Add HostAP wireless driver.

Includes minor cleanups from Adrian Bunk <bunk@stusta.de>.

1 files changed, 3286 insertions, 0 deletions

diff --git a/drivers/net/wireless/hostap/hostap_ap.c b/drivers/net/wireless/hostap/hostap_ap.c
new file mode 100644
index 000000000000..b9684e3a568b
--- /dev/null
+++ b/drivers/net/wireless/hostap/hostap_ap.c
@@ -0,0 +1,3286 @@
+/*
+ * Intersil Prism2 driver with Host AP (software access point) support
+ * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
+ * <jkmaline@cc.hut.fi>
+ * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
+ *
+ * This file is to be included into hostap.c when S/W AP functionality is
+ * compiled.
+ *
+ * AP:  FIX:
+ * - if unicast Class 2 (assoc,reassoc,disassoc) frame received from
+ *   unauthenticated STA, send deauth. frame (8802.11: 5.5)
+ * - if unicast Class 3 (data with to/from DS,deauth,pspoll) frame received
+ *   from authenticated, but unassoc STA, send disassoc frame (8802.11: 5.5)
+ * - if unicast Class 3 received from unauthenticated STA, send deauth. frame
+ *   (8802.11: 5.5)
+ */
+
+static int other_ap_policy[MAX_PARM_DEVICES] = { AP_OTHER_AP_SKIP_ALL,
+						 DEF_INTS };
+module_param_array(other_ap_policy, int, NULL, 0444);
+MODULE_PARM_DESC(other_ap_policy, "Other AP beacon monitoring policy (0-3)");
+
+static int ap_max_inactivity[MAX_PARM_DEVICES] = { AP_MAX_INACTIVITY_SEC,
+						   DEF_INTS };
+module_param_array(ap_max_inactivity, int, NULL, 0444);
+MODULE_PARM_DESC(ap_max_inactivity, "AP timeout (in seconds) for station "
+		 "inactivity");
+
+static int ap_bridge_packets[MAX_PARM_DEVICES] = { 1, DEF_INTS };
+module_param_array(ap_bridge_packets, int, NULL, 0444);
+MODULE_PARM_DESC(ap_bridge_packets, "Bridge packets directly between "
+		 "stations");
+
+static int autom_ap_wds[MAX_PARM_DEVICES] = { 0, DEF_INTS };
+module_param_array(autom_ap_wds, int, NULL, 0444);
+MODULE_PARM_DESC(autom_ap_wds, "Add WDS connections to other APs "
+		 "automatically");
+
+
+static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta);
+static void hostap_event_expired_sta(struct net_device *dev,
+				     struct sta_info *sta);
+static void handle_add_proc_queue(void *data);
+
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+static void handle_wds_oper_queue(void *data);
+static void prism2_send_mgmt(struct net_device *dev,
+			     int type, int subtype, char *body,
+			     int body_len, u8 *addr, u16 tx_cb_idx);
+#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
+
+
+#ifndef PRISM2_NO_PROCFS_DEBUG
+static int ap_debug_proc_read(char *page, char **start, off_t off,
+			      int count, int *eof, void *data)
+{
+	char *p = page;
+	struct ap_data *ap = (struct ap_data *) data;
+
+	if (off != 0) {
+		*eof = 1;
+		return 0;
+	}
+
+	p += sprintf(p, "BridgedUnicastFrames=%u\n", ap->bridged_unicast);
+	p += sprintf(p, "BridgedMulticastFrames=%u\n", ap->bridged_multicast);
+	p += sprintf(p, "max_inactivity=%u\n", ap->max_inactivity / HZ);
+	p += sprintf(p, "bridge_packets=%u\n", ap->bridge_packets);
+	p += sprintf(p, "nullfunc_ack=%u\n", ap->nullfunc_ack);
+	p += sprintf(p, "autom_ap_wds=%u\n", ap->autom_ap_wds);
+	p += sprintf(p, "auth_algs=%u\n", ap->local->auth_algs);
+	p += sprintf(p, "tx_drop_nonassoc=%u\n", ap->tx_drop_nonassoc);
+
+	return (p - page);
+}
+#endif /* PRISM2_NO_PROCFS_DEBUG */
+
+
+static void ap_sta_hash_add(struct ap_data *ap, struct sta_info *sta)
+{
+	sta->hnext = ap->sta_hash[STA_HASH(sta->addr)];
+	ap->sta_hash[STA_HASH(sta->addr)] = sta;
+}
+
+static void ap_sta_hash_del(struct ap_data *ap, struct sta_info *sta)
+{
+	struct sta_info *s;
+
+	s = ap->sta_hash[STA_HASH(sta->addr)];
+	if (s == NULL) return;
+	if (memcmp(s->addr, sta->addr, ETH_ALEN) == 0) {
+		ap->sta_hash[STA_HASH(sta->addr)] = s->hnext;
+		return;
+	}
+
+	while (s->hnext != NULL && memcmp(s->hnext->addr, sta->addr, ETH_ALEN)
+	       != 0)
+		s = s->hnext;
+	if (s->hnext != NULL)
+		s->hnext = s->hnext->hnext;
+	else
+		printk("AP: could not remove STA " MACSTR " from hash table\n",
+		       MAC2STR(sta->addr));
+}
+
+static void ap_free_sta(struct ap_data *ap, struct sta_info *sta)
+{
+	if (sta->ap && sta->local)
+		hostap_event_expired_sta(sta->local->dev, sta);
+
+	if (ap->proc != NULL) {
+		char name[20];
+		sprintf(name, MACSTR, MAC2STR(sta->addr));
+		remove_proc_entry(name, ap->proc);
+	}
+
+	if (sta->crypt) {
+		sta->crypt->ops->deinit(sta->crypt->priv);
+		kfree(sta->crypt);
+		sta->crypt = NULL;
+	}
+
+	skb_queue_purge(&sta->tx_buf);
+
+	ap->num_sta--;
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+	if (sta->aid > 0)
+		ap->sta_aid[sta->aid - 1] = NULL;
+
+	if (!sta->ap && sta->u.sta.challenge)
+		kfree(sta->u.sta.challenge);
+	del_timer(&sta->timer);
+#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
+
+	kfree(sta);
+}
+
+
+static void hostap_set_tim(local_info_t *local, int aid, int set)
+{
+	if (local->func->set_tim)
+		local->func->set_tim(local->dev, aid, set);
+}
+
+
+static void hostap_event_new_sta(struct net_device *dev, struct sta_info *sta)
+{
+	union iwreq_data wrqu;
+	memset(&wrqu, 0, sizeof(wrqu));
+	memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
+	wrqu.addr.sa_family = ARPHRD_ETHER;
+	wireless_send_event(dev, IWEVREGISTERED, &wrqu, NULL);
+}
+
+
+static void hostap_event_expired_sta(struct net_device *dev,
+				     struct sta_info *sta)
+{
+	union iwreq_data wrqu;
+	memset(&wrqu, 0, sizeof(wrqu));
+	memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
+	wrqu.addr.sa_family = ARPHRD_ETHER;
+	wireless_send_event(dev, IWEVEXPIRED, &wrqu, NULL);
+}
+
+
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+
+static void ap_handle_timer(unsigned long data)
+{
+	struct sta_info *sta = (struct sta_info *) data;
+	local_info_t *local;
+	struct ap_data *ap;
+	unsigned long next_time = 0;
+	int was_assoc;
+
+	if (sta == NULL || sta->local == NULL || sta->local->ap == NULL) {
+		PDEBUG(DEBUG_AP, "ap_handle_timer() called with NULL data\n");
+		return;
+	}
+
+	local = sta->local;
+	ap = local->ap;
+	was_assoc = sta->flags & WLAN_STA_ASSOC;
+
+	if (atomic_read(&sta->users) != 0)
+		next_time = jiffies + HZ;
+	else if ((sta->flags & WLAN_STA_PERM) && !(sta->flags & WLAN_STA_AUTH))
+		next_time = jiffies + ap->max_inactivity;
+
+	if (time_before(jiffies, sta->last_rx + ap->max_inactivity)) {
+		/* station activity detected; reset timeout state */
+		sta->timeout_next = STA_NULLFUNC;
+		next_time = sta->last_rx + ap->max_inactivity;
+	} else if (sta->timeout_next == STA_DISASSOC &&
+		   !(sta->flags & WLAN_STA_PENDING_POLL)) {
+		/* STA ACKed data nullfunc frame poll */
+		sta->timeout_next = STA_NULLFUNC;
+		next_time = jiffies + ap->max_inactivity;
+	}
+
+	if (next_time) {
+		sta->timer.expires = next_time;
+		add_timer(&sta->timer);
+		return;
+	}
+
+	if (sta->ap)
+		sta->timeout_next = STA_DEAUTH;
+
+	if (sta->timeout_next == STA_DEAUTH && !(sta->flags & WLAN_STA_PERM)) {
+		spin_lock(&ap->sta_table_lock);
+		ap_sta_hash_del(ap, sta);
+		list_del(&sta->list);
+		spin_unlock(&ap->sta_table_lock);
+		sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
+	} else if (sta->timeout_next == STA_DISASSOC)
+		sta->flags &= ~WLAN_STA_ASSOC;
+
+	if (was_assoc && !(sta->flags & WLAN_STA_ASSOC) && !sta->ap)
+		hostap_event_expired_sta(local->dev, sta);
+
+	if (sta->timeout_next == STA_DEAUTH && sta->aid > 0 &&
+	    !skb_queue_empty(&sta->tx_buf)) {
+		hostap_set_tim(local, sta->aid, 0);
+		sta->flags &= ~WLAN_STA_TIM;
+	}
+
+	if (sta->ap) {
+		if (ap->autom_ap_wds) {
+			PDEBUG(DEBUG_AP, "%s: removing automatic WDS "
+			       "connection to AP " MACSTR "\n",
+			       local->dev->name, MAC2STR(sta->addr));
+			hostap_wds_link_oper(local, sta->addr, WDS_DEL);
+		}
+	} else if (sta->timeout_next == STA_NULLFUNC) {
+		/* send data frame to poll STA and check whether this frame
+		 * is ACKed */
+		/* FIX: WLAN_FC_STYPE_NULLFUNC would be more appropriate, but
+		 * it is apparently not retried so TX Exc events are not
+		 * received for it */
+		sta->flags |= WLAN_STA_PENDING_POLL;
+		prism2_send_mgmt(local->dev, WLAN_FC_TYPE_DATA,
+				 WLAN_FC_STYPE_DATA, NULL, 0,
+				 sta->addr, ap->tx_callback_poll);
+	} else {
+		int deauth = sta->timeout_next == STA_DEAUTH;
+		u16 resp;
+		PDEBUG(DEBUG_AP, "%s: sending %s info to STA " MACSTR
+		       "(last=%lu, jiffies=%lu)\n",
+		       local->dev->name,
+		       deauth ? "deauthentication" : "disassociation",
+		       MAC2STR(sta->addr), sta->last_rx, jiffies);
+
+		resp = cpu_to_le16(deauth ? WLAN_REASON_PREV_AUTH_NOT_VALID :
+				   WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
+		prism2_send_mgmt(local->dev, WLAN_FC_TYPE_MGMT,
+				 (deauth ? WLAN_FC_STYPE_DEAUTH :
+				  WLAN_FC_STYPE_DISASSOC),
+				 (char *) &resp, 2, sta->addr, 0);
+	}
+
+	if (sta->timeout_next == STA_DEAUTH) {
+		if (sta->flags & WLAN_STA_PERM) {
+			PDEBUG(DEBUG_AP, "%s: STA " MACSTR " would have been "
+			       "removed, but it has 'perm' flag\n",
+			       local->dev->name, MAC2STR(sta->addr));
+		} else
+			ap_free_sta(ap, sta);
+		return;
+	}
+
+	if (sta->timeout_next == STA_NULLFUNC) {
+		sta->timeout_next = STA_DISASSOC;
+		sta->timer.expires = jiffies + AP_DISASSOC_DELAY;
+	} else {
+		sta->timeout_next = STA_DEAUTH;
+		sta->timer.expires = jiffies + AP_DEAUTH_DELAY;
+	}
+
+	add_timer(&sta->timer);
+}
+
+
+void hostap_deauth_all_stas(struct net_device *dev, struct ap_data *ap,
+			    int resend)
+{
+	u8 addr[ETH_ALEN];
+	u16 resp;
+	int i;
+
+	PDEBUG(DEBUG_AP, "%s: Deauthenticate all stations\n", dev->name);
+	memset(addr, 0xff, ETH_ALEN);
+
+	resp = __constant_cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
+
+	/* deauth message sent; try to resend it few times; the message is
+	 * broadcast, so it may be delayed until next DTIM; there is not much
+	 * else we can do at this point since the driver is going to be shut
+	 * down */
+	for (i = 0; i < 5; i++) {
+		prism2_send_mgmt(dev, WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_DEAUTH,
+				 (char *) &resp, 2, addr, 0);
+
+		if (!resend || ap->num_sta <= 0)
+			return;
+
+		mdelay(50);
+	}
+}
+
+
+static int ap_control_proc_read(char *page, char **start, off_t off,
+				int count, int *eof, void *data)
+{
+	char *p = page;
+	struct ap_data *ap = (struct ap_data *) data;
+	char *policy_txt;
+	struct list_head *ptr;
+	struct mac_entry *entry;
+
+	if (off != 0) {
+		*eof = 1;
+		return 0;
+	}
+
+	switch (ap->mac_restrictions.policy) {
+	case MAC_POLICY_OPEN:
+		policy_txt = "open";
+		break;
+	case MAC_POLICY_ALLOW:
+		policy_txt = "allow";
+		break;
+	case MAC_POLICY_DENY:
+		policy_txt = "deny";
+		break;
+	default:
+		policy_txt = "unknown";
+		break;
+	};
+	p += sprintf(p, "MAC policy: %s\n", policy_txt);
+	p += sprintf(p, "MAC entries: %u\n", ap->mac_restrictions.entries);
+	p += sprintf(p, "MAC list:\n");
+	spin_lock_bh(&ap->mac_restrictions.lock);
+	for (ptr = ap->mac_restrictions.mac_list.next;
+	     ptr != &ap->mac_restrictions.mac_list; ptr = ptr->next) {
+		if (p - page > PAGE_SIZE - 80) {
+			p += sprintf(p, "All entries did not fit one page.\n");
+			break;
+		}
+
+		entry = list_entry(ptr, struct mac_entry, list);
+		p += sprintf(p, MACSTR "\n", MAC2STR(entry->addr));
+	}
+	spin_unlock_bh(&ap->mac_restrictions.lock);
+
+	return (p - page);
+}
+
+
+static int ap_control_add_mac(struct mac_restrictions *mac_restrictions,
+			      u8 *mac)
+{
+	struct mac_entry *entry;
+
+	entry = kmalloc(sizeof(struct mac_entry), GFP_KERNEL);
+	if (entry == NULL)
+		return -1;
+
+	memcpy(entry->addr, mac, ETH_ALEN);
+
+	spin_lock_bh(&mac_restrictions->lock);
+	list_add_tail(&entry->list, &mac_restrictions->mac_list);
+	mac_restrictions->entries++;
+	spin_unlock_bh(&mac_restrictions->lock);
+
+	return 0;
+}
+
+
+static int ap_control_del_mac(struct mac_restrictions *mac_restrictions,
+			      u8 *mac)
+{
+	struct list_head *ptr;
+	struct mac_entry *entry;
+
+	spin_lock_bh(&mac_restrictions->lock);
