = 12,
+	IEEE80211_RADIOTAP_DB_ANTNOISE = 13,
+	IEEE80211_RADIOTAP_RX_FLAGS = 14,
+	IEEE80211_RADIOTAP_TX_FLAGS = 15,
+	IEEE80211_RADIOTAP_RTS_RETRIES = 16,
+	IEEE80211_RADIOTAP_DATA_RETRIES = 17,
+	IEEE80211_RADIOTAP_EXT = 31
+};
+
+/* Channel flags. */
+#define	IEEE80211_CHAN_TURBO	0x0010	/* Turbo channel */
+#define	IEEE80211_CHAN_CCK	0x0020	/* CCK channel */
+#define	IEEE80211_CHAN_OFDM	0x0040	/* OFDM channel */
+#define	IEEE80211_CHAN_2GHZ	0x0080	/* 2 GHz spectrum channel. */
+#define	IEEE80211_CHAN_5GHZ	0x0100	/* 5 GHz spectrum channel */
+#define	IEEE80211_CHAN_PASSIVE	0x0200	/* Only passive scan allowed */
+#define	IEEE80211_CHAN_DYN	0x0400	/* Dynamic CCK-OFDM channel */
+#define	IEEE80211_CHAN_GFSK	0x0800	/* GFSK channel (FHSS PHY) */
+
+/* For IEEE80211_RADIOTAP_FLAGS */
+#define	IEEE80211_RADIOTAP_F_CFP	0x01	/* sent/received
+						 * during CFP
+						 */
+#define	IEEE80211_RADIOTAP_F_SHORTPRE	0x02	/* sent/received
+						 * with short
+						 * preamble
+						 */
+#define	IEEE80211_RADIOTAP_F_WEP	0x04	/* sent/received
+						 * with WEP encryption
+						 */
+#define	IEEE80211_RADIOTAP_F_FRAG	0x08	/* sent/received
+						 * with fragmentation
+						 */
+#define	IEEE80211_RADIOTAP_F_FCS	0x10	/* frame includes FCS */
+#define	IEEE80211_RADIOTAP_F_DATAPAD	0x20	/* frame has padding between
+						 * 802.11 header and payload
+						 * (to 32-bit boundary)
+						 */
+/* For IEEE80211_RADIOTAP_RX_FLAGS */
+#define IEEE80211_RADIOTAP_F_RX_BADFCS	0x0001	/* frame failed crc check */
+
+/* For IEEE80211_RADIOTAP_TX_FLAGS */
+#define IEEE80211_RADIOTAP_F_TX_FAIL	0x0001	/* failed due to excessive
+						 * retries */
+#define IEEE80211_RADIOTAP_F_TX_CTS	0x0002	/* used cts 'protection' */
+#define IEEE80211_RADIOTAP_F_TX_RTS	0x0004	/* used rts/cts handshake */
+
+#endif				/* IEEE80211_RADIOTAP_H */
diff --git a/package/hostapd/files/radiotap_iter.h b/package/hostapd/files/radiotap_iter.h
new file mode 100644
index 0000000000..92a798a670
--- /dev/null
+++ b/package/hostapd/files/radiotap_iter.h
@@ -0,0 +1,41 @@
+#ifndef __RADIOTAP_ITER_H
+#define __RADIOTAP_ITER_H
+
+#include "radiotap.h"
+
+/* Radiotap header iteration
+ *   implemented in radiotap.c
+ */
+/**
+ * struct ieee80211_radiotap_iterator - tracks walk thru present radiotap args
+ * @rtheader: pointer to the radiotap header we are walking through
+ * @max_length: length of radiotap header in cpu byte ordering
+ * @this_arg_index: IEEE80211_RADIOTAP_... index of current arg
+ * @this_arg: pointer to current radiotap arg
+ * @arg_index: internal next argument index
+ * @arg: internal next argument pointer
+ * @next_bitmap: internal pointer to next present u32
+ * @bitmap_shifter: internal shifter for curr u32 bitmap, b0 set == arg present
+ */
+
+struct ieee80211_radiotap_iterator {
+	struct ieee80211_radiotap_header *rtheader;
+	int max_length;
+	int this_arg_index;
+	unsigned char *this_arg;
+
+	int arg_index;
+	unsigned char *arg;
+	uint32_t *next_bitmap;
+	uint32_t bitmap_shifter;
+};
+
+extern int ieee80211_radiotap_iterator_init(
+   struct ieee80211_radiotap_iterator *iterator,
+   struct ieee80211_radiotap_header *radiotap_header,
+   int max_length);
+
+extern int ieee80211_radiotap_iterator_next(
+   struct ieee80211_radiotap_iterator *iterator);
+
+#endif /* __RADIOTAP_ITER_H */