+	for (ptr = mac_restrictions->mac_list.next;
+	     ptr != &mac_restrictions->mac_list; ptr = ptr->next) {
+		entry = list_entry(ptr, struct mac_entry, list);
+
+		if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
+			list_del(ptr);
+			kfree(entry);
+			mac_restrictions->entries--;
+			spin_unlock_bh(&mac_restrictions->lock);
+			return 0;
+		}
+	}
+	spin_unlock_bh(&mac_restrictions->lock);
+	return -1;
+}
+
+
+static int ap_control_mac_deny(struct mac_restrictions *mac_restrictions,
+			       u8 *mac)
+{
+	struct list_head *ptr;
+	struct mac_entry *entry;
+	int found = 0;
+
+	if (mac_restrictions->policy == MAC_POLICY_OPEN)
+		return 0;
+
+	spin_lock_bh(&mac_restrictions->lock);
+	for (ptr = mac_restrictions->mac_list.next;
+	     ptr != &mac_restrictions->mac_list; ptr = ptr->next) {
+		entry = list_entry(ptr, struct mac_entry, list);
+
+		if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
+			found = 1;
+			break;
+		}
+	}
+	spin_unlock_bh(&mac_restrictions->lock);
+
+	if (mac_restrictions->policy == MAC_POLICY_ALLOW)
+		return !found;
+	else
+		return found;
+}
+
+
+static void ap_control_flush_macs(struct mac_restrictions *mac_restrictions)
+{
+	struct list_head *ptr, *n;
+	struct mac_entry *entry;
+
+	if (mac_restrictions->entries == 0)
+		return;
+
+	spin_lock_bh(&mac_restrictions->lock);
+	for (ptr = mac_restrictions->mac_list.next, n = ptr->next;
+	     ptr != &mac_restrictions->mac_list;
+	     ptr = n, n = ptr->next) {
+		entry = list_entry(ptr, struct mac_entry, list);
+		list_del(ptr);
+		kfree(entry);
+	}
+	mac_restrictions->entries = 0;
+	spin_unlock_bh(&mac_restrictions->lock);
+}
+
+
+static int ap_control_kick_mac(struct ap_data *ap, struct net_device *dev,
+			       u8 *mac)
+{
+	struct sta_info *sta;
+	u16 resp;
+
+	spin_lock_bh(&ap->sta_table_lock);
+	sta = ap_get_sta(ap, mac);
+	if (sta) {
+		ap_sta_hash_del(ap, sta);
+		list_del(&sta->list);
+	}
+	spin_unlock_bh(&ap->sta_table_lock);
+
+	if (!sta)
+		return -EINVAL;
+
+	resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
+	prism2_send_mgmt(dev, WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_DEAUTH,
+			 (char *) &resp, 2, sta->addr, 0);
+
+	if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
+		hostap_event_expired_sta(dev, sta);
+
+	ap_free_sta(ap, sta);
+
+	return 0;
+}
+
+#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
+
+
+static void ap_control_kickall(struct ap_data *ap)
+{
+	struct list_head *ptr, *n;
+	struct sta_info *sta;
+  
+	spin_lock_bh(&ap->sta_table_lock);
+	for (ptr = ap->sta_list.next, n = ptr->next; ptr != &ap->sta_list;
+	     ptr = n, n = ptr->next) {
+		sta = list_entry(ptr, struct sta_info, list);
+		ap_sta_hash_del(ap, sta);
+		list_del(&sta->list);
+		if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
+			hostap_event_expired_sta(sta->local->dev, sta);
+		ap_free_sta(ap, sta);
+	}
+	spin_unlock_bh(&ap->sta_table_lock);
+}
+
+
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+
+#define PROC_LIMIT (PAGE_SIZE - 80)
+
+static int prism2_ap_proc_read(char *page, char **start, off_t off,
+			       int count, int *eof, void *data)
+{
+	char *p = page;
+	struct ap_data *ap = (struct ap_data *) data;
+	struct list_head *ptr;
+	int i;
+
+	if (off > PROC_LIMIT) {
+		*eof = 1;
+		return 0;
+	}
+
+	p += sprintf(p, "# BSSID CHAN SIGNAL NOISE RATE SSID FLAGS\n");
+	spin_lock_bh(&ap->sta_table_lock);
+	for (ptr = ap->sta_list.next; ptr != &ap->sta_list; ptr = ptr->next) {
+		struct sta_info *sta = (struct sta_info *) ptr;
+
+		if (!sta->ap)
+			continue;
+
+		p += sprintf(p, MACSTR " %d %d %d %d '", MAC2STR(sta->addr),
+			     sta->u.ap.channel, sta->last_rx_signal,
+			     sta->last_rx_silence, sta->last_rx_rate);
+		for (i = 0; i < sta->u.ap.ssid_len; i++)
+			p += sprintf(p, ((sta->u.ap.ssid[i] >= 32 &&
+					  sta->u.ap.ssid[i] < 127) ?
+					 "%c" : "<%02x>"),
+				     sta->u.ap.ssid[i]);
+		p += sprintf(p, "'");
+		if (sta->capability & WLAN_CAPABILITY_ESS)
+			p += sprintf(p, " [ESS]");
+		if (sta->capability & WLAN_CAPABILITY_IBSS)
+			p += sprintf(p, " [IBSS]");
+		if (sta->capability & WLAN_CAPABILITY_PRIVACY)
+			p += sprintf(p, " [WEP]");
+		p += sprintf(p, "\n");
+
+		if ((p - page) > PROC_LIMIT) {
+			printk(KERN_DEBUG "hostap: ap proc did not fit\n");
+			break;
+		}
+	}
+	spin_unlock_bh(&ap->sta_table_lock);
+
+	if ((p - page) <= off) {
+		*eof = 1;
+		return 0;
+	}
+
+	*start = page + off;
+
+	return (p - page - off);
+}
+#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
+
+
+void hostap_check_sta_fw_version(struct ap_data *ap, int sta_fw_ver)
+{
+	if (!ap)
+		return;
+
+	if (sta_fw_ver == PRISM2_FW_VER(0,8,0)) {
+		PDEBUG(DEBUG_AP, "Using data::nullfunc ACK workaround - "
+		       "firmware upgrade recommended\n");
+		ap->nullfunc_ack = 1;
+	} else
+		ap->nullfunc_ack = 0;
+
+	if (sta_fw_ver == PRISM2_FW_VER(1,4,2)) {
+		printk(KERN_WARNING "%s: Warning: secondary station firmware "
+		       "version 1.4.2 does not seem to work in Host AP mode\n",
+		       ap->local->dev->name);
+	}
+}
+
+
+/* Called only as a tasklet (software IRQ) */
+static void hostap_ap_tx_cb(struct sk_buff *skb, int ok, void *data)
+{
+	struct ap_data *ap = data;
+	u16 fc;
+	struct hostap_ieee80211_hdr *hdr;
+
+	if (!ap->local->hostapd || !ap->local->apdev) {
+		dev_kfree_skb(skb);
+		return;
+	}
+
+	hdr = (struct hostap_ieee80211_hdr *) skb->data;
+	fc = le16_to_cpu(hdr->frame_control);
+
+	/* Pass the TX callback frame to the hostapd; use 802.11 header version
+	 * 1 to indicate failure (no ACK) and 2 success (frame ACKed) */
+
+	fc &= ~WLAN_FC_PVER;
+	fc |= ok ? BIT(1) : BIT(0);
+	hdr->frame_control = cpu_to_le16(fc);
+
+	skb->dev = ap->local->apdev;
+	skb_pull(skb, hostap_80211_get_hdrlen(fc));
+	skb->pkt_type = PACKET_OTHERHOST;
+	skb->protocol = __constant_htons(ETH_P_802_2);
+	memset(skb->cb, 0, sizeof(skb->cb));
+	netif_rx(skb);
+}
+
+
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+/* Called only as a tasklet (software IRQ) */
+static void hostap_ap_tx_cb_auth(struct sk_buff *skb, int ok, void *data)
+{
+	struct ap_data *ap = data;
+	struct net_device *dev = ap->local->dev;
+	struct hostap_ieee80211_hdr *hdr;
+	u16 fc, *pos, auth_alg, auth_transaction, status;
+	struct sta_info *sta = NULL;
+	char *txt = NULL;
+
+	if (ap->local->hostapd) {
+		dev_kfree_skb(skb);
+		return;
+	}
+
+	hdr = (struct hostap_ieee80211_hdr *) skb->data;
+	fc = le16_to_cpu(hdr->frame_control);
+	if (WLAN_FC_GET_TYPE(fc) != WLAN_FC_TYPE_MGMT ||
+	    WLAN_FC_GET_STYPE(fc) != WLAN_FC_STYPE_AUTH ||
+	    skb->len < IEEE80211_MGMT_HDR_LEN + 6) {
+		printk(KERN_DEBUG "%s: hostap_ap_tx_cb_auth received invalid "
+		       "frame\n", dev->name);
+		dev_kfree_skb(skb);
+		return;
+	}
+
+	pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
+	auth_alg = le16_to_cpu(*pos++);
+	auth_transaction = le16_to_cpu(*pos++);
+	status = le16_to_cpu(*pos++);
+
+	if (!ok) {
+		txt = "frame was not ACKed";
+		goto done;
+	}
+
+	spin_lock(&ap->sta_table_lock);
+	sta = ap_get_sta(ap, hdr->addr1);
+	if (sta)
+		atomic_inc(&sta->users);
+	spin_unlock(&ap->sta_table_lock);
+
+	if (!sta) {
+		txt = "STA not found";
+		goto done;
+	}
+
+	if (status == WLAN_STATUS_SUCCESS &&
+	    ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
+	     (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
+		txt = "STA authenticated";
+		sta->flags |= WLAN_STA_AUTH;
+		sta->last_auth = jiffies;
+	} else if (status != WLAN_STATUS_SUCCESS)
+		txt = "authentication failed";
+
+ done:
+	if (sta)
+		atomic_dec(&sta->users);
+	if (txt) {
+		PDEBUG(DEBUG_AP, "%s: " MACSTR " auth_cb - alg=%d trans#=%d "
+		       "status=%d - %s\n",
+		       dev->name, MAC2STR(hdr->addr1), auth_alg,
+		       auth_transaction, status, txt);
+	}
+	dev_kfree_skb(skb);
+}
+
+
+/* Called only as a tasklet (software IRQ) */
+static void hostap_ap_tx_cb_assoc(struct sk_buff *skb, int ok, void *data)
+{
+	struct ap_data *ap = data;
+	struct net_device *dev = ap->local->dev;
+	struct hostap_ieee80211_hdr *hdr;
+	u16 fc, *pos, status;
+	struct sta_info *sta = NULL;
+	char *txt = NULL;
+
+	if (ap->local->hostapd) {
+		dev_kfree_skb(skb);
+		return;
+	}
+
+	hdr = (struct hostap_ieee80211_hdr *) skb->data;
+	fc = le16_to_cpu(hdr->frame_control);
+	if (WLAN_FC_GET_TYPE(fc) != WLAN_FC_TYPE_MGMT ||
+	    (WLAN_FC_GET_STYPE(fc) != WLAN_FC_STYPE_ASSOC_RESP &&
+	     WLAN_FC_GET_STYPE(fc) != WLAN_FC_STYPE_REASSOC_RESP) ||
+	    skb->len < IEEE80211_MGMT_HDR_LEN + 4) {
+		printk(KERN_DEBUG "%s: hostap_ap_tx_cb_assoc received invalid "
+		       "frame\n", dev->name);
+		dev_kfree_skb(skb);
+		return;
+	}
+
+	if (!ok) {
+		txt = "frame was not ACKed";
+		goto done;
+	}
+
+	spin_lock(&ap->sta_table_lock);
+	sta = ap_get_sta(ap, hdr->addr1);
+	if (sta)
+		atomic_inc(&sta->users);
+	spin_unlock(&ap->sta_table_lock);
+
+	if (!sta) {
+		txt = "STA not found";
+		goto done;
+	}
+
+	pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
+	pos++;
+	status = le16_to_cpu(*pos++);
+	if (status == WLAN_STATUS_SUCCESS) {
+		if (!(sta->flags & WLAN_STA_ASSOC))
+			hostap_event_new_sta(dev, sta);
+		txt = "STA associated";
+		sta->flags |= WLAN_STA_ASSOC;
+		sta->last_assoc = jiffies;
+	} else
+		txt = "association failed";
+
+ done:
+	if (sta)
+		atomic_dec(&sta->users);
+	if (txt) {
+		PDEBUG(DEBUG_AP, "%s: " MACSTR " assoc_cb - %s\n",
+		       dev->name, MAC2STR(hdr->addr1), txt);
+	}
+	dev_kfree_skb(skb);
+}
+
+/* Called only as a tasklet (software IRQ); TX callback for poll frames used
+ * in verifying whether the STA is still present. */
+static void hostap_ap_tx_cb_poll(struct sk_buff *skb, int ok, void *data)
+{
+	struct ap_data *ap = data;
+	struct hostap_ieee80211_hdr *hdr;
+	struct sta_info *sta;
+
+	if (skb->len < 24)
+		goto fail;
+	hdr = (struct hostap_ieee80211_hdr *) skb->data;
+	if (ok) {
+		spin_lock(&ap->sta_table_lock);
+		sta = ap_get_sta(ap, hdr->addr1);
+		if (sta)
+			sta->flags &= ~WLAN_STA_PENDING_POLL;
+		spin_unlock(&ap->sta_table_lock);
+	} else {
+		PDEBUG(DEBUG_AP, "%s: STA " MACSTR " did not ACK activity "
+		       "poll frame\n", ap->local->dev->name,
+		       MAC2STR(hdr->addr1));
+	}
+
+ fail:
+	dev_kfree_skb(skb);
+}
+#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
+
+
+void hostap_init_data(local_info_t *local)
+{
+	struct ap_data *ap = local->ap;
+
+	if (ap == NULL) {
+		printk(KERN_WARNING "hostap_init_data: ap == NULL\n");
+		return;
+	}
+	memset(ap, 0, sizeof(struct ap_data));
+	ap->local = local;
+
+	ap->ap_policy = GET_INT_PARM(other_ap_policy, local->card_idx);
+	ap->bridge_packets = GET_INT_PARM(ap_bridge_packets, local->card_idx);
+	ap->max_inactivity =
+		GET_INT_PARM(ap_max_inactivity, local->card_idx) * HZ;
+	ap->autom_ap_wds = GET_INT_PARM(autom_ap_wds, local->card_idx);
+
+	spin_lock_init(&ap->sta_table_lock);
+	INIT_LIST_HEAD(&ap->sta_list);
+
+	/* Initialize task queue structure for AP management */
+	INIT_WORK(&local->ap->add_sta_proc_queue, handle_add_proc_queue, ap);
+
+	ap->tx_callback_idx =
+		hostap_tx_callback_register(local, hostap_ap_tx_cb, ap);
+	if (ap->tx_callback_idx == 0)
+		printk(KERN_WARNING "%s: failed to register TX callback for "
+		       "AP\n", local->dev->name);
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+	INIT_WORK(&local->ap->wds_oper_queue, handle_wds_oper_queue, local);
+
+	ap->tx_callback_auth =
+		hostap_tx_callback_register(local, hostap_ap_tx_cb_auth, ap);
+	ap->tx_callback_assoc =
+		hostap_tx_callback_register(local, hostap_ap_tx_cb_assoc, ap);
+	ap->tx_callback_poll =
+		hostap_tx_callback_register(local, hostap_ap_tx_cb_poll, ap);
+	if (ap->tx_callback_auth == 0 || ap->tx_callback_assoc == 0 ||
+		ap->tx_callback_poll == 0)
+		printk(KERN_WARNING "%s: failed to register TX callback for "
+		       "AP\n", local->dev->name);
+
+	spin_lock_init(&ap->mac_restrictions.lock);
+	INIT_LIST_HEAD(&ap->mac_restrictions.mac_list);
+#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
+
+	ap->initialized = 1;
+}
+
+
+void hostap_init_ap_proc(local_info_t *local)
+{
+	struct ap_data *ap = local->ap;
+
+	ap->proc = local->proc;
+	if (ap->proc == NULL)
+		return;
+
+#ifndef PRISM2_NO_PROCFS_DEBUG
+	create_proc_read_entry("ap_debug", 0, ap->proc,
+			       ap_debug_proc_read, ap);
+#endif /* PRISM2_NO_PROCFS_DEBUG */
+
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+	create_proc_read_entry("ap_control", 0, ap->proc,
+			       ap_control_proc_read, ap);
+	create_proc_read_entry("ap", 0, ap->proc,
+			       prism2_ap_proc_read, ap);
+#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
+
+}
+
+
+void hostap_free_data(struct ap_data *ap)
+{
+	struct list_head *n, *ptr;
+
+	if (ap == NULL || !ap->initialized) {
+		printk(KERN_DEBUG "hostap_free_data: ap has not yet been "
+		       "initialized - skip resource freeing\n");
+		return;
+	}
+
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+	if (ap->crypt)
+		ap->crypt->deinit(ap->crypt_priv);
+	ap->crypt = ap->crypt_priv = NULL;
+#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
+
+	list_for_each_safe(ptr, n, &ap->sta_list) {
+		struct sta_info *sta = list_entry(ptr, struct sta_info, list);
+		ap_sta_hash_del(ap, sta);
+		list_del(&sta->list);
+		if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
+			hostap_event_expired_sta(sta->local->dev, sta);
+		ap_free_sta(ap, sta);
+	}
+
+#ifndef PRISM2_NO_PROCFS_DEBUG
+	if (ap->proc != NULL) {
+		remove_proc_entry("ap_debug", ap->proc);
+	}
+#endif /* PRISM2_NO_PROCFS_DEBUG */
+
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+	if (ap->proc != NULL) {
+	  remove_proc_entry("ap", ap->proc);
+		remove_proc_entry("ap_control", ap->proc);
+	}
+	ap_control_flush_macs(&ap->mac_restrictions);
+#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
+
+	ap->initialized = 0;
+}
+
+
+/* caller should have mutex for AP STA list handling */
+static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta)
+{
+	struct sta_info *s;
+
+	s = ap->sta_hash[STA_HASH(sta)];
+	while (s != NULL && memcmp(s->addr, sta, ETH_ALEN) != 0)
+		s = s->hnext;
+	return s;
+}
+
+
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+
+/* Called from timer handler and from scheduled AP queue handlers */
+static void prism2_send_mgmt(struct net_device *dev,
+			     int type, int subtype, char *body,
+			     int body_len, u8 *addr, u16 tx_cb_idx)
+{
+	struct hostap_interface *iface;
+	local_info_t *local;
+	struct hostap_ieee80211_hdr *hdr;
+	u16 fc;
+	struct sk_buff *skb;
+	struct hostap_skb_tx_data *meta;
+	int hdrlen;
+
+	iface = netdev_priv(dev);
+	local = iface->local;
+	dev = local->dev; /* always use master radio device */
+	iface = netdev_priv(dev);
+
+	if (!(dev->flags & IFF_UP)) {
+		PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt - device is not UP - "
+		       "cannot send frame\n", dev->name);
+		return;
+	}
+
+	skb = dev_alloc_skb(sizeof(*hdr) + body_len);
+	if (skb == NULL) {
+		PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt failed to allocate "
+		       "skb\n", dev->name);
+		return;
+	}
+
+	fc = (type << 2) | (subtype << 4);
+	hdrlen = hostap_80211_get_hdrlen(fc);
+	hdr = (struct hostap_ieee80211_hdr *) skb_put(skb, hdrlen);
+	if (body)
+		memcpy(skb_put(skb, body_len), body, body_len);
+
+	memset(hdr, 0, hdrlen);
+
+	/* FIX: ctrl::ack sending used special HFA384X_TX_CTRL_802_11
+	 * tx_control instead of using local->tx_control */
+
+
+	memcpy(hdr->addr1, addr, ETH_ALEN); /* DA / RA */
+	if (type == WLAN_FC_TYPE_DATA) {
+		fc |= WLAN_FC_FROMDS;
+		memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* BSSID */
+		memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* SA */
+	} else if (type == WLAN_FC_TYPE_CTRL) {
+		/* control:ACK does not have addr2 or addr3 */
+		memset(hdr->addr2, 0, ETH_ALEN);
+		memset(hdr->addr3, 0, ETH_ALEN);
+	} else {
+		memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* SA */
+		memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* BSSID */
+	}
+
+	hdr->frame_control = cpu_to_le16(fc);
+
+	meta = (struct hostap_skb_tx_data *) skb->cb;
+	memset(meta, 0, sizeof(*meta));
+	meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
+	meta->iface = iface;
+	meta->tx_cb_idx = tx_cb_idx;
+
+	skb->dev = dev;
+	skb->mac.raw = skb->nh.raw = skb->data;
+	dev_queue_xmit(skb);
+}
+#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
+
+
+static int prism2_sta_proc_read(char *page, char **start, off_t off,
+				int count, int *eof, void *data)
+{
+	char *p = page;
+	struct sta_info *sta = (struct sta_info *) data;
+	int i;
+
+	/* FIX: possible race condition.. the STA data could have just expired,
+	 * but proc entry was still here so that the read could have started;
+	 * some locking should be done here.. */
+
+	if (off != 0) {
+		*eof = 1;
+		return 0;
+	}
+
+	p += sprintf(p, "%s=" MACSTR "\nusers=%d\naid=%d\n"
+		     "flags=0x%04x%s%s%s%s%s%s%s\n"
+		     "capability=0x%02x\nlisten_interval=%d\nsupported_rates=",
+		     sta->ap ? "AP" : "STA",
+		     MAC2STR(sta->addr), atomic_read(&sta->users), sta->aid,
+		     sta->flags,
+		     sta->flags & WLAN_STA_AUTH ? " AUTH" : "",
+		     sta->flags & WLAN_STA_ASSOC ? " ASSOC" : "",
+		     sta->flags & WLAN_STA_PS ? " PS" : "",
+		     sta->flags & WLAN_STA_TIM ? " TIM" : "",
+		     sta->flags & WLAN_STA_PERM ? " PERM" : "",
+		     sta->flags & WLAN_STA_AUTHORIZED ? " AUTHORIZED" : "",
+		     sta->flags & WLAN_STA_PENDING_POLL ? " POLL" : "",
+		     sta->capability, sta->listen_interval);
+	/* supported_rates: 500 kbit/s units with msb ignored */
+	for (i = 0; i < sizeof(sta->supported_rates); i++)
+		if (sta->supported_rates[i] != 0)
+			p += sprintf(p, "%d%sMbps ",
+				     (sta->supported_rates[i] & 0x7f) / 2,
+				     sta->supported_rates[i] & 1 ? ".5" : "");
+	p += sprintf(p, "\njiffies=%lu\nlast_auth=%lu\nlast_assoc=%lu\n"
+		     "last_rx=%lu\nlast_tx=%lu\nrx_packets=%lu\n"
+		     "tx_packets=%lu\n"
+		     "rx_bytes=%lu\ntx_bytes=%lu\nbuffer_count=%d\n"
+		     "last_rx: silence=%d dBm signal=%d dBm rate=%d%s Mbps\n"
+		     "tx_rate=%d\ntx[1M]=%d\ntx[2M]=%d\ntx[5.5M]=%d\n"
+		     "tx[11M]=%d\n"
+		     "rx[1M]=%d\nrx[2M]=%d\nrx[5.5M]=%d\nrx[11M]=%d\n",
+		     jiffies, sta->last_auth, sta->last_assoc, sta->last_rx,
+		     sta->last_tx,
+		     sta->rx_packets, sta->tx_packets, sta->rx_bytes,
+		     sta->tx_bytes, skb_queue_len(&sta->tx_buf),
+		     sta->last_rx_silence,
+		     sta->last_rx_signal, sta->last_rx_rate / 10,
+		     sta->last_rx_rate % 10 ? ".5" : "",
+		     sta->tx_rate, sta->tx_count[0], sta->tx_count[1],
+		     sta->tx_count[2], sta->tx_count[3],  sta->rx_count[0],
+		     sta->rx_count[1], sta->rx_count[2], sta->rx_count[3]);
+	if (sta->crypt && sta->crypt->ops && sta->crypt->ops->print_stats)
+		p = sta->crypt->ops->print_stats(p, sta->crypt->priv);
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+	if (sta->ap) {
+		if (sta->u.ap.channel >= 0)
+			p += sprintf(p, "channel=%d\n", sta->u.ap.channel);
+		p += sprintf(p, "ssid=");
+		for (i = 0; i < sta->u.ap.ssid_len; i++)
+			p += sprintf(p, ((sta->u.ap.ssid[i] >= 32 &&
+					  sta->u.ap.ssid[i] < 127) ?
+					 "%c" : "<%02x>"),
+				     sta->u.ap.ssid[i]);
+		p += sprintf(p, "\n");
+	}
+#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
+
+	return (p - page);
+}
+
+
+static void handle_add_proc_queue(void *data)
+{
+	struct ap_data *ap = (struct ap_data *) data;
+	struct sta_info *sta;
+	char name[20];
+	struct add_sta_proc_data *entry, *prev;
+
+	entry = ap->add_sta_proc_entries;
+	ap->add_sta_proc_entries = NULL;
+
+	while (entry) {
+		spin_lock_bh(&ap->sta_table_lock);
+		sta = ap_get_sta(ap, entry->addr);
+		if (sta)
+			atomic_inc(&sta->users);
+		spin_unlock_bh(&ap->sta_table_lock);
+
+		if (sta) {
+			sprintf(name, MACSTR, MAC2STR(sta->addr));
+			sta->proc = create_proc_read_entry(
+				name, 0, ap->proc,
+				prism2_sta_proc_read, sta);
+
+			atomic_dec(&sta->users);
+		}
+
+		prev = entry;
+		entry = entry->next;
+		kfree(prev);
+	}
+}
+
+
+static struct sta_info * ap_add_sta(struct ap_data *ap, u8 *addr)
+{
+	struct sta_info *sta;
+
+	sta = (struct sta_info *)
+		kmalloc(sizeof(struct sta_info), GFP_ATOMIC);
+	if (sta == NULL) {
+		PDEBUG(DEBUG_AP, "AP: kmalloc failed\n");
+		return NULL;
+	}
+
+	/* initialize STA info data */
+	memset(sta, 0, sizeof(struct sta_info));
+	sta->local = ap->local;
+	skb_queue_head_init(&sta->tx_buf);
+	memcpy(sta->addr, addr, ETH_ALEN);
+
+	atomic_inc(&sta->users);
+	spin_lock_bh(&ap->sta_table_lock);
+	list_add(&sta->list, &ap->sta_list);
+	ap->num_sta++;
+	ap_sta_hash_add(ap, sta);
+	spin_unlock_bh(&ap->sta_table_lock);
+
+	if (ap->proc) {
+		struct add_sta_proc_data *entry;
+		/* schedule a non-interrupt context process to add a procfs
+		 * entry for the STA since procfs code use GFP_KERNEL */
+		entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
+		if (entry) {
+			memcpy(entry->addr, sta->addr, ETH_ALEN);
+			entry->next = ap->add_sta_proc_entries;
+			ap->add_sta_proc_entries = entry;
+			schedule_work(&ap->add_sta_proc_queue);
+		} else
+			printk(KERN_DEBUG "Failed to add STA proc data\n");
+	}
+
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+	init_timer(&sta->timer);
+	sta->timer.expires = jiffies + ap->max_inactivity;
+	sta->timer.data = (unsigned long) sta;
+	sta->timer.function = ap_handle_timer;
+	if (!ap->local->hostapd)
+		add_timer(&sta->timer);
+#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
+
+	return sta;
+}
+
+
+static int ap_tx_rate_ok(int rateidx, struct sta_info *sta,
+			 local_info_t *local)
+{
+	if (rateidx > sta->tx_max_rate ||
+	    !(sta->tx_supp_rates & (1 << rateidx)))
+		return 0;
+
+	if (local->tx_rate_control != 0 &&
+	    !(local->tx_rate_control & (1 << rateidx)))
+		return 0;
+
+	return 1;
+}
+
+
+static void prism2_check_tx_rates(struct sta_info *sta)
+{
+	int i;
+
+	sta->tx_supp_rates = 0;
+	for (i = 0; i < sizeof(sta->supported_rates); i++) {
+		if ((sta->supported_rates[i] & 0x7f) == 2)
+			sta->tx_supp_rates |= WLAN_RATE_1M;
+		if ((sta->supported_rates[i] & 0x7f) == 4)
+			sta->tx_supp_rates |= WLAN_RATE_2M;
+		if ((sta->supported_rates[i] & 0x7f) == 11)
+			sta->tx_supp_rates |= WLAN_RATE_5M5;
+		if ((sta->supported_rates[i] & 0x7f) == 22)
+			sta->tx_supp_rates |= WLAN_RATE_11M;
+	}
+	sta->tx_max_rate = sta->tx_rate = sta->tx_rate_idx = 0;
+	if (sta->tx_supp_rates & WLAN_RATE_1M) {
+		sta->tx_max_rate = 0;
+		if (ap_tx_rate_ok(0, sta, sta->local)) {
+			sta->tx_rate = 10;
+			sta->tx_rate_idx = 0;
+		}
+	}
+	if (sta->tx_supp_rates & WLAN_RATE_2M) {
+		sta->tx_max_rate = 1;
+		if (ap_tx_rate_ok(1, sta, sta->local)) {
+			sta->tx_rate = 20;
+			sta->tx_rate_idx = 1;
+		}
+	}
+	if (sta->tx_supp_rates & WLAN_RATE_5M5) {
+		sta->tx_max_rate = 2;
+		if (ap_tx_rate_ok(2, sta, sta->local)) {
+			sta->tx_rate = 55;
+			sta->tx_rate_idx = 2;
+		}
+	}
+	if (sta->tx_supp_rates & WLAN_RATE_11M) {
+		sta->tx_max_rate = 3;
+		if (ap_tx_rate_ok(3, sta, sta->local)) {
+			sta->tx_rate = 110;
+			sta->tx_rate_idx = 3;
+		}
+	}
+}
+
+
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+
+static void ap_crypt_init(struct ap_data *ap)
+{
+	ap->crypt = hostap_get_crypto_ops("WEP");
+
+	if (ap->crypt) {
+		if (ap->crypt->init) {
+			ap->crypt_priv = ap->crypt->init(0);
+			if (ap->crypt_priv == NULL)
+				ap->crypt = NULL;
+			else {
+				u8 key[WEP_KEY_LEN];
+				get_random_bytes(key, WEP_KEY_LEN);
+				ap->crypt->set_key(key, WEP_KEY_LEN, NULL,
+						   ap->crypt_priv);
+			}
+		}
+	}
+
+	if (ap->crypt == NULL) {
+		printk(KERN_WARNING "AP could not initialize WEP: load module "
+		       "hostap_crypt_wep.o\n");
+	}
+}
+
+
+/* Generate challenge data for shared key authentication. IEEE 802.11 specifies
+ * that WEP algorithm is used for generating challange. This should be unique,
+ * but otherwise there is not really need for randomness etc. Initialize WEP
+ * with pseudo random key and then use increasing IV to get unique challenge
+ * streams.
+ *
+ * Called only as a scheduled task for pending AP frames.
+ */
+static char * ap_auth_make_challenge(struct ap_data *ap)
+{
+	char *tmpbuf;
+	struct sk_buff *skb;
+
+	if (ap->crypt == NULL) {
+		ap_crypt_init(ap);
+		if (ap->crypt == NULL)
+			return NULL;
+	}
+
+	tmpbuf = (char *) kmalloc(WLAN_AUTH_CHALLENGE_LEN, GFP_ATOMIC);
+	if (tmpbuf == NULL) {
+		PDEBUG(DEBUG_AP, "AP: kmalloc failed for challenge\n");
+		return NULL;
+	}
+
+	skb = dev_alloc_skb(WLAN_AUTH_CHALLENGE_LEN +
+			    ap->crypt->extra_prefix_len +
+			    ap->crypt->extra_postfix_len);
+	if (skb == NULL) {
+		kfree(tmpbuf);
+		return NULL;
+	}
+
+	skb_reserve(skb, ap->crypt->extra_prefix_len);
+	memset(skb_put(skb, WLAN_AUTH_CHALLENGE_LEN), 0,
+	       WLAN_AUTH_CHALLENGE_LEN);
+	if (ap->crypt->encrypt_mpdu(skb, 0, ap->crypt_priv)) {
+		dev_kfree_skb(skb);
+		kfree(tmpbuf);
+		return NULL;
+	}
+
+	memcpy(tmpbuf, skb->data + ap->crypt->extra_prefix_len,
+	       WLAN_AUTH_CHALLENGE_LEN);
+	dev_kfree_skb(skb);
+
+	return tmpbuf;
+}
+
+
+/* Called only as a scheduled task for pending AP frames. */
+static void handle_authen(local_info_t *local, struct sk_buff *skb,
+			  struct hostap_80211_rx_status *rx_stats)
+{
+	struct net_device *dev = local->dev;
+	struct hostap_ieee80211_hdr *hdr =
+		(struct hostap_ieee80211_hdr *) skb->data;
+	size_t hdrlen;
+	struct ap_data *ap = local->ap;
+	char body[8 + WLAN_AUTH_CHALLENGE_LEN], *challenge = NULL;
+	int len, olen;
+	u16 auth_alg, auth_transaction, status_code, *pos;
+	u16 resp = WLAN_STATUS_SUCCESS, fc;
+	struct sta_info *sta = NULL;
+	struct prism2_crypt_data *crypt;
+	char *txt = "";
+
+	len = skb->len - IEEE80211_MGMT_HDR_LEN;
+
+	fc = le16_to_cpu(hdr->frame_control);
+	hdrlen = hostap_80211_get_hdrlen(fc);
+
+	if (len < 6) {
+		PDEBUG(DEBUG_AP, "%s: handle_authen - too short payload "
+		       "(len=%d) from " MACSTR "\n", dev->name, len,
+		       MAC2STR(hdr->addr2));
+		return;
+	}
+
+	spin_lock_bh(&local->ap->sta_table_lock);
+	sta = ap_get_sta(local->ap, hdr->addr2);
+	if (sta)
+		atomic_inc(&sta->users);
+	spin_unlock_bh(&local->ap->sta_table_lock);
+
+	if (sta && sta->crypt)
+		crypt = sta->crypt;
+	else {
+		int idx = 0;
+		if (skb->len >= hdrlen + 3)
+			idx = skb->data[hdrlen + 3] >> 6;
+		crypt = local->crypt[idx];
+	}
+
+	pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
+	auth_alg = __le16_to_cpu(*pos);
+	pos++;
+	auth_transaction = __le16_to_cpu(*pos);
+	pos++;
+	status_code = __le16_to_cpu(*pos);
+	pos++;
+
+	if (memcmp(dev->dev_addr, hdr->addr2, ETH_ALEN) == 0 ||
+	    ap_control_mac_deny(&ap->mac_restrictions, hdr->addr2)) {
+		txt = "authentication denied";
+		resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
+		goto fail;
+	}
+
+	if (((local->auth_algs & PRISM2_AUTH_OPEN) &&
+	     auth_alg == WLAN_AUTH_OPEN) ||
+	    ((local->auth_algs & PRISM2_AUTH_SHARED_KEY) &&
+	     crypt && auth_alg == WLAN_AUTH_SHARED_KEY)) {
+	} else {
+		txt = "unsupported algorithm";
+		resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
+		goto fail;
+	}
+
+	if (len >= 8) {
+		u8 *u = (u8 *) pos;
+		if (*u == WLAN_EID_CHALLENGE) {
+			if (*(u + 1) != WLAN_AUTH_CHALLENGE_LEN) {
+				txt = "invalid challenge len";
+				resp = WLAN_STATUS_CHALLENGE_FAIL;
+				goto fail;
+			}
+			if (len - 8 < WLAN_AUTH_CHALLENGE_LEN) {
+				txt = "challenge underflow";
+				resp = WLAN_STATUS_CHALLENGE_FAIL;
+				goto fail;
+			}
+			challenge = (char *) (u + 2);
+		}
+	}
+
+	if (sta && sta->ap) {
+		if (time_after(jiffies, sta->u.ap.last_beacon +
+			       (10 * sta->listen_interval * HZ) / 1024)) {
+			PDEBUG(DEBUG_AP, "%s: no beacons received for a while,"
+			       " assuming AP " MACSTR " is now STA\n",
+			       dev->name, MAC2STR(sta->addr));
+			sta->ap = 0;
+			sta->flags = 0;
+			sta->u.sta.challenge = NULL;
+		} else {
+			txt = "AP trying to authenticate?";
+			resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
+			goto fail;
+		}
+	}
+
+	if ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1) ||
+	    (auth_alg == WLAN_AUTH_SHARED_KEY &&
+	     (auth_transaction == 1 ||
+	      (auth_transaction == 3 && sta != NULL &&
+	       sta->u.sta.challenge != NULL)))) {
+	} else {
+		txt = "unknown authentication transaction number";
+		resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
+		goto fail;
+	}
+
+	if (sta == NULL) {
+		txt = "new STA";
+
+		if (local->ap->num_sta >= MAX_STA_COUNT) {
+			/* FIX: might try to remove some old STAs first? */
+			txt = "no more room for new STAs";
+			resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
+			goto fail;
+		}
+
+		sta = ap_add_sta(local->ap, hdr->addr2);
+		if (sta == NULL) {
+			txt = "ap_add_sta failed";
+			resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
+			goto fail;
+		}
+	}
+
+	switch (auth_alg) {
+	case WLAN_AUTH_OPEN:
+		txt = "authOK";
+		/* IEEE 802.11 standard is not completely clear about
+		 * whether STA is considered authenticated after
+		 * authentication OK frame has been send or after it
+		 * has been ACKed. In order to reduce interoperability
+		 * issues, mark the STA authenticated before ACK. */
+		sta->flags |= WLAN_STA_AUTH;
+		break;
+
+	case WLAN_AUTH_SHARED_KEY:
+		if (auth_transaction == 1) {
+			if (sta->u.sta.challenge == NULL) {
+				sta->u.sta.challenge =
+					ap_auth_make_challenge(local->ap);
+				if (sta->u.sta.challenge == NULL) {
+					resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
+					goto fail;
+				}
+			}
+		} else {
+			if (sta->u.sta.challenge == NULL ||
+			    challenge == NULL ||
+			    memcmp(sta->u.sta.challenge, challenge,
+				   WLAN_AUTH_CHALLENGE_LEN) != 0 ||
+			    !(fc & WLAN_FC_ISWEP)) {
+				txt = "challenge response incorrect";
+				resp = WLAN_STATUS_CHALLENGE_FAIL;
+				goto fail;
+			}
+
+			txt = "challenge OK - authOK";
+			/* IEEE 802.11 standard is not completely clear about
+			 * whether STA is considered authenticated after
+			 * authentication OK frame has been send or after it
+			 * has been ACKed. In order to reduce interoperability
+			 * issues, mark the STA authenticated before ACK. */
+			sta->flags |= WLAN_STA_AUTH;
+			kfree(sta->u.sta.challenge);
+			sta->u.sta.challenge = NULL;
+		}
+		break;
+	}
+
+ fail:
+	pos = (u16 *) body;
+	*pos = cpu_to_le16(auth_alg);
+	pos++;
+	*pos = cpu_to_le16(auth_transaction + 1);
+	pos++;
+	*pos = cpu_to_le16(resp); /* status_code */
+	pos++;
+	olen = 6;
+
+	if (resp == WLAN_STATUS_SUCCESS && sta != NULL &&
+	    sta->u.sta.challenge != NULL &&
+	    auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 1) {
+		u8 *tmp = (u8 *) pos;
+		*tmp++ = WLAN_EID_CHALLENGE;
+		*tmp++ = WLAN_AUTH_CHALLENGE_LEN;
+		pos++;
+		memcpy(pos, sta->u.sta.challenge, WLAN_AUTH_CHALLENGE_LEN);
+		olen += 2 + WLAN_AUTH_CHALLENGE_LEN;
+	}
+
+	prism2_send_mgmt(dev, WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_AUTH,
+			 body, olen, hdr->addr2, ap->tx_callback_auth);
+
+	if (sta) {
+		sta->last_rx = jiffies;
+		atomic_dec(&sta->users);
+	}
+
+	if (resp) {
+		PDEBUG(DEBUG_AP, "%s: " MACSTR " auth (alg=%d trans#=%d "
+		       "stat=%d len=%d fc=%04x) ==> %d (%s)\n",
+		       dev->name, MAC2STR(hdr->addr2), auth_alg,
+		       auth_transaction, status_code, len, fc, resp, txt);
+	}
+}
+
+
+/* Called only as a scheduled task for pending AP frames. */
+static void handle_assoc(local_info_t *local, struct sk_buff *skb,
+			 struct hostap_80211_rx_status *rx_stats, int reassoc)
+{
+	struct net_device *dev = local->dev;
+	struct hostap_ieee80211_hdr *hdr =
+		(struct hostap_ieee80211_hdr *) skb->data;
+	char body[12], *p, *lpos;
+	int len, left;
+	u16 *pos;
+	u16 resp = WLAN_STATUS_SUCCESS;
+	struct sta_info *sta = NULL;
+	int send_deauth = 0;
+	char *txt = "";
+	u8 prev_ap[ETH_ALEN];
+
+	left = len = skb->len - IEEE80211_MGMT_HDR_LEN;
+
+	if (len < (reassoc ? 10 : 4)) {
+		PDEBUG(DEBUG_AP, "%s: handle_assoc - too short payload "
+		       "(len=%d, reassoc=%d) from " MACSTR "\n",
+		       dev->name, len, reassoc, MAC2STR(hdr->addr2));
+		return;
+	}
+
+	spin_lock_bh(&local->ap->sta_table_lock);
+	sta = ap_get_sta(local->ap, hdr->addr2);
+	if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
+		spin_unlock_bh(&local->ap->sta_table_lock);
+		txt = "trying to associate before authentication";
+		send_deauth = 1;
+		resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
+		sta = NULL; /* do not decrement sta->users */
+		goto fail;
+	}
+	atomic_inc(&sta->users);
+	spin_unlock_bh(&local->ap->sta_table_lock);
+
+	pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
+	sta->capability = __le16_to_cpu(*pos);
+	pos++; left -= 2;
+	sta->listen_interval = __le16_to_cpu(*pos);
+	pos++; left -= 2;
+
+	if (reassoc) {
+		memcpy(prev_ap, pos, ETH_ALEN);
+		pos++; pos++; pos++; left -= 6;
+	} else
+		memset(prev_ap, 0, ETH_ALEN);
+
+	if (left >= 2) {
+		unsigned int ileft;
+		unsigned char *u = (unsigned char *) pos;
+
+		if (*u == WLAN_EID_SSID) {
+			u++; left--;
+			ileft = *u;
+			u++; left--;
+
+			if (ileft > left || ileft > MAX_SSID_LEN) {
+				txt = "SSID overflow";
+				resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
+				goto fail;
+			}
+
+			if (ileft != strlen(local->essid) ||
+			    memcmp(local->essid, u, ileft) != 0) {
+				txt = "not our SSID";
+				resp = WLAN_STATUS_ASSOC_DENIED_UNSPEC;
+				goto fail;
+			}
+
+			u += ileft;
+			left -= ileft;
+		}
+
+		if (left >= 2 && *u == WLAN_EID_SUPP_RATES) {
+			u++; left--;
+			ileft = *u;
+			u++; left--;
+			
+			if (ileft > left || ileft == 0 ||
+			    ileft > WLAN_SUPP_RATES_MAX) {
+				txt = "SUPP_RATES len error";
+				resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
+				goto fail;
+			}
+
+			memset(sta->supported_rates, 0,
+			       sizeof(sta->supported_rates));
+			memcpy(sta->supported_rates, u, ileft);
+			prism2_check_tx_rates(sta);
+
+			u += ileft;
+			left -= ileft;
+		}
+
+		if (left > 0) {
+			PDEBUG(DEBUG_AP, "%s: assoc from " MACSTR " with extra"
+			       " data (%d bytes) [",
+			       dev->name, MAC2STR(hdr->addr2), left);
+			while (left > 0) {
+				PDEBUG2(DEBUG_AP, "<%02x>", *u);
+				u++; left--;
+			}
+			PDEBUG2(DEBUG_AP, "]\n");
+		}
+	} else {
+		txt = "frame underflow";
+		resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
+		goto fail;
+	}
+
+	/* get a unique AID */
+	if (sta->aid > 0)
+		txt = "OK, old AID";
+	else {
+		spin_lock_bh(&local->ap->sta_table_lock);
+		for (sta->aid = 1; sta->aid <= MAX_AID_TABLE_SIZE; sta->aid++)
+			if (local->ap->sta_aid[sta->aid - 1] == NULL)
+				break;
+		if (sta->aid > MAX_AID_TABLE_SIZE) {
+			sta->aid = 0;
+			spin_unlock_bh(&local->ap->sta_table_lock);
+			resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
+			txt = "no room for more AIDs";
+		} else {
+			local->ap->sta_aid[sta->aid - 1] = sta;
+			spin_unlock_bh(&local->ap->sta_table_lock);
+			txt = "OK, new AID";
+		}
+	}
+
+ fail:
+	pos = (u16 *) body;
+
+	if (send_deauth) {
+		*pos = __constant_cpu_to_le16(
+			WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH);
+		pos++;
+	} else {
+		/* FIX: CF-Pollable and CF-PollReq should be set to match the
+		 * values in beacons/probe responses */
+		/* FIX: how about privacy and WEP? */
+		/* capability */
+		*pos = __constant_cpu_to_le16(WLAN_CAPABILITY_ESS);
+		pos++;
+
+		/* status_code */
+		*pos = __cpu_to_le16(resp);
+		pos++;
+
+		*pos = __cpu_to_le16((sta && sta->aid > 0 ? sta->aid : 0) |
+				     BIT(14) | BIT(15)); /* AID */
+		pos++;
+
+		/* Supported rates (Information element) */
+		p = (char *) pos;
+		*p++ = WLAN_EID_SUPP_RATES;
+		lpos = p;
+		*p++ = 0; /* len */
+		if (local->tx_rate_control & WLAN_RATE_1M) {
+			*p++ = local->basic_rates & WLAN_RATE_1M ? 0x82 : 0x02;
+			(*lpos)++;
+		}
+		if (local->tx_rate_control & WLAN_RATE_2M) {
+			*p++ = local->basic_rates & WLAN_RATE_2M ? 0x84 : 0x04;
+			(*lpos)++;
+		}
+		if (local->tx_rate_control & WLAN_RATE_5M5) {
+			*p++ = local->basic_rates & WLAN_RATE_5M5 ?
+				0x8b : 0x0b;
+			(*lpos)++;
+		}
+		if (local->tx_rate_control & WLAN_RATE_11M) {
+			*p++ = local->basic_rates & WLAN_RATE_11M ?
+				0x96 : 0x16;
+			(*lpos)++;
+		}
+		pos = (u16 *) p;
+	}
+
+	prism2_send_mgmt(dev, WLAN_FC_TYPE_MGMT,
+			 (send_deauth ? WLAN_FC_STYPE_DEAUTH :
+			  (reassoc ? WLAN_FC_STYPE_REASSOC_RESP :
+			   WLAN_FC_STYPE_ASSOC_RESP)),
+			 body, (u8 *) pos - (u8 *) body,
+			 hdr->addr2,
+			 send_deauth ? 0 : local->ap->tx_callback_assoc);
+
+	if (sta) {
+		if (resp == WLAN_STATUS_SUCCESS) {
+			sta->last_rx = jiffies;
+			/* STA will be marked associated from TX callback, if
+			 * AssocResp is ACKed */
+		}
+		atomic_dec(&sta->users);
+	}
+
+#if 0
+	PDEBUG(DEBUG_AP, "%s: " MACSTR " %sassoc (len=%d prev_ap=" MACSTR
+	       ") => %d(%d) (%s)\n",
+	       dev->name, MAC2STR(hdr->addr2), reassoc ? "re" : "", len,
+	       MAC2STR(prev_ap), resp, send_deauth, txt);
+#endif
+}
+
+
+/* Called only as a scheduled task for pending AP frames. */
+static void handle_deauth(local_info_t *local, struct sk_buff *skb,
+			  struct hostap_80211_rx_status *rx_stats)
+{
+	struct net_device *dev = local->dev;
+	struct hostap_ieee80211_hdr *hdr =
+		(struct hostap_ieee80211_hdr *) skb->data;
+	char *body = (char *) (skb->data + IEEE80211_MGMT_HDR_LEN);
+	int len;
+	u16 reason_code, *pos;
+	struct sta_info *sta = NULL;
+
+	len = skb->len - IEEE80211_MGMT_HDR_LEN;
+
+	if (len < 2) {
+		printk("handle_deauth - too short payload (len=%d)\n", len);
+		return;
+	}
+
+	pos = (u16 *) body;
+	reason_code = __le16_to_cpu(*pos);
+
+	PDEBUG(DEBUG_AP, "%s: deauthentication: " MACSTR " len=%d, "
+	       "reason_code=%d\n", dev->name, MAC2STR(hdr->addr2), len,
+	       reason_code);
+
+	spin_lock_bh(&local->ap->sta_table_lock);
+	sta = ap_get_sta(local->ap, hdr->addr2);
+	if (sta != NULL) {
+		if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
+			hostap_event_expired_sta(local->dev, sta);
+		sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
+	}
+	spin_unlock_bh(&local->ap->sta_table_lock);
+	if (sta == NULL) {
+		printk("%s: deauthentication from " MACSTR ", "
+	       "reason_code=%d, but STA not authenticated\n", dev->name,
+		       MAC2STR(hdr->addr2), reason_code);
+	}
+}
+
+
+/* Called only as a scheduled task for pending AP frames. */
+static void handle_disassoc(local_info_t *local, struct sk_buff *skb,
+			    struct hostap_80211_rx_status *rx_stats)
+{
+	struct net_device *dev = local->dev;
+	struct hostap_ieee80211_hdr *hdr =
+		(struct hostap_ieee80211_hdr *) skb->data;
+	char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
+	int len;
+	u16 reason_code, *pos;
+	struct sta_info *sta = NULL;
+
+	len = skb->len - IEEE80211_MGMT_HDR_LEN;
+
+	if (len < 2) {
+		printk("handle_disassoc - too short payload (len=%d)\n", len);
+		return;
+	}
+
+	pos = (u16 *) body;
+	reason_code = __le16_to_cpu(*pos);
+
+	PDEBUG(DEBUG_AP, "%s: disassociation: " MACSTR " len=%d, "
+	       "reason_code=%d\n", dev->name, MAC2STR(hdr->addr2), len,
+	       reason_code);
+
+	spin_lock_bh(&local->ap->sta_table_lock);
+	sta = ap_get_sta(local->ap, hdr->addr2);
+	if (sta != NULL) {
+		if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
+			hostap_event_expired_sta(local->dev, sta);
+		sta->flags &= ~WLAN_STA_ASSOC;
+	}
+	spin_unlock_bh(&local->ap->sta_table_lock);
+	if (sta == NULL) {
+		printk("%s: disassociation from " MACSTR ", "
+		       "reason_code=%d, but STA not authenticated\n",
+		       dev->name, MAC2STR(hdr->addr2), reason_code);
+	}
+}
+
+
+/* Called only as a scheduled task for pending AP frames. */
+static void ap_handle_data_nullfunc(local_info_t *local,
+				    struct hostap_ieee80211_hdr *hdr)
+{
+	struct net_device *dev = local->dev;
+
+	/* some STA f/w's seem to require control::ACK frame for
+	 * data::nullfunc, but at least Prism2 station f/w version 0.8.0 does
+	 * not send this..
+	 * send control::ACK for the data::nullfunc */
+
+	printk(KERN_DEBUG "Sending control::ACK for data::nullfunc\n");
+	prism2_send_mgmt(dev, WLAN_FC_TYPE_CTRL, WLAN_FC_STYPE_ACK,
+			 NULL, 0, hdr->addr2, 0);
+}
+
+
+/* Called only as a scheduled task for pending AP frames. */
+static void ap_handle_dropped_data(local_info_t *local,
+				   struct hostap_ieee80211_hdr *hdr)
+{
+	struct net_device *dev = local->dev;
+	struct sta_info *sta;
+	u16 reason;
+
+	spin_lock_bh(&local->ap->sta_table_lock);
+	sta = ap_get_sta(local->ap, hdr->addr2);
+	if (sta)
+		atomic_inc(&sta->users);
+	spin_unlock_bh(&local->ap->sta_table_lock);
+
+	if (sta != NULL && (sta->flags & WLAN_STA_ASSOC)) {
+		PDEBUG(DEBUG_AP, "ap_handle_dropped_data: STA is now okay?\n");
+		atomic_dec(&sta->users);
+		return;
+	}
+
+	reason = __constant_cpu_to_le16(
+		WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
+	prism2_send_mgmt(dev, WLAN_FC_TYPE_MGMT,
+			 ((sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) ?
+			  WLAN_FC_STYPE_DEAUTH : WLAN_FC_STYPE_DISASSOC),
+			 (char *) &reason, sizeof(reason), hdr->addr2, 0);
+
+	if (sta)
+		atomic_dec(&sta->users);
+}
+
+#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
+
+
+/* Called only as a scheduled task for pending AP frames. */
+static void pspoll_send_buffered(local_info_t *local, struct sta_info *sta,
+				 struct sk_buff *skb)
+{
+	if (!(sta->flags & WLAN_STA_PS)) {
+		/* Station has moved to non-PS mode, so send all buffered
+		 * frames using normal device queue. */
+		dev_queue_xmit(skb);
+		return;
+	}
+
+	/* add a flag for hostap_handle_sta_tx() to know that this skb should
+	 * be passed through even though STA is using PS */
+	memcpy(skb->cb, AP_SKB_CB_MAGIC, AP_SKB_CB_MAGIC_LEN);
+	skb->cb[AP_SKB_CB_MAGIC_LEN] = AP_SKB_CB_BUFFERED_FRAME;
+	if (!skb_queue_empty(&sta->tx_buf)) {
+		/* indicate to STA that more frames follow */
+		skb->cb[AP_SKB_CB_MAGIC_LEN] |= AP_SKB_CB_ADD_MOREDATA;
+	}
+	dev_queue_xmit(skb);
+}
+
+
+/* Called only as a scheduled task for pending AP frames. */
+static void handle_pspoll(local_info_t *local,
+			  struct hostap_ieee80211_hdr *hdr,
+			  struct hostap_80211_rx_status *rx_stats)
+{
+	struct net_device *dev = local->dev;
+	struct sta_info *sta;
+	u16 aid;
+	struct sk_buff *skb;
+
+	PDEBUG(DEBUG_PS2, "handle_pspoll: BSSID=" MACSTR ", TA=" MACSTR
+	       " PWRMGT=%d\n",
+	       MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
+	       !!(le16_to_cpu(hdr->frame_control) & WLAN_FC_PWRMGT));
+
+	if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
+		PDEBUG(DEBUG_AP, "handle_pspoll - addr1(BSSID)=" MACSTR
+		       " not own MAC\n", MAC2STR(hdr->addr1));
+		return;
+	}
+
+	aid = __le16_to_cpu(hdr->duration_id);
+	if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) {
+		PDEBUG(DEBUG_PS, "   PSPOLL and AID[15:14] not set\n");
+		return;
+	}
+	aid &= ~BIT(15) & ~BIT(14);
+	if (aid == 0 || aid > MAX_AID_TABLE_SIZE) {
+		PDEBUG(DEBUG_PS, "   invalid aid=%d\n", aid);
+		return;
+	}
+	PDEBUG(DEBUG_PS2, "   aid=%d\n", aid);
+
+	spin_lock_bh(&local->ap->sta_table_lock);
+	sta = ap_get_sta(local->ap, hdr->addr2);
+	if (sta)
+		atomic_inc(&sta->users);
+	spin_unlock_bh(&local->ap->sta_table_lock);
+
+	if (sta == NULL) {
+		PDEBUG(DEBUG_PS, "   STA not found\n");
+		return;
+	}
+	if (sta->aid != aid) {
+		PDEBUG(DEBUG_PS, "   received aid=%i does not match with "
+		       "assoc.aid=%d\n", aid, sta->aid);
+		return;
+	}
+
+	/* FIX: todo:
+	 * - add timeout for buffering (clear aid in TIM vector if buffer timed
+	 *   out (expiry time must be longer than ListenInterval for
+	 *   the corresponding STA; "8802-11: 11.2.1.9 AP aging function"
+	 * - what to do, if buffered, pspolled, and sent frame is not ACKed by
+	 *   sta; store buffer for later use and leave TIM aid bit set? use
+	 *   TX event to check whether frame was ACKed?
+	 */
+
+	while ((skb = skb_dequeue(&sta->tx_buf)) != NULL) {
+		/* send buffered frame .. */
+		PDEBUG(DEBUG_PS2, "Sending buffered frame to STA after PS POLL"
+		       " (buffer_count=%d)\n", skb_queue_len(&sta->tx_buf));
+
+		pspoll_send_buffered(local, sta, skb);
+
+		if (sta->flags & WLAN_STA_PS) {
+			/* send only one buffered packet per PS Poll */
+			/* FIX: should ignore further PS Polls until the
+			 * buffered packet that was just sent is acknowledged
+			 * (Tx or TxExc event) */
+			break;
+		}
+	}
+
+	if (skb_queue_empty(&sta->tx_buf)) {
+		/* try to clear aid from TIM */
+		if (!(sta->flags & WLAN_STA_TIM))
+			PDEBUG(DEBUG_PS2,  "Re-unsetting TIM for aid %d\n",
+			       aid);
+		hostap_set_tim(local, aid, 0);
+		sta->flags &= ~WLAN_STA_TIM;
+	}
+
+	atomic_dec(&sta->users);
+}
+
+
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+
+static void handle_wds_oper_queue(void *data)
+{
+	local_info_t *local = data;
+	struct wds_oper_data *entry, *prev;
+
+	spin_lock_bh(&local->lock);
+	entry = local->ap->wds_oper_entries;
+	local->ap->wds_oper_entries = NULL;
+	spin_unlock_bh(&local->lock);
+
+	while (entry) {
+		PDEBUG(DEBUG_AP, "%s: %s automatic WDS connection "
+		       "to AP " MACSTR "\n",
+		       local->dev->name,
+		       entry->type == WDS_ADD ? "adding" : "removing",
+		       MAC2STR(entry->addr));
+		if (entry->type == WDS_ADD)
+			prism2_wds_add(local, entry->addr, 0);
+		else if (entry->type == WDS_DEL)
+			prism2_wds_del(local, entry->addr, 0, 1);
+
+		prev = entry;
+		entry = entry->next;
+		kfree(prev);
+	}
+}
+
+
+/* Called only as a scheduled task for pending AP frames. */
+static void handle_beacon(local_info_t *local, struct sk_buff *skb,
+			  struct hostap_80211_rx_status *rx_stats)
+{
+	struct hostap_ieee80211_hdr *hdr =
+		(struct hostap_ieee80211_hdr *) skb->data;
+	char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
+	int len, left;
+	u16 *pos, beacon_int, capability;
+	char *ssid = NULL;
+	unsigned char *supp_rates = NULL;
+	int ssid_len = 0, supp_rates_len = 0;
+	struct sta_info *sta = NULL;
+	int new_sta = 0, channel = -1;
+
+	len = skb->len - IEEE80211_MGMT_HDR_LEN;
+
+	if (len < 8 + 2 + 2) {
+		printk(KERN_DEBUG "handle_beacon - too short payload "
+		       "(len=%d)\n", len);
+		return;
+	}
+
+	pos = (u16 *) body;
+	left = len;
+
+	/* Timestamp (8 octets) */
+	pos += 4; left -= 8;
+	/* Beacon interval (2 octets) */
+	beacon_int = __le16_to_cpu(*pos);
+	pos++; left -= 2;
+	/* Capability information (2 octets) */
+	capability = __le16_to_cpu(*pos);
+	pos++; left -= 2;
+
+	if (local->ap->ap_policy != AP_OTHER_AP_EVEN_IBSS &&
+	    capability & WLAN_CAPABILITY_IBSS)
+		return;
+
+	if (left >= 2) {
+		unsigned int ileft;
+		unsigned char *u = (unsigned char *) pos;
+
+		if (*u == WLAN_EID_SSID) {
+			u++; left--;
+			ileft = *u;
+			u++; left--;
+
+			if (ileft > left || ileft > MAX_SSID_LEN) {
+				PDEBUG(DEBUG_AP, "SSID: overflow\n");
+				return;
+			}
+
+			if (local->ap->ap_policy == AP_OTHER_AP_SAME_SSID &&
+			    (ileft != strlen(local->essid) ||
+			     memcmp(local->essid, u, ileft) != 0)) {
+				/* not our SSID */
+				return;
+			}
+
+			ssid = u;
+			ssid_len = ileft;
+
+			u += ileft;
+			left -= ileft;
+		}
+
+		if (*u == WLAN_EID_SUPP_RATES) {
+			u++; left--;
+			ileft = *u;
+			u++; left--;
+			
+			if (ileft > left || ileft == 0 || ileft > 8) {
+				PDEBUG(DEBUG_AP, " - SUPP_RATES len error\n");
+				return;
+			}
+
+			supp_rates = u;
+			supp_rates_len = ileft;
+
+			u += ileft;
+			left -= ileft;
+		}
+
+		if (*u == WLAN_EID_DS_PARAMS) {
+			u++; left--;
+			ileft = *u;
+			u++; left--;
+			
+			if (ileft > left || ileft != 1) {
+				PDEBUG(DEBUG_AP, " - DS_PARAMS len error\n");
+				return;
+			}
+
+			channel = *u;
+
+			u += ileft;
+			left -= ileft;
+		}
+	}
+
+	spin_lock_bh(&local->ap->sta_table_lock);
+	sta = ap_get_sta(local->ap, hdr->addr2);
+	if (sta != NULL)
+		atomic_inc(&sta->users);
+	spin_unlock_bh(&local->ap->sta_table_lock);
+
+	if (sta == NULL) {
+		/* add new AP */
+		new_sta = 1;
+		sta = ap_add_sta(local->ap, hdr->addr2);
+		if (sta == NULL) {
+			printk(KERN_INFO "prism2: kmalloc failed for AP "
+			       "data structure\n");
+			return;
+		}
+		hostap_event_new_sta(local->dev, sta);
+
+		/* mark APs authentication and associated for pseudo ad-hoc
+		 * style communication */
+		sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
+
+		if (local->ap->autom_ap_wds) {
+			hostap_wds_link_oper(local, sta->addr, WDS_ADD);
+		}
+	}
+
+	sta->ap = 1;
+	if (ssid) {
+		sta->u.ap.ssid_len = ssid_len;
+		memcpy(sta->u.ap.ssid, ssid, ssid_len);
+		sta->u.ap.ssid[ssid_len] = '\0';
+	} else {
+		sta->u.ap.ssid_len = 0;
+		sta->u.ap.ssid[0] = '\0';
+	}
+	sta->u.ap.channel = channel;
+	sta->rx_packets++;
+	sta->rx_bytes += len;
+	sta->u.ap.last_beacon = sta->last_rx = jiffies;
+	sta->capability = capability;
+	sta->listen_interval = beacon_int;
+
+	atomic_dec(&sta->users);
+
+	if (new_sta) {
+		memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
+		memcpy(sta->supported_rates, supp_rates, supp_rates_len);
+		prism2_check_tx_rates(sta);
+	}
+}
+
+#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
+
+
+/* Called only as a tasklet. */
+static void handle_ap_item(local_info_t *local, struct sk_buff *skb,
+			   struct hostap_80211_rx_status *rx_stats)
+{
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+	struct net_device *dev = local->dev;
+#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
+	u16 fc, type, stype;
+	struct hostap_ieee80211_hdr *hdr;
+
+	/* FIX: should give skb->len to handler functions and check that the
+	 * buffer is long enough */
+	hdr = (struct hostap_ieee80211_hdr *) skb->data;
+	fc = le16_to_cpu(hdr->frame_control);
+	type = WLAN_FC_GET_TYPE(fc);
+	stype = WLAN_FC_GET_STYPE(fc);
+
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+	if (!local->hostapd && type == WLAN_FC_TYPE_DATA) {
+		PDEBUG(DEBUG_AP, "handle_ap_item - data frame\n");
+
+		if (!(fc & WLAN_FC_TODS) || (fc & WLAN_FC_FROMDS)) {
+			if (stype == WLAN_FC_STYPE_NULLFUNC) {
+				/* no ToDS nullfunc seems to be used to check
+				 * AP association; so send reject message to
+				 * speed up re-association */
+				ap_handle_dropped_data(local, hdr);
+				goto done;
+			}
+			PDEBUG(DEBUG_AP, "   not ToDS frame (fc=0x%04x)\n",
+			       fc);
+			goto done;
+		}
+
+		if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
+			PDEBUG(DEBUG_AP, "handle_ap_item - addr1(BSSID)="
+			       MACSTR " not own MAC\n",
+			       MAC2STR(hdr->addr1));
+			goto done;
+		}
+
+		if (local->ap->nullfunc_ack && stype == WLAN_FC_STYPE_NULLFUNC)
+			ap_handle_data_nullfunc(local, hdr);
+		else
+			ap_handle_dropped_data(local, hdr);
+		goto done;
+	}
+
+	if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_BEACON) {
+		handle_beacon(local, skb, rx_stats);
+		goto done;
+	}
+#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
+
+	if (type == WLAN_FC_TYPE_CTRL && stype == WLAN_FC_STYPE_PSPOLL) {
+		handle_pspoll(local, hdr, rx_stats);
+		goto done;
+	}
+
+	if (local->hostapd) {
+		PDEBUG(DEBUG_AP, "Unknown frame in AP queue: type=0x%02x "
+		       "subtype=0x%02x\n", type, stype);
+		goto done;
+	}
+
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+	if (type != WLAN_FC_TYPE_MGMT) {
+		PDEBUG(DEBUG_AP, "handle_ap_item - not a management frame?\n");
+		goto done;
+	}
+
+	if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
+		PDEBUG(DEBUG_AP, "handle_ap_item - addr1(DA)=" MACSTR
+		       " not own MAC\n", MAC2STR(hdr->addr1));
+		goto done;
+	}
+
+	if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN)) {
+		PDEBUG(DEBUG_AP, "handle_ap_item - addr3(BSSID)=" MACSTR
+		       " not own MAC\n", MAC2STR(hdr->addr3));
+		goto done;
+	}
+
+	switch (stype) {
+	case WLAN_FC_STYPE_ASSOC_REQ:
+		handle_assoc(local, skb, rx_stats, 0);
+		break;
+	case WLAN_FC_STYPE_ASSOC_RESP:
+		PDEBUG(DEBUG_AP, "==> ASSOC RESP (ignored)\n");
+		break;
+	case WLAN_FC_STYPE_REASSOC_REQ:
+		handle_assoc(local, skb, rx_stats, 1);
+		break;
+	case WLAN_FC_STYPE_REASSOC_RESP:
+		PDEBUG(DEBUG_AP, "==> REASSOC RESP (ignored)\n");
+		break;
+	case WLAN_FC_STYPE_ATIM:
+		PDEBUG(DEBUG_AP, "==> ATIM (ignored)\n");
+		break;
+	case WLAN_FC_STYPE_DISASSOC:
+		handle_disassoc(local, skb, rx_stats);
+		break;
+	case WLAN_FC_STYPE_AUTH:
+		handle_authen(local, skb, rx_stats);
+		break;
+	case WLAN_FC_STYPE_DEAUTH:
+		handle_deauth(local, skb, rx_stats);
+		break;
+	default:
+		PDEBUG(DEBUG_AP, "Unknown mgmt frame subtype 0x%02x\n", stype);
+		break;
+	}
+#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
+
+ done:
+	dev_kfree_skb(skb);
+}
+
+
+/* Called only as a tasklet (software IRQ) */
+void hostap_rx(struct net_device *dev, struct sk_buff *skb,
+	       struct hostap_80211_rx_status *rx_stats)
+{
+	struct hostap_interface *iface;
+	local_info_t *local;
+	u16 fc;
+	struct hostap_ieee80211_hdr *hdr;
+
+	iface = netdev_priv(dev);
+	local = iface->local;
+
+	if (skb->len < 16)
+		goto drop;
+
+	local->stats.rx_packets++;
+
+	hdr = (struct hostap_ieee80211_hdr *) skb->data;
+	fc = le16_to_cpu(hdr->frame_control);
+
+	if (local->ap->ap_policy == AP_OTHER_AP_SKIP_ALL &&
+	    WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
+	    WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON)
+		goto drop;
+
+	skb->protocol = __constant_htons(ETH_P_HOSTAP);
+	handle_ap_item(local, skb, rx_stats);
+	return;
+
+ drop:
+	dev_kfree_skb(skb);
+}
+
+
+/* Called only as a tasklet (software IRQ) */
+static void schedule_packet_send(local_info_t *local, struct sta_info *sta)
+{
+	struct sk_buff *skb;
+	struct hostap_ieee80211_hdr *hdr;
+	struct hostap_80211_rx_status rx_stats;
+
+	if (skb_queue_empty(&sta->tx_buf))
+		return;
+
+	skb = dev_alloc_skb(16);
+	if (skb == NULL) {
+		printk(KERN_DEBUG "%s: schedule_packet_send: skb alloc "
+		       "failed\n", local->dev->name);
+		return;
+	}
+
+	hdr = (struct hostap_ieee80211_hdr *) skb_put(skb, 16);
+
+	/* Generate a fake pspoll frame to start packet delivery */
+	hdr->frame_control = __constant_cpu_to_le16(
+		(WLAN_FC_TYPE_CTRL << 2) | (WLAN_FC_STYPE_PSPOLL << 4));
+	memcpy(hdr->addr1, local->dev->dev_addr, ETH_ALEN);
+	memcpy(hdr->addr2, sta->addr, ETH_ALEN);
+	hdr->duration_id = cpu_to_le16(sta->aid | BIT(15) | BIT(14));
+
+	PDEBUG(DEBUG_PS2, "%s: Scheduling buffered packet delivery for "
+	       "STA " MACSTR "\n", local->dev->name, MAC2STR(sta->addr));
+
+	skb->dev = local->dev;
+
+	memset(&rx_stats, 0, sizeof(rx_stats));
+	hostap_rx(local->dev, skb, &rx_stats);
+}
+
+
+static int prism2_ap_get_sta_qual(local_info_t *local, struct sockaddr addr[],
+				  struct iw_quality qual[], int buf_size,
+				  int aplist)
+{
+	struct ap_data *ap = local->ap;
+	struct list_head *ptr;
+	int count = 0;
+
+	spin_lock_bh(&ap->sta_table_lock);
+
+	for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
+	     ptr = ptr->next) {
+		struct sta_info *sta = (struct sta_info *) ptr;
+
+		if (aplist && !sta->ap)
+			continue;
+		addr[count].sa_family = ARPHRD_ETHER;
+		memcpy(addr[count].sa_data, sta->addr, ETH_ALEN);
+		if (sta->last_rx_silence == 0)
+			qual[count].qual = sta->last_rx_signal < 27 ?
+				0 : (sta->last_rx_signal - 27) * 92 / 127;
+		else
+			qual[count].qual = sta->last_rx_signal -
+				sta->last_rx_silence - 35;
+		qual[count].level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
+		qual[count].noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
+		qual[count].updated = sta->last_rx_updated;
+
+		sta->last_rx_updated = 0;
+
+		count++;
+		if (count >= buf_size)
+			break;
+	}
+	spin_unlock_bh(&ap->sta_table_lock);
+
+	return count;
+}
+
+
+/* Translate our list of Access Points & Stations to a card independant
+ * format that the Wireless Tools will understand - Jean II */
+static int prism2_ap_translate_scan(struct net_device *dev, char *buffer)
+{
+	struct hostap_interface *iface;
+	local_info_t *local;
+	struct ap_data *ap;
+	struct list_head *ptr;
+	struct iw_event iwe;
+	char *current_ev = buffer;
+	char *end_buf = buffer + IW_SCAN_MAX_DATA;
+#if !defined(PRISM2_NO_KERNEL_IEEE80211_MGMT)
+	char buf[64];
+#endif
+
+	iface = netdev_priv(dev);
+	local = iface->local;
+	ap = local->ap;
+
+	spin_lock_bh(&ap->sta_table_lock);
+
+	for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
+	     ptr = ptr->next) {
+		struct sta_info *sta = (struct sta_info *) ptr;
+
+		/* First entry *MUST* be the AP MAC address */
+		memset(&iwe, 0, sizeof(iwe));
+		iwe.cmd = SIOCGIWAP;
+		iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
+		memcpy(iwe.u.ap_addr.sa_data, sta->addr, ETH_ALEN);
+		iwe.len = IW_EV_ADDR_LEN;
+		current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
+						  IW_EV_ADDR_LEN);
+
+		/* Use the mode to indicate if it's a station or
+		 * an Access Point */
+		memset(&iwe, 0, sizeof(iwe));
+		iwe.cmd = SIOCGIWMODE;
+		if (sta->ap)
+			iwe.u.mode = IW_MODE_MASTER;
+		else
+			iwe.u.mode = IW_MODE_INFRA;
+		iwe.len = IW_EV_UINT_LEN;
+		current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
+						  IW_EV_UINT_LEN);
+
+		/* Some quality */
+		memset(&iwe, 0, sizeof(iwe));
+		iwe.cmd = IWEVQUAL;
+		if (sta->last_rx_silence == 0)
+			iwe.u.qual.qual = sta->last_rx_signal < 27 ?
+				0 : (sta->last_rx_signal - 27) * 92 / 127;
+		else
+			iwe.u.qual.qual = sta->last_rx_signal -
+				sta->last_rx_silence - 35;
+		iwe.u.qual.level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
+		iwe.u.qual.noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
+		iwe.u.qual.updated = sta->last_rx_updated;
+		iwe.len = IW_EV_QUAL_LEN;
+		current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
+						  IW_EV_QUAL_LEN);
+
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+		if (sta->ap) {
+			memset(&iwe, 0, sizeof(iwe));
+			iwe.cmd = SIOCGIWESSID;
+			iwe.u.data.length = sta->u.ap.ssid_len;
+			iwe.u.data.flags = 1;
+			current_ev = iwe_stream_add_point(current_ev, end_buf,
+							  &iwe,
+							  sta->u.ap.ssid);
+
+			memset(&iwe, 0, sizeof(iwe));
+			iwe.cmd = SIOCGIWENCODE;
+			if (sta->capability & WLAN_CAPABILITY_PRIVACY)
+				iwe.u.data.flags =
+					IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
+			else
+				iwe.u.data.flags = IW_ENCODE_DISABLED;
+			current_ev = iwe_stream_add_point(current_ev, end_buf,
+							  &iwe,
+							  sta->u.ap.ssid
+							  /* 0 byte memcpy */);
+
+			if (sta->u.ap.channel > 0 &&
+			    sta->u.ap.channel <= FREQ_COUNT) {
+				memset(&iwe, 0, sizeof(iwe));
+				iwe.cmd = SIOCGIWFREQ;
+				iwe.u.freq.m = freq_list[sta->u.ap.channel - 1]
+					* 100000;
+				iwe.u.freq.e = 1;
+				current_ev = iwe_stream_add_event(
+					current_ev, end_buf, &iwe,
+					IW_EV_FREQ_LEN);
+			}
+
+			memset(&iwe, 0, sizeof(iwe));
+			iwe.cmd = IWEVCUSTOM;
+			sprintf(buf, "beacon_interval=%d",
+				sta->listen_interval);
+			iwe.u.data.length = strlen(buf);
+			current_ev = iwe_stream_add_point(current_ev, end_buf,
+							  &iwe, buf);
+		}
+#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
+
+		sta->last_rx_updated = 0;
+
+		/* To be continued, we should make good use of IWEVCUSTOM */
+	}
+
+	spin_unlock_bh(&ap->sta_table_lock);
+
+	return current_ev - buffer;
+}
+
+
+static int prism2_hostapd_add_sta(struct ap_data *ap,
+				  struct prism2_hostapd_param *param)
+{
+	struct sta_info *sta;
+
+	spin_lock_bh(&ap->sta_table_lock);
+	sta = ap_get_sta(ap, param->sta_addr);
+	if (sta)
+		atomic_inc(&sta->users);
+	spin_unlock_bh(&ap->sta_table_lock);
+
+	if (sta == NULL) {
+		sta = ap_add_sta(ap, param->sta_addr);
+		if (sta == NULL)
+			return -1;
+	}
+
+	if (!(sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
+		hostap_event_new_sta(sta->local->dev, sta);
+
+	sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
+	sta->last_rx = jiffies;
+	sta->aid = param->u.add_sta.aid;
+	sta->capability = param->u.add_sta.capability;
+	sta->tx_supp_rates = param->u.add_sta.tx_supp_rates;
+	if (sta->tx_supp_rates & WLAN_RATE_1M)
+		sta->supported_rates[0] = 2;
+	if (sta->tx_supp_rates & WLAN_RATE_2M)
+		sta->supported_rates[1] = 4;
+ 	if (sta->tx_supp_rates & WLAN_RATE_5M5)
+		sta->supported_rates[2] = 11;
+	if (sta->tx_supp_rates & WLAN_RATE_11M)
+		sta->supported_rates[3] = 22;
+	prism2_check_tx_rates(sta);
+	atomic_dec(&sta->users);
+	return 0;
+}
+
+
+static int prism2_hostapd_remove_sta(struct ap_data *ap,
+				     struct prism2_hostapd_param *param)
+{
+	struct sta_info *sta;
+
+	spin_lock_bh(&ap->sta_table_lock);
+	sta = ap_get_sta(ap, param->sta_addr);
+	if (sta) {
+		ap_sta_hash_del(ap, sta);
+		list_del(&sta->list);
+	}
+	spin_unlock_bh(&ap->sta_table_lock);
+
+	if (!sta)
+		return -ENOENT;
+
+	if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
+		hostap_event_expired_sta(sta->local->dev, sta);
+	ap_free_sta(ap, sta);
+
+	return 0;
+}
+
+
+static int prism2_hostapd_get_info_sta(struct ap_data *ap,
+				       struct prism2_hostapd_param *param)
+{
+	struct sta_info *sta;
+
+	spin_lock_bh(&ap->sta_table_lock);
+	sta = ap_get_sta(ap, param->sta_addr);
+	if (sta)
+		atomic_inc(&sta->users);
+	spin_unlock_bh(&ap->sta_table_lock);
+
+	if (!sta)
+		return -ENOENT;
+
+	param->u.get_info_sta.inactive_sec = (jiffies - sta->last_rx) / HZ;
+
+	atomic_dec(&sta->users);
+
+	return 1;
+}
+
+
+static int prism2_hostapd_set_flags_sta(struct ap_data *ap,
+					struct prism2_hostapd_param *param)
+{
+	struct sta_info *sta;
+
+	spin_lock_bh(&ap->sta_table_lock);
+	sta = ap_get_sta(ap, param->sta_addr);
+	if (sta) {
+		sta->flags |= param->u.set_flags_sta.flags_or;
+		sta->flags &= param->u.set_flags_sta.flags_and;
+	}
+	spin_unlock_bh(&ap->sta_table_lock);
+
+	if (!sta)
+		return -ENOENT;
+
+	return 0;
+}
+
+
+static int prism2_hostapd_sta_clear_stats(struct ap_data *ap,
+					  struct prism2_hostapd_param *param)
+{
+	struct sta_info *sta;
+	int rate;
+
+	spin_lock_bh(&ap->sta_table_lock);
+	sta = ap_get_sta(ap, param->sta_addr);
+	if (sta) {
+		sta->rx_packets = sta->tx_packets = 0;
+		sta->rx_bytes = sta->tx_bytes = 0;
+		for (rate = 0; rate < WLAN_RATE_COUNT; rate++) {
+			sta->tx_count[rate] = 0;
+			sta->rx_count[rate] = 0;
+		}
+	}
+	spin_unlock_bh(&ap->sta_table_lock);
+
+	if (!sta)
+		return -ENOENT;
+
+	return 0;
+}
+
+
+static int prism2_hostapd(struct ap_data *ap,
+			  struct prism2_hostapd_param *param)
+{
+	switch (param->cmd) {
+	case PRISM2_HOSTAPD_FLUSH:
+		ap_control_kickall(ap);
+		return 0;
+	case PRISM2_HOSTAPD_ADD_STA:
+		return prism2_hostapd_add_sta(ap, param);
+	case PRISM2_HOSTAPD_REMOVE_STA:
+		return prism2_hostapd_remove_sta(ap, param);
+	case PRISM2_HOSTAPD_GET_INFO_STA:
+		return prism2_hostapd_get_info_sta(ap, param);
+	case PRISM2_HOSTAPD_SET_FLAGS_STA:
+		return prism2_hostapd_set_flags_sta(ap, param);
+	case PRISM2_HOSTAPD_STA_CLEAR_STATS:
+		return prism2_hostapd_sta_clear_stats(ap, param);
+	default:
+		printk(KERN_WARNING "prism2_hostapd: unknown cmd=%d\n",
+		       param->cmd);
+		return -EOPNOTSUPP;
+	}
+}
+
+
+/* Update station info for host-based TX rate control and return current
+ * TX rate */
+static int ap_update_sta_tx_rate(struct sta_info *sta, struct net_device *dev)
+{
+	int ret = sta->tx_rate;
+	struct hostap_interface *iface;
+	local_info_t *local;
+
+	iface = netdev_priv(dev);
+	local = iface->local;
+
+	sta->tx_count[sta->tx_rate_idx]++;
+	sta->tx_since_last_failure++;
+	sta->tx_consecutive_exc = 0;
+	if (sta->tx_since_last_failure >= WLAN_RATE_UPDATE_COUNT &&
+	    sta->tx_rate_idx < sta->tx_max_rate) {
+		/* use next higher rate */
+		int old_rate, new_rate;
+		old_rate = new_rate = sta->tx_rate_idx;
+		while (new_rate < sta->tx_max_rate) {
+			new_rate++;
+			if (ap_tx_rate_ok(new_rate, sta, local)) {
+				sta->tx_rate_idx = new_rate;
+				break;
+			}
+		}
+		if (old_rate != sta->tx_rate_idx) {
+			switch (sta->tx_rate_idx) {
+			case 0: sta->tx_rate = 10; break;
+			case 1: sta->tx_rate = 20; break;
+			case 2: sta->tx_rate = 55; break;
+			case 3: sta->tx_rate = 110; break;
+			default: sta->tx_rate = 0; break;
+			}
+			PDEBUG(DEBUG_AP, "%s: STA " MACSTR " TX rate raised to"
+			       " %d\n", dev->name, MAC2STR(sta->addr),
+			       sta->tx_rate);
+		}
+		sta->tx_since_last_failure = 0;
+	}
+
+	return ret;
+}
+
+
+/* Called only from software IRQ. Called for each TX frame prior possible
+ * encryption and transmit. */
+ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx)
+{
+	struct sta_info *sta = NULL;
+	struct sk_buff *skb = tx->skb;
+	int set_tim, ret;
+	struct hostap_ieee80211_hdr *hdr;
+	struct hostap_skb_tx_data *meta;
+
+	meta = (struct hostap_skb_tx_data *) skb->cb;
+	ret = AP_TX_CONTINUE;
+	if (local->ap == NULL || skb->len < 10 ||
+	    meta->iface->type == HOSTAP_INTERFACE_STA)
+		goto out;
+
+	hdr = (struct hostap_ieee80211_hdr *) skb->data;
+
+	if (hdr->addr1[0] & 0x01) {
+		/* broadcast/multicast frame - no AP related processing */
+		goto out;
+	}
+
+	/* unicast packet - check whether destination STA is associated */
+	spin_lock(&local->ap->sta_table_lock);
+	sta = ap_get_sta(local->ap, hdr->addr1);
+	if (sta)
+		atomic_inc(&sta->users);
+	spin_unlock(&local->ap->sta_table_lock);
+
+	if (local->iw_mode == IW_MODE_MASTER && sta == NULL && !meta->wds &&
+	    meta->iface->type != HOSTAP_INTERFACE_MASTER &&
+	    meta->iface->type != HOSTAP_INTERFACE_AP) {
+#if 0
+		/* This can happen, e.g., when wlan0 is added to a bridge and
+		 * bridging code does not know which port is the correct target
+		 * for a unicast frame. In this case, the packet is send to all
+		 * ports of the bridge. Since this is a valid scenario, do not
+		 * print out any errors here. */
+		if (net_ratelimit()) {
+			printk(KERN_DEBUG "AP: drop packet to non-associated "
+			       "STA " MACSTR "\n", MAC2STR(hdr->addr1));
+		}
+#endif
+		local->ap->tx_drop_nonassoc++;
+		ret = AP_TX_DROP;
+		goto out;
+	}
+
+	if (sta == NULL)
+		goto out;
+
+	if (!(sta->flags & WLAN_STA_AUTHORIZED))
+		ret = AP_TX_CONTINUE_NOT_AUTHORIZED;
+
+	/* Set tx_rate if using host-based TX rate control */
+	if (!local->fw_tx_rate_control)
+		local->ap->last_tx_rate = meta->rate =
+			ap_update_sta_tx_rate(sta, local->dev);
+
+	if (local->iw_mode != IW_MODE_MASTER)
+		goto out;
+
+	if (!(sta->flags & WLAN_STA_PS))
+		goto out;
+
+	if (memcmp(skb->cb, AP_SKB_CB_MAGIC, AP_SKB_CB_MAGIC_LEN) == 0) {
+		if (skb->cb[AP_SKB_CB_MAGIC_LEN] & AP_SKB_CB_ADD_MOREDATA) {
+			/* indicate to STA that more frames follow */
+			hdr->frame_control |=
+				__constant_cpu_to_le16(WLAN_FC_MOREDATA);
+		}
+
+		if (skb->cb[AP_SKB_CB_MAGIC_LEN] & AP_SKB_CB_BUFFERED_FRAME) {
+			/* packet was already buffered and now send due to
+			 * PS poll, so do not rebuffer it */
+			goto out;
+		}
+	}
+
+	if (skb_queue_len(&sta->tx_buf) >= STA_MAX_TX_BUFFER) {
+		PDEBUG(DEBUG_PS, "%s: No more space in STA (" MACSTR ")'s PS "
+		       "mode buffer\n", local->dev->name, MAC2STR(sta->addr));
+		/* Make sure that TIM is set for the station (it might not be
+		 * after AP wlan hw reset). */
+		/* FIX: should fix hw reset to restore bits based on STA
+		 * buffer state.. */
+		hostap_set_tim(local, sta->aid, 1);
+		sta->flags |= WLAN_STA_TIM;
+		ret = AP_TX_DROP;
+		goto out;
+	}
+
+	/* STA in PS mode, buffer frame for later delivery */
+	set_tim = skb_queue_empty(&sta->tx_buf);
+	skb_queue_tail(&sta->tx_buf, skb);
+	/* FIX: could save RX time to skb and expire buffered frames after
+	 * some time if STA does not poll for them */
+
+	if (set_tim) {
+		if (sta->flags & WLAN_STA_TIM)
+			PDEBUG(DEBUG_PS2, "Re-setting TIM for aid %d\n",
+			       sta->aid);
+		hostap_set_tim(local, sta->aid, 1);
+		sta->flags |= WLAN_STA_TIM;
+	}
+
+	ret = AP_TX_BUFFERED;
+
+ out:
+	if (sta != NULL) {
+		if (ret == AP_TX_CONTINUE ||
+		    ret == AP_TX_CONTINUE_NOT_AUTHORIZED) {
+			sta->tx_packets++;
+			sta->tx_bytes += skb->len;
+			sta->last_tx = jiffies;
+		}
+
+		if ((ret == AP_TX_CONTINUE ||
+		     ret == AP_TX_CONTINUE_NOT_AUTHORIZED) &&
+		    sta->crypt && tx->host_encrypt) {
+			tx->crypt = sta->crypt;
+			tx->sta_ptr = sta; /* hostap_handle_sta_release() will
+					    * be called to release sta info
+					    * later */
+		} else
+			atomic_dec(&sta->users);
+	}
+
+	return ret;
+}
+
+
+void hostap_handle_sta_release(void *ptr)
+{
+	struct sta_info *sta = ptr;
+	atomic_dec(&sta->users);
+}
+
+
+/* Called only as a tasklet (software IRQ) */
+void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb)
+{
+	struct sta_info *sta;
+	struct hostap_ieee80211_hdr *hdr;
+	struct hostap_skb_tx_data *meta;
+
+	hdr = (struct hostap_ieee80211_hdr *) skb->data;
+	meta = (struct hostap_skb_tx_data *) skb->cb;
+
+	spin_lock(&local->ap->sta_table_lock);
+	sta = ap_get_sta(local->ap, hdr->addr1);
+	if (!sta) {
+		spin_unlock(&local->ap->sta_table_lock);
+		PDEBUG(DEBUG_AP, "%s: Could not find STA " MACSTR " for this "
+		       "TX error (@%lu)\n",
+		       local->dev->name, MAC2STR(hdr->addr1), jiffies);
+		return;
+	}
+
+	sta->tx_since_last_failure = 0;
+	sta->tx_consecutive_exc++;
+        
+	if (sta->tx_consecutive_exc >= WLAN_RATE_DECREASE_THRESHOLD &&
+	    sta->tx_rate_idx > 0 && meta->rate <= sta->tx_rate) {
+		/* use next lower rate */
+		int old, rate;
+		old = rate = sta->tx_rate_idx;
+		while (rate > 0) {
+			rate--;
+			if (ap_tx_rate_ok(rate, sta, local)) {
+				sta->tx_rate_idx = rate;
+				break;
+			}
+		}
+		if (old != sta->tx_rate_idx) {
+			switch (sta->tx_rate_idx) {
+			case 0: sta->tx_rate = 10; break;
+			case 1: sta->tx_rate = 20; break;
+			case 2: sta->tx_rate = 55; break;
+			case 3: sta->tx_rate = 110; break;
+			default: sta->tx_rate = 0; break;
+			}
+			PDEBUG(DEBUG_AP, "%s: STA " MACSTR " TX rate lowered "
+			       "to %d\n", local->dev->name, MAC2STR(sta->addr),
+			       sta->tx_rate);
+		}
+		sta->tx_consecutive_exc = 0;
+	}
+	spin_unlock(&local->ap->sta_table_lock);
+}
+
+
+static void hostap_update_sta_ps2(local_info_t *local, struct sta_info *sta,
+				  int pwrmgt, int type, int stype)
+{
+	if (pwrmgt && !(sta->flags & WLAN_STA_PS)) {
+		sta->flags |= WLAN_STA_PS;
+		PDEBUG(DEBUG_PS2, "STA " MACSTR " changed to use PS "
+		       "mode (type=0x%02X, stype=0x%02X)\n",
+		       MAC2STR(sta->addr), type, stype);
+	} else if (!pwrmgt && (sta->flags & WLAN_STA_PS)) {
+		sta->flags &= ~WLAN_STA_PS;
+		PDEBUG(DEBUG_PS2, "STA " MACSTR " changed to not use "
+		       "PS mode (type=0x%02X, stype=0x%02X)\n",
+		       MAC2STR(sta->addr), type, stype);
+		if (type != WLAN_FC_TYPE_CTRL || stype != WLAN_FC_STYPE_PSPOLL)
+			schedule_packet_send(local, sta);
+	}
+}
+
+
+/* Called only as a tasklet (software IRQ). Called for each RX frame to update
+ * STA power saving state. pwrmgt is a flag from 802.11 frame_control field. */
+int hostap_update_sta_ps(local_info_t *local, struct hostap_ieee80211_hdr *hdr)
+{
+	struct sta_info *sta;
+	u16 fc;
+
+	spin_lock(&local->ap->sta_table_lock);
+	sta = ap_get_sta(local->ap, hdr->addr2);
+	if (sta)
+		atomic_inc(&sta->users);
+	spin_unlock(&local->ap->sta_table_lock);
+
+	if (!sta)
+		return -1;
+
+	fc = le16_to_cpu(hdr->frame_control);
+	hostap_update_sta_ps2(local, sta, fc & WLAN_FC_PWRMGT,
+			      WLAN_FC_GET_TYPE(fc), WLAN_FC_GET_STYPE(fc));
+
+	atomic_dec(&sta->users);
+	return 0;
+}
+
+
+/* Called only as a tasklet (software IRQ). Called for each RX frame after
+ * getting RX header and payload from hardware. */
+ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
+			       struct sk_buff *skb,
+			       struct hostap_80211_rx_status *rx_stats,
+			       int wds)
+{
+	int ret;
+	struct sta_info *sta;
+	u16 fc, type, stype;
+	struct hostap_ieee80211_hdr *hdr;
+
+	if (local->ap == NULL)
+		return AP_RX_CONTINUE;
+
+	hdr = (struct hostap_ieee80211_hdr *) skb->data;
+
+	fc = le16_to_cpu(hdr->frame_control);
+	type = WLAN_FC_GET_TYPE(fc);
+	stype = WLAN_FC_GET_STYPE(fc);
+
+	spin_lock(&local->ap->sta_table_lock);
+	sta = ap_get_sta(local->ap, hdr->addr2);
+	if (sta)
+		atomic_inc(&sta->users);
+	spin_unlock(&local->ap->sta_table_lock);
+
+	if (sta && !(sta->flags & WLAN_STA_AUTHORIZED))
+		ret = AP_RX_CONTINUE_NOT_AUTHORIZED;
+	else
+		ret = AP_RX_CONTINUE;
+
+
+	if (fc & WLAN_FC_TODS) {
+		if (!wds && (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
+			if (local->hostapd) {
+				prism2_rx_80211(local->apdev, skb, rx_stats,
+						PRISM2_RX_NON_ASSOC);
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+			} else {
+				printk(KERN_DEBUG "%s: dropped received packet"
+				       " from non-associated STA " MACSTR
+				       " (type=0x%02x, subtype=0x%02x)\n",
+				       dev->name, MAC2STR(hdr->addr2), type,
+				       stype);
+				hostap_rx(dev, skb, rx_stats);
+#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
+			}
+			ret = AP_RX_EXIT;
+			goto out;
+		}
+	} else if (fc & WLAN_FC_FROMDS) {
+		if (!wds) {
+			/* FromDS frame - not for us; probably
+			 * broadcast/multicast in another BSS - drop */
+			if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
+				printk(KERN_DEBUG "Odd.. FromDS packet "
+				       "received with own BSSID\n");
+				hostap_dump_rx_80211(dev->name, skb, rx_stats);
+			}
+			ret = AP_RX_DROP;
+			goto out;
+		}
+	} else if (stype == WLAN_FC_STYPE_NULLFUNC && sta == NULL &&
+		   memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
+
+		if (local->hostapd) {
+			prism2_rx_80211(local->apdev, skb, rx_stats,
+					PRISM2_RX_NON_ASSOC);
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+		} else {
+			/* At least Lucent f/w seems to send data::nullfunc
+			 * frames with no ToDS flag when the current AP returns
+			 * after being unavailable for some time. Speed up
+			 * re-association by informing the station about it not
+			 * being associated. */
+			printk(KERN_DEBUG "%s: rejected received nullfunc "
+			       "frame without ToDS from not associated STA "
+			       MACSTR "\n",
+			       dev->name, MAC2STR(hdr->addr2));
+			hostap_rx(dev, skb, rx_stats);
+#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
+		}
+		ret = AP_RX_EXIT;
+		goto out;
+	} else if (stype == WLAN_FC_STYPE_NULLFUNC) {
+		/* At least Lucent cards seem to send periodic nullfunc
+		 * frames with ToDS. Let these through to update SQ
+		 * stats and PS state. Nullfunc frames do not contain
+		 * any data and they will be dropped below. */
+	} else {
+		/* If BSSID (Addr3) is foreign, this frame is a normal
+		 * broadcast frame from an IBSS network. Drop it silently.
+		 * If BSSID is own, report the dropping of this frame. */
+		if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
+			printk(KERN_DEBUG "%s: dropped received packet from "
+			       MACSTR " with no ToDS flag (type=0x%02x, "
+			       "subtype=0x%02x)\n", dev->name,
+			       MAC2STR(hdr->addr2), type, stype);
+			hostap_dump_rx_80211(dev->name, skb, rx_stats);
+		}
+		ret = AP_RX_DROP;
+		goto out;
+	}
+
+	if (sta) {
+		hostap_update_sta_ps2(local, sta, fc & WLAN_FC_PWRMGT,
+				      type, stype);
+
+		sta->rx_packets++;
+		sta->rx_bytes += skb->len;
+		sta->last_rx = jiffies;
+	}
+
+	if (local->ap->nullfunc_ack && stype == WLAN_FC_STYPE_NULLFUNC &&
+	    fc & WLAN_FC_TODS) {
+		if (local->hostapd) {
+			prism2_rx_80211(local->apdev, skb, rx_stats,
+					PRISM2_RX_NULLFUNC_ACK);
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+		} else {
+			/* some STA f/w's seem to require control::ACK frame
+			 * for data::nullfunc, but Prism2 f/w 0.8.0 (at least
+			 * from Compaq) does not send this.. Try to generate
+			 * ACK for these frames from the host driver to make
+			 * power saving work with, e.g., Lucent WaveLAN f/w */
+			hostap_rx(dev, skb, rx_stats);
+#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
+		}
+		ret = AP_RX_EXIT;
+		goto out;
+	}
+
+ out:
+	if (sta)
+		atomic_dec(&sta->users);
+
+	return ret;
+}
+
+
+/* Called only as a tasklet (software IRQ) */
+int hostap_handle_sta_crypto(local_info_t *local,
+			     struct hostap_ieee80211_hdr *hdr,
+			     struct prism2_crypt_data **crypt, void **sta_ptr)
+{
+	struct sta_info *sta;
+
+	spin_lock(&local->ap->sta_table_lock);
+	sta = ap_get_sta(local->ap, hdr->addr2);
+	if (sta)
+		atomic_inc(&sta->users);
+	spin_unlock(&local->ap->sta_table_lock);
+
+	if (!sta)
+		return -1;
+
+	if (sta->crypt) {
+		*crypt = sta->crypt;
+		*sta_ptr = sta;
+		/* hostap_handle_sta_release() will be called to release STA
+		 * info */
+	} else
+		atomic_dec(&sta->users);
+
+	return 0;
+}
+
+
+/* Called only as a tasklet (software IRQ) */
+int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr)
+{
+	struct sta_info *sta;
+	int ret = 0;
+
+	spin_lock(&ap->sta_table_lock);
+	sta = ap_get_sta(ap, sta_addr);
+	if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap)
+		ret = 1;
+	spin_unlock(&ap->sta_table_lock);
+
+	return ret;
+}
+
+
+/* Called only as a tasklet (software IRQ) */
+int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr)
+{
+	struct sta_info *sta;
+	int ret = 0;
+
+	spin_lock(&ap->sta_table_lock);
+	sta = ap_get_sta(ap, sta_addr);
+	if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap &&
+	    ((sta->flags & WLAN_STA_AUTHORIZED) ||
+	     ap->local->ieee_802_1x == 0))
+		ret = 1;
+	spin_unlock(&ap->sta_table_lock);
+
+	return ret;
+}
+
+
+/* Called only as a tasklet (software IRQ) */
+int hostap_add_sta(struct ap_data *ap, u8 *sta_addr)
+{
+	struct sta_info *sta;
+	int ret = 1;
+
+	if (!ap)
+		return -1;
+
+	spin_lock(&ap->sta_table_lock);
+	sta = ap_get_sta(ap, sta_addr);
+	if (sta)
+		ret = 0;
+	spin_unlock(&ap->sta_table_lock);
+
+	if (ret == 1) {
+		sta = ap_add_sta(ap, sta_addr);
+		if (!sta)
+			ret = -1;
+		sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
+		sta->ap = 1;
+		memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
+		/* No way of knowing which rates are supported since we did not
+		 * get supported rates element from beacon/assoc req. Assume
+		 * that remote end supports all 802.11b rates. */
+		sta->supported_rates[0] = 0x82;
+		sta->supported_rates[1] = 0x84;
+		sta->supported_rates[2] = 0x0b;
+		sta->supported_rates[3] = 0x16;
+		sta->tx_supp_rates = WLAN_RATE_1M | WLAN_RATE_2M |
+			WLAN_RATE_5M5 | WLAN_RATE_11M;
+		sta->tx_rate = 110;
+		sta->tx_max_rate = sta->tx_rate_idx = 3;
+	}
+
+	return ret;
+}
+
+
+/* Called only as a tasklet (software IRQ) */
+int hostap_update_rx_stats(struct ap_data *ap,
+			   struct hostap_ieee80211_hdr *hdr,
+			   struct hostap_80211_rx_status *rx_stats)
+{
+	struct sta_info *sta;
+
+	if (!ap)
+		return -1;
+
+	spin_lock(&ap->sta_table_lock);
+	sta = ap_get_sta(ap, hdr->addr2);
+	if (sta) {
+		sta->last_rx_silence = rx_stats->noise;
+		sta->last_rx_signal = rx_stats->signal;
+		sta->last_rx_rate = rx_stats->rate;
+		sta->last_rx_updated = 7;
+		if (rx_stats->rate == 10)
+			sta->rx_count[0]++;
+		else if (rx_stats->rate == 20)
+			sta->rx_count[1]++;
+		else if (rx_stats->rate == 55)
+			sta->rx_count[2]++;
+		else if (rx_stats->rate == 110)
+			sta->rx_count[3]++;
+	}
+	spin_unlock(&ap->sta_table_lock);
+
+	return sta ? 0 : -1;
+}
+
+
+void hostap_update_rates(local_info_t *local)
+{
+	struct list_head *ptr;
+	struct ap_data *ap = local->ap;
+
+	if (!ap)
+		return;
+
+	spin_lock_bh(&ap->sta_table_lock);
+	for (ptr = ap->sta_list.next; ptr != &ap->sta_list; ptr = ptr->next) {
+		struct sta_info *sta = (struct sta_info *) ptr;
+		prism2_check_tx_rates(sta);
+	}
+	spin_unlock_bh(&ap->sta_table_lock);
+}
+
+
+static void * ap_crypt_get_ptrs(struct ap_data *ap, u8 *addr, int permanent,
+				struct prism2_crypt_data ***crypt)
+{
+	struct sta_info *sta;
+
+	spin_lock_bh(&ap->sta_table_lock);
+	sta = ap_get_sta(ap, addr);
+	if (sta)
+		atomic_inc(&sta->users);
+	spin_unlock_bh(&ap->sta_table_lock);
+
+	if (!sta && permanent)
+		sta = ap_add_sta(ap, addr);
+
+	if (!sta)
+		return NULL;
+
+	if (permanent)
+		sta->flags |= WLAN_STA_PERM;
+
+	*crypt = &sta->crypt;
+
+	return sta;
+}
+
+
+void hostap_add_wds_links(local_info_t *local)
+{
+	struct ap_data *ap = local->ap;
+	struct list_head *ptr;
+
+	spin_lock_bh(&ap->sta_table_lock);
+	list_for_each(ptr, &ap->sta_list) {
+		struct sta_info *sta = list_entry(ptr, struct sta_info, list);
+		if (sta->ap)
+			hostap_wds_link_oper(local, sta->addr, WDS_ADD);
+	}
+	spin_unlock_bh(&ap->sta_table_lock);
+
+	schedule_work(&local->ap->wds_oper_queue);
+}
+
+
+void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type)
+{
+	struct wds_oper_data *entry;
+
+	entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
+	if (!entry)
+		return;
+	memcpy(entry->addr, addr, ETH_ALEN);
+	entry->type = type;
+	spin_lock_bh(&local->lock);
+	entry->next = local->ap->wds_oper_entries;
+	local->ap->wds_oper_entries = entry;
+	spin_unlock_bh(&local->lock);
+
+	schedule_work(&local->ap->wds_oper_queue);
+}
+
+
+EXPORT_SYMBOL(hostap_init_data);
+EXPORT_SYMBOL(hostap_init_ap_proc);
+EXPORT_SYMBOL(hostap_free_data);
+EXPORT_SYMBOL(hostap_check_sta_fw_version);
+EXPORT_SYMBOL(hostap_handle_sta_tx);
+EXPORT_SYMBOL(hostap_handle_sta_release);
+EXPORT_SYMBOL(hostap_handle_sta_tx_exc);
+EXPORT_SYMBOL(hostap_update_sta_ps);
+EXPORT_SYMBOL(hostap_handle_sta_rx);
+EXPORT_SYMBOL(hostap_is_sta_assoc);
+EXPORT_SYMBOL(hostap_is_sta_authorized);
+EXPORT_SYMBOL(hostap_add_sta);
+EXPORT_SYMBOL(hostap_update_rates);
+EXPORT_SYMBOL(hostap_add_wds_links);
+EXPORT_SYMBOL(hostap_wds_link_oper);
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+EXPORT_SYMBOL(hostap_deauth_all_stas);
+#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */