Add HostAP wireless driver.

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

1 files changed, 1207 insertions, 0 deletions

diff --git a/drivers/net/wireless/hostap/hostap.c b/drivers/net/wireless/hostap/hostap.c
new file mode 100644
index 000000000000..4fe8017b877c
--- /dev/null
+++ b/drivers/net/wireless/hostap/hostap.c
@@ -0,0 +1,1207 @@
+/*
+ * Host AP (software wireless LAN access point) driver for
+ * Intersil Prism2/2.5/3 - hostap.o module, common routines
+ *
+ * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
+ * <jkmaline@cc.hut.fi>
+ * Copyright (c) 2002-2004, Jouni Malinen <jkmaline@cc.hut.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation. See README and COPYING for
+ * more details.
+ */
+
+#ifndef EXPORT_SYMTAB
+#define EXPORT_SYMTAB
+#endif
+
+#include <linux/config.h>
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/proc_fs.h>
+#include <linux/if_arp.h>
+#include <linux/delay.h>
+#include <linux/random.h>
+#include <linux/workqueue.h>
+#include <linux/kmod.h>
+#include <linux/rtnetlink.h>
+#include <linux/wireless.h>
+#include <net/iw_handler.h>
+#include <asm/uaccess.h>
+
+#include "hostap_wlan.h"
+#include "hostap_80211.h"
+#include "hostap_ap.h"
+#include "hostap.h"
+#include "hostap_crypt.h"
+
+MODULE_AUTHOR("Jouni Malinen");
+MODULE_DESCRIPTION("Host AP common routines");
+MODULE_LICENSE("GPL");
+
+/* Old hostap_crypt module is now part of hostap module. */
+#include "hostap_crypt.c"
+
+#define TX_TIMEOUT (2 * HZ)
+
+#define PRISM2_MAX_FRAME_SIZE 2304
+#define PRISM2_MIN_MTU 256
+/* FIX: */
+#define PRISM2_MAX_MTU (PRISM2_MAX_FRAME_SIZE - (6 /* LLC */ + 8 /* WEP */))
+
+
+/* hostap.c */
+static int prism2_wds_add(local_info_t *local, u8 *remote_addr,
+                          int rtnl_locked);
+static int prism2_wds_del(local_info_t *local, u8 *remote_addr,
+                          int rtnl_locked, int do_not_remove);
+
+/* hostap_ap.c */
+static int prism2_ap_get_sta_qual(local_info_t *local, struct sockaddr addr[],
+                                  struct iw_quality qual[], int buf_size,
+                                  int aplist);
+static int prism2_ap_translate_scan(struct net_device *dev, char *buffer);
+static int prism2_hostapd(struct ap_data *ap,
+                          struct prism2_hostapd_param *param);
+static void * ap_crypt_get_ptrs(struct ap_data *ap, u8 *addr, int permanent,
+                                struct prism2_crypt_data ***crypt);
+static void ap_control_kickall(struct ap_data *ap);
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+static int ap_control_add_mac(struct mac_restrictions *mac_restrictions,
+                              u8 *mac);
+static int ap_control_del_mac(struct mac_restrictions *mac_restrictions,
+                              u8 *mac);
+static void ap_control_flush_macs(struct mac_restrictions *mac_restrictions);
+static int ap_control_kick_mac(struct ap_data *ap, struct net_device *dev,
+                               u8 *mac);
+#endif /* !PRISM2_NO_KERNEL_IEEE80211_MGMT */
+
+
+static const long freq_list[] = { 2412, 2417, 2422, 2427, 2432, 2437, 2442,
+                                  2447, 2452, 2457, 2462, 2467, 2472, 2484 };
+#define FREQ_COUNT (sizeof(freq_list) / sizeof(freq_list[0]))
+
+
+/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
+/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
+static unsigned char rfc1042_header[] =
+{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
+/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
+static unsigned char bridge_tunnel_header[] =
+{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
+/* No encapsulation header if EtherType < 0x600 (=length) */
+
+
+/* FIX: these could be compiled separately and linked together to hostap.o */
+#include "hostap_ap.c"
+#include "hostap_info.c"
+#include "hostap_ioctl.c"
+#include "hostap_proc.c"
+#include "hostap_80211_rx.c"
+#include "hostap_80211_tx.c"
+
+
+struct net_device * hostap_add_interface(struct local_info *local,
+                                         int type, int rtnl_locked,
+                                         const char *prefix,
+                                         const char *name)
+{
+        struct net_device *dev, *mdev;
+        struct hostap_interface *iface;
+        int ret;
+
+        dev = alloc_etherdev(sizeof(struct hostap_interface));
+        if (dev == NULL)
+                return NULL;
+
+        iface = netdev_priv(dev);
+        iface->dev = dev;
+        iface->local = local;
+        iface->type = type;
+        list_add(&iface->list, &local->hostap_interfaces);
+
+        mdev = local->dev;
+        memcpy(dev->dev_addr, mdev->dev_addr, ETH_ALEN);
+        dev->base_addr = mdev->base_addr;
+        dev->irq = mdev->irq;
+        dev->mem_start = mdev->mem_start;
+        dev->mem_end = mdev->mem_end;
+
+        hostap_setup_dev(dev, local, 0);
+        dev->destructor = free_netdev;
+
+        sprintf(dev->name, "%s%s", prefix, name);
+        if (!rtnl_locked)
+                rtnl_lock();
+
+        ret = 0;
+        if (strchr(dev->name, '%'))
+                ret = dev_alloc_name(dev, dev->name);
+
+        if (ret >= 0)
+                ret = register_netdevice(dev);
+
+        if (!rtnl_locked)
+                rtnl_unlock();
+
+        if (ret < 0) {
+                printk(KERN_WARNING "%s: failed to add new netdevice!\n",
+                       dev->name);
+                free_netdev(dev);
+                return NULL;
+        }
+
+        printk(KERN_DEBUG "%s: registered netdevice %s\n",
+               mdev->name, dev->name);
+
+        return dev;
+}
+
+
+void hostap_remove_interface(struct net_device *dev, int rtnl_locked,
+                             int remove_from_list)
+{
+        struct hostap_interface *iface;
+
+        if (!dev)
+                return;
+
+        iface = netdev_priv(dev);
+
+        if (remove_from_list) {
+                list_del(&iface->list);
+        }
+
+        if (dev == iface->local->ddev)
+                iface->local->ddev = NULL;
+        else if (dev == iface->local->apdev)
+                iface->local->apdev = NULL;
+        else if (dev == iface->local->stadev)
+                iface->local->stadev = NULL;
+
+        if (rtnl_locked)
+                unregister_netdevice(dev);
+        else
+                unregister_netdev(dev);
+
+        /* dev->destructor = free_netdev() will free the device data, including
+         * private data, when removing the device */
+}
+
+
+static inline int prism2_wds_special_addr(u8 *addr)
+{
+        if (addr[0] || addr[1] || addr[2] || addr[3] || addr[4] || addr[5])
+                return 0;
+
+        return 1;
+}
+
+
+static int prism2_wds_add(local_info_t *local, u8 *remote_addr,
+                          int rtnl_locked)
+{
+        struct net_device *dev;
+        struct list_head *ptr;
+        struct hostap_interface *iface, *empty, *match;
+
+        empty = match = NULL;
+        read_lock_bh(&local->iface_lock);
+        list_for_each(ptr, &local->hostap_interfaces) {
+                iface = list_entry(ptr, struct hostap_interface, list);
+                if (iface->type != HOSTAP_INTERFACE_WDS)
+                        continue;
+
+                if (prism2_wds_special_addr(iface->u.wds.remote_addr))
+                        empty = iface;
+                else if (memcmp(iface->u.wds.remote_addr, remote_addr,
+                                ETH_ALEN) == 0) {
+                        match = iface;
+                        break;
+                }
+        }
+        if (!match && empty && !prism2_wds_special_addr(remote_addr)) {
+                /* take pre-allocated entry into use */
+                memcpy(empty->u.wds.remote_addr, remote_addr, ETH_ALEN);
+                read_unlock_bh(&local->iface_lock);
+                printk(KERN_DEBUG "%s: using pre-allocated WDS netdevice %s\n",
+                       local->dev->name, empty->dev->name);
+                return 0;
+        }
+        read_unlock_bh(&local->iface_lock);
+
+        if (!prism2_wds_special_addr(remote_addr)) {
+                if (match)
+                        return -EEXIST;
+                hostap_add_sta(local->ap, remote_addr);
+        }
+
+        if (local->wds_connections >= local->wds_max_connections)
+                return -ENOBUFS;
+
+        /* verify that there is room for wds# postfix in the interface name */
+        if (strlen(local->dev->name) > IFNAMSIZ - 5) {
+                printk(KERN_DEBUG "'%s' too long base device name\n",
+                       local->dev->name);
+                return -EINVAL;
+        }
+
+        dev = hostap_add_interface(local, HOSTAP_INTERFACE_WDS, rtnl_locked,
+                                   local->ddev->name, "wds%d");
+        if (dev == NULL)
+                return -ENOMEM;
+
+        iface = netdev_priv(dev);
+        memcpy(iface->u.wds.remote_addr, remote_addr, ETH_ALEN);
+
+        local->wds_connections++;
+
+        return 0;
+}
+
+
+static int prism2_wds_del(local_info_t *local, u8 *remote_addr,
+                          int rtnl_locked, int do_not_remove)
+{
+        unsigned long flags;
+        struct list_head *ptr;
+        struct hostap_interface *iface, *selected = NULL;
+
+        write_lock_irqsave(&local->iface_lock, flags);
+        list_for_each(ptr, &local->hostap_interfaces) {
+                iface = list_entry(ptr, struct hostap_interface, list);
+                if (iface->type != HOSTAP_INTERFACE_WDS)
+                        continue;
+
+                if (memcmp(iface->u.wds.remote_addr, remote_addr,
+                           ETH_ALEN) == 0) {
+                        selected = iface;
+                        break;
+                }
+        }
+        if (selected && !do_not_remove)
+                list_del(&selected->list);
+        write_unlock_irqrestore(&local->iface_lock, flags);
+
+        if (selected) {
+                if (do_not_remove)
+                        memset(selected->u.wds.remote_addr, 0, ETH_ALEN);
+                else {
+                        hostap_remove_interface(selected->dev, rtnl_locked, 0);
+                        local->wds_connections--;
+                }
+        }
+
+        return selected ? 0 : -ENODEV;
+}
+
+
+u16 hostap_tx_callback_register(local_info_t *local,
+                                void (*func)(struct sk_buff *, int ok, void *),
+                                void *data)
+{
+        unsigned long flags;
+        struct hostap_tx_callback_info *entry;
+
+        entry = (struct hostap_tx_callback_info *) kmalloc(sizeof(*entry),
+                                                           GFP_ATOMIC);
+        if (entry == NULL)
+                return 0;
+
+        entry->func = func;
+        entry->data = data;
+
+        spin_lock_irqsave(&local->lock, flags);
+        entry->idx = local->tx_callback ? local->tx_callback->idx + 1 : 1;
+        entry->next = local->tx_callback;
+        local->tx_callback = entry;
+        spin_unlock_irqrestore(&local->lock, flags);
+
+        return entry->idx;
+}
+
+
+int hostap_tx_callback_unregister(local_info_t *local, u16 idx)
+{
+        unsigned long flags;
+        struct hostap_tx_callback_info *cb, *prev = NULL;
+
+        spin_lock_irqsave(&local->lock, flags);
+        cb = local->tx_callback;
+        while (cb != NULL && cb->idx != idx) {
+                prev = cb;
+                cb = cb->next;
+        }
+        if (cb) {
+                if (prev == NULL)
+                        local->tx_callback = cb->next;
+                else
+                        prev->next = cb->next;
+                kfree(cb);
+        }
+        spin_unlock_irqrestore(&local->lock, flags);
+
+        return cb ? 0 : -1;
+}
+
+
+/* val is in host byte order */
+int hostap_set_word(struct net_device *dev, int rid, u16 val)
+{
+        struct hostap_interface *iface;
+        u16 tmp = cpu_to_le16(val);
+        iface = netdev_priv(dev);
+        return iface->local->func->set_rid(dev, rid, &tmp, 2);
+}
+
+
+int hostap_set_string(struct net_device *dev, int rid, const char *val)
+{
+        struct hostap_interface *iface;
+        char buf[MAX_SSID_LEN + 2];
+        int len;
+
+        iface = netdev_priv(dev);
+        len = strlen(val);
+        if (len > MAX_SSID_LEN)
+                return -1;
+        memset(buf, 0, sizeof(buf));
+        buf[0] = len; /* little endian 16 bit word */
+        memcpy(buf + 2, val, len);
+
+        return iface->local->func->set_rid(dev, rid, &buf, MAX_SSID_LEN + 2);
+}
+
+
+u16 hostap_get_porttype(local_info_t *local)
+{
+        if (local->iw_mode == IW_MODE_ADHOC && local->pseudo_adhoc)
+                return HFA384X_PORTTYPE_PSEUDO_IBSS;
+        if (local->iw_mode == IW_MODE_ADHOC)
+                return HFA384X_PORTTYPE_IBSS;
+        if (local->iw_mode == IW_MODE_INFRA)
+                return HFA384X_PORTTYPE_BSS;
+        if (local->iw_mode == IW_MODE_REPEAT)
+                return HFA384X_PORTTYPE_WDS;
+        if (local->iw_mode == IW_MODE_MONITOR)
+                return HFA384X_PORTTYPE_PSEUDO_IBSS;
+        return HFA384X_PORTTYPE_HOSTAP;
+}
+
+
+int hostap_set_encryption(local_info_t *local)
+{
+        u16 val, old_val;
+        int i, keylen, len, idx;
+        char keybuf[WEP_KEY_LEN + 1];
+        enum { NONE, WEP, OTHER } encrypt_type;
+
+        idx = local->tx_keyidx;
+        if (local->crypt[idx] == NULL || local->crypt[idx]->ops == NULL)
+                encrypt_type = NONE;
+        else if (strcmp(local->crypt[idx]->ops->name, "WEP") == 0)
+                encrypt_type = WEP;
+        else
+                encrypt_type = OTHER;
+
+        if (local->func->get_rid(local->dev, HFA384X_RID_CNFWEPFLAGS, &val, 2,
+                                 1) < 0) {
+                printk(KERN_DEBUG "Could not read current WEP flags.\n");
+                goto fail;
+        }
+        le16_to_cpus(&val);
+        old_val = val;
+
+        if (encrypt_type != NONE || local->privacy_invoked)
+                val |= HFA384X_WEPFLAGS_PRIVACYINVOKED;
+        else
+                val &= ~HFA384X_WEPFLAGS_PRIVACYINVOKED;
+
+        if (local->open_wep || encrypt_type == NONE ||
+            ((local->ieee_802_1x || local->wpa) && local->host_decrypt))
+                val &= ~HFA384X_WEPFLAGS_EXCLUDEUNENCRYPTED;
+        else
+                val |= HFA384X_WEPFLAGS_EXCLUDEUNENCRYPTED;
+
+        if ((encrypt_type != NONE || local->privacy_invoked) &&
+            (encrypt_type == OTHER || local->host_encrypt))
+                val |= HFA384X_WEPFLAGS_HOSTENCRYPT;
+        else
+                val &= ~HFA384X_WEPFLAGS_HOSTENCRYPT;
+        if ((encrypt_type != NONE || local->privacy_invoked) &&
+            (encrypt_type == OTHER || local->host_decrypt))
+                val |= HFA384X_WEPFLAGS_HOSTDECRYPT;
+        else
+                val &= ~HFA384X_WEPFLAGS_HOSTDECRYPT;
+
+        if (val != old_val &&
+            hostap_set_word(local->dev, HFA384X_RID_CNFWEPFLAGS, val)) {
+                printk(KERN_DEBUG "Could not write new WEP flags (0x%x)\n",
+                       val);
+                goto fail;
+        }
+
+        if (encrypt_type != WEP)
+                return 0;
+
+        /* 104-bit support seems to require that all the keys are set to the
+         * same keylen */
+        keylen = 6; /* first 5 octets */
+        len = local->crypt[idx]->ops->get_key(keybuf, sizeof(keybuf),
+                                              NULL, local->crypt[idx]->priv);
+        if (idx >= 0 && idx < WEP_KEYS && len > 5)
+                keylen = WEP_KEY_LEN + 1; /* first 13 octets */
+
+        for (i = 0; i < WEP_KEYS; i++) {
+                memset(keybuf, 0, sizeof(keybuf));
+                if (local->crypt[i]) {
+                        (void) local->crypt[i]->ops->get_key(
+                                keybuf, sizeof(keybuf),
+                                NULL, local->crypt[i]->priv);
+                }
+                if (local->func->set_rid(local->dev,
+                                         HFA384X_RID_CNFDEFAULTKEY0 + i,
+                                         keybuf, keylen)) {
+                        printk(KERN_DEBUG "Could not set key %d (len=%d)\n",
+                               i, keylen);
+                        goto fail;
+                }
+        }
+        if (hostap_set_word(local->dev, HFA384X_RID_CNFWEPDEFAULTKEYID, idx)) {
+                printk(KERN_DEBUG "Could not set default keyid %d\n", idx);
+                goto fail;
+        }
+
+        return 0;
+
+ fail:
+        printk(KERN_DEBUG "%s: encryption setup failed\n", local->dev->name);
+        return -1;
+}
+
+
+int hostap_set_antsel(local_info_t *local)
+{
+        u16 val;
+        int ret = 0;
+
+        if (local->antsel_tx != HOSTAP_ANTSEL_DO_NOT_TOUCH &&
+            local->func->cmd(local->dev, HFA384X_CMDCODE_READMIF,
+                             HFA386X_CR_TX_CONFIGURE,
+                             NULL, &val) == 0) {
+                val &= ~(BIT(2) | BIT(1));
+                switch (local->antsel_tx) {
+                case HOSTAP_ANTSEL_DIVERSITY:
+                        val |= BIT(1);
+                        break;
+                case HOSTAP_ANTSEL_LOW:
+                        break;
+                case HOSTAP_ANTSEL_HIGH:
+                        val |= BIT(2);
+                        break;
+                }
+
+                if (local->func->cmd(local->dev, HFA384X_CMDCODE_WRITEMIF,
+                                     HFA386X_CR_TX_CONFIGURE, &val, NULL)) {
+                        printk(KERN_INFO "%s: setting TX AntSel failed\n",
+                               local->dev->name);
+                        ret = -1;
+                }
+        }
+
+        if (local->antsel_rx != HOSTAP_ANTSEL_DO_NOT_TOUCH &&
+            local->func->cmd(local->dev, HFA384X_CMDCODE_READMIF,
+                             HFA386X_CR_RX_CONFIGURE,
+                             NULL, &val) == 0) {
+                val &= ~(BIT(1) | BIT(0));
+                switch (local->antsel_rx) {
+                case HOSTAP_ANTSEL_DIVERSITY:
+                        break;
+                case HOSTAP_ANTSEL_LOW:
+                        val |= BIT(0);
+                        break;
+                case HOSTAP_ANTSEL_HIGH:
+                        val |= BIT(0) | BIT(1);
+                        break;
+                }
+
+                if (local->func->cmd(local->dev, HFA384X_CMDCODE_WRITEMIF,
+                                     HFA386X_CR_RX_CONFIGURE, &val, NULL)) {
+                        printk(KERN_INFO "%s: setting RX AntSel failed\n",
+                               local->dev->name);
+                        ret = -1;
+                }
+        }
+
+        return ret;
+}
+
+
+int hostap_set_roaming(local_info_t *local)
+{
+        u16 val;
+
+        switch (local->host_roaming) {
+        case 1:
+                val = HFA384X_ROAMING_HOST;
+                break;
+        case 2:
+                val = HFA384X_ROAMING_DISABLED;
+                break;
+        case 0:
+        default:
+                val = HFA384X_ROAMING_FIRMWARE;
+                break;
+        }
+
+        return hostap_set_word(local->dev, HFA384X_RID_CNFROAMINGMODE, val);
+}
+
+
+int hostap_set_auth_algs(local_info_t *local)
+{
+        int val = local->auth_algs;
+        /* At least STA f/w v0.6.2 seems to have issues with cnfAuthentication
+         * set to include both Open and Shared Key flags. It tries to use
+         * Shared Key authentication in that case even if WEP keys are not
+         * configured.. STA f/w v0.7.6 is able to handle such configuration,
+         * but it is unknown when this was fixed between 0.6.2 .. 0.7.6. */
+        if (local->sta_fw_ver < PRISM2_FW_VER(0,7,0) &&
+            val != PRISM2_AUTH_OPEN && val != PRISM2_AUTH_SHARED_KEY)
+                val = PRISM2_AUTH_OPEN;
+
+        if (hostap_set_word(local->dev, HFA384X_RID_CNFAUTHENTICATION, val)) {
+                printk(KERN_INFO "%s: cnfAuthentication setting to 0x%x "
+                       "failed\n", local->dev->name, local->auth_algs);
+                return -EINVAL;
+        }
+
+        return 0;
+}
+
+
+void hostap_dump_rx_header(const char *name, const struct hfa384x_rx_frame *rx)
+{
+        u16 status, fc;
+
+        status = __le16_to_cpu(rx->status);
+
+        printk(KERN_DEBUG "%s: RX status=0x%04x (port=%d, type=%d, "
+               "fcserr=%d) silence=%d signal=%d rate=%d rxflow=%d; "
+               "jiffies=%ld\n",
+               name, status, (status >> 8) & 0x07, status >> 13, status & 1,
+               rx->silence, rx->signal, rx->rate, rx->rxflow, jiffies);
+
+        fc = __le16_to_cpu(rx->frame_control);
+        printk(KERN_DEBUG "   FC=0x%04x (type=%d:%d) dur=0x%04x seq=0x%04x "
+               "data_len=%d%s%s\n",
+               fc, WLAN_FC_GET_TYPE(fc), WLAN_FC_GET_STYPE(fc),
+               __le16_to_cpu(rx->duration_id), __le16_to_cpu(rx->seq_ctrl),
+               __le16_to_cpu(rx->data_len),
+               fc & WLAN_FC_TODS ? " [ToDS]" : "",
+               fc & WLAN_FC_FROMDS ? " [FromDS]" : "");
+
+        printk(KERN_DEBUG "   A1=" MACSTR " A2=" MACSTR " A3=" MACSTR " A4="
+               MACSTR "\n",
+               MAC2STR(rx->addr1), MAC2STR(rx->addr2), MAC2STR(rx->addr3),
+               MAC2STR(rx->addr4));
+
+        printk(KERN_DEBUG "   dst=" MACSTR " src=" MACSTR " len=%d\n",
+               MAC2STR(rx->dst_addr), MAC2STR(rx->src_addr),
+               __be16_to_cpu(rx->len));
+}
+
+
+void hostap_dump_tx_header(const char *name, const struct hfa384x_tx_frame *tx)
+{
+        u16 fc;
+
+        printk(KERN_DEBUG "%s: TX status=0x%04x retry_count=%d tx_rate=%d "
+               "tx_control=0x%04x; jiffies=%ld\n",
+               name, __le16_to_cpu(tx->status), tx->retry_count, tx->tx_rate,
+               __le16_to_cpu(tx->tx_control), jiffies);
+
+        fc = __le16_to_cpu(tx->frame_control);
+        printk(KERN_DEBUG "   FC=0x%04x (type=%d:%d) dur=0x%04x seq=0x%04x "
+               "data_len=%d%s%s\n",
+               fc, WLAN_FC_GET_TYPE(fc), WLAN_FC_GET_STYPE(fc),
+               __le16_to_cpu(tx->duration_id), __le16_to_cpu(tx->seq_ctrl),
+               __le16_to_cpu(tx->data_len),
+               fc & WLAN_FC_TODS ? " [ToDS]" : "",
+               fc & WLAN_FC_FROMDS ? " [FromDS]" : "");
+
+        printk(KERN_DEBUG "   A1=" MACSTR " A2=" MACSTR " A3=" MACSTR " A4="
+               MACSTR "\n",
+               MAC2STR(tx->addr1), MAC2STR(tx->addr2), MAC2STR(tx->addr3),
+               MAC2STR(tx->addr4));
+
+        printk(KERN_DEBUG "   dst=" MACSTR " src=" MACSTR " len=%d\n",
+               MAC2STR(tx->dst_addr), MAC2STR(tx->src_addr),
+               __be16_to_cpu(tx->len));
+}
+
+
+int hostap_80211_header_parse(struct sk_buff *skb, unsigned char *haddr)
+{
+        memcpy(haddr, skb->mac.raw + 10, ETH_ALEN); /* addr2 */
+        return ETH_ALEN;
+}
+
+
+int hostap_80211_prism_header_parse(struct sk_buff *skb, unsigned char *haddr)
+{
+        if (*(u32 *)skb->mac.raw == LWNG_CAP_DID_BASE) {
+                memcpy(haddr, skb->mac.raw +
+                       sizeof(struct linux_wlan_ng_prism_hdr) + 10,
+                       ETH_ALEN); /* addr2 */
+        } else { /* (*(u32 *)skb->mac.raw == htonl(LWNG_CAPHDR_VERSION)) */
+                memcpy(haddr, skb->mac.raw +
+                       sizeof(struct linux_wlan_ng_cap_hdr) + 10,
+                       ETH_ALEN); /* addr2 */
+        }
+        return ETH_ALEN;
+}
+
+
+int hostap_80211_get_hdrlen(u16 fc)
+{
+        int hdrlen = 24;
+
+        switch (WLAN_FC_GET_TYPE(fc)) {
+        case WLAN_FC_TYPE_DATA:
+                if ((fc & WLAN_FC_FROMDS) && (fc & WLAN_FC_TODS))
+                        hdrlen = 30; /* Addr4 */
+                break;
+        case WLAN_FC_TYPE_CTRL:
+                switch (WLAN_FC_GET_STYPE(fc)) {
+                case WLAN_FC_STYPE_CTS:
+                case WLAN_FC_STYPE_ACK:
+                        hdrlen = 10;
+                        break;
+                default:
+                        hdrlen = 16;
+                        break;
+                }
+                break;
+        }
+
+        return hdrlen;
+}
+
+
+struct net_device_stats *hostap_get_stats(struct net_device *dev)
+{
+        struct hostap_interface *iface;
+        iface = netdev_priv(dev);
+        return &iface->stats;
+}
+
+
+static int prism2_close(struct net_device *dev)
+{
+        struct hostap_interface *iface;
+        local_info_t *local;
+
+        PDEBUG(DEBUG_FLOW, "%s: prism2_close\n", dev->name);
+
+        iface = netdev_priv(dev);
+        local = iface->local;
+
+        if (dev == local->ddev) {
+                prism2_sta_deauth(local, WLAN_REASON_DEAUTH_LEAVING);
+        }
+#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
+        if (!local->hostapd && dev == local->dev &&
+            (!local->func->card_present || local->func->card_present(local)) &&
+            local->hw_ready && local->ap && local->iw_mode == IW_MODE_MASTER)
+                hostap_deauth_all_stas(dev, local->ap, 1);
+#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
+
+        if (local->func->dev_close && local->func->dev_close(local))
+                return 0;
+
+        if (dev == local->dev) {
+                local->func->hw_shutdown(dev, HOSTAP_HW_ENABLE_CMDCOMPL);
+        }
+
+        if (netif_running(dev)) {
+                netif_stop_queue(dev);
+                netif_device_detach(dev);
+        }
+
+        flush_scheduled_work();
+
+        module_put(local->hw_module);
+
+        local->num_dev_open--;
+
+        if (dev != local->dev && local->dev->flags & IFF_UP &&
+            local->master_dev_auto_open && local->num_dev_open == 1) {
+                /* Close master radio interface automatically if it was also
+                 * opened automatically and we are now closing the last
+                 * remaining non-master device. */
+                dev_close(local->dev);
+        }
+
+        return 0;
+}
+
+
+static int prism2_open(struct net_device *dev)
+{
+        struct hostap_interface *iface;
+        local_info_t *local;
+
+        PDEBUG(DEBUG_FLOW, "%s: prism2_open\n", dev->name);
+
+        iface = netdev_priv(dev);
+        local = iface->local;
+
+        if (local->no_pri) {
+                printk(KERN_DEBUG "%s: could not set interface UP - no PRI "
+                       "f/w\n", dev->name);
+                return 1;
+        }
+
+        if ((local->func->card_present && !local->func->card_present(local)) ||
+            local->hw_downloading)
+                return -ENODEV;
+
+        if (local->func->dev_open && local->func->dev_open(local))
+                return 1;
+
+        if (!try_module_get(local->hw_module))
+                return -ENODEV;
+        local->num_dev_open++;
+
+        if (!local->dev_enabled && local->func->hw_enable(dev, 1)) {
+                printk(KERN_WARNING "%s: could not enable MAC port\n",
+                       dev->name);
+                prism2_close(dev);
+                return 1;
+        }
+        if (!local->dev_enabled)
+                prism2_callback(local, PRISM2_CALLBACK_ENABLE);
+        local->dev_enabled = 1;
+
+        if (dev != local->dev && !(local->dev->flags & IFF_UP)) {
+                /* Master radio interface is needed for all operation, so open
+                 * it automatically when any virtual net_device is opened. */
+                local->master_dev_auto_open = 1;
+                dev_open(local->dev);
+        }
+
+        netif_device_attach(dev);
+        netif_start_queue(dev);
+
+        return 0;
+}
+
+
+static int prism2_set_mac_address(struct net_device *dev, void *p)
+{
+        struct hostap_interface *iface;
+        local_info_t *local;
+        struct list_head *ptr;
+        struct sockaddr *addr = p;
+
+        iface = netdev_priv(dev);
+        local = iface->local;
+
+        if (local->func->set_rid(dev, HFA384X_RID_CNFOWNMACADDR, addr->sa_data,
+                                 ETH_ALEN) < 0 || local->func->reset_port(dev))
+                return -EINVAL;
+
+        read_lock_bh(&local->iface_lock);
+        list_for_each(ptr, &local->hostap_interfaces) {
+                iface = list_entry(ptr, struct hostap_interface, list);
+                memcpy(iface->dev->dev_addr, addr->sa_data, ETH_ALEN);
+        }
+        memcpy(local->dev->dev_addr, addr->sa_data, ETH_ALEN);
+        read_unlock_bh(&local->iface_lock);
+
+        return 0;
+}
+
+
+/* TODO: to be further implemented as soon as Prism2 fully supports
+ *       GroupAddresses and correct documentation is available */
+void hostap_set_multicast_list_queue(void *data)
+{
+        struct net_device *dev = (struct net_device *) data;
+        struct hostap_interface *iface;
+        local_info_t *local;
+
+        iface = netdev_priv(dev);
+        local = iface->local;
+        if (hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
+                            local->is_promisc)) {
+                printk(KERN_INFO "%s: %sabling promiscuous mode failed\n",
+                       dev->name, local->is_promisc ? "en" : "dis");
+        }
+}
+
+
+static void hostap_set_multicast_list(struct net_device *dev)
+{
+#if 0
+        /* FIX: promiscuous mode seems to be causing a lot of problems with
+         * some station firmware versions (FCSErr frames, invalid MACPort, etc.
+         * corrupted incoming frames). This code is now commented out while the
+         * problems are investigated. */
+        struct hostap_interface *iface;
+        local_info_t *local;
+
+        iface = netdev_priv(dev);
+        local = iface->local;
+        if ((dev->flags & IFF_ALLMULTI) || (dev->flags & IFF_PROMISC)) {
+                local->is_promisc = 1;
+        } else {
+                local->is_promisc = 0;
+        }
+
+        schedule_work(&local->set_multicast_list_queue);
+#endif
+}
+
+
+static int prism2_change_mtu(struct net_device *dev, int new_mtu)
+{
+        if (new_mtu < PRISM2_MIN_MTU || new_mtu > PRISM2_MAX_MTU)
+                return -EINVAL;
+
+        dev->mtu = new_mtu;
+        return 0;
+}
+
+
+static void prism2_tx_timeout(struct net_device *dev)
+{
+        struct hostap_interface *iface;
+        local_info_t *local;
+        struct hfa384x_regs regs;
+
+        iface = netdev_priv(dev);
+        local = iface->local;
+
+        printk(KERN_WARNING "%s Tx timed out! Resetting card\n", dev->name);
+        netif_stop_queue(local->dev);
+
+        local->func->read_regs(dev, &regs);
+        printk(KERN_DEBUG "%s: CMD=%04x EVSTAT=%04x "
+               "OFFSET0=%04x OFFSET1=%04x SWSUPPORT0=%04x\n",
+               dev->name, regs.cmd, regs.evstat, regs.offset0, regs.offset1,
+               regs.swsupport0);
+
+        local->func->schedule_reset(local);
+}
+
+
+void hostap_setup_dev(struct net_device *dev, local_info_t *local,
+                      int main_dev)
+{
+        struct hostap_interface *iface;
+
+        iface = netdev_priv(dev);
+        ether_setup(dev);
+
+        /* kernel callbacks */
+        dev->get_stats = hostap_get_stats;
+        if (iface) {
+                /* Currently, we point to the proper spy_data only on
+                 * the main_dev. This could be fixed. Jean II */
+                iface->wireless_data.spy_data = &iface->spy_data;
+                dev->wireless_data = &iface->wireless_data;
+        }
+        dev->wireless_handlers =
+                (struct iw_handler_def *) &hostap_iw_handler_def;
+        dev->do_ioctl = hostap_ioctl;
+        dev->open = prism2_open;
+        dev->stop = prism2_close;
+        dev->hard_start_xmit = hostap_data_start_xmit;
+        dev->set_mac_address = prism2_set_mac_address;
+        dev->set_multicast_list = hostap_set_multicast_list;
+        dev->change_mtu = prism2_change_mtu;
+        dev->tx_timeout = prism2_tx_timeout;
+        dev->watchdog_timeo = TX_TIMEOUT;
+
+        dev->mtu = local->mtu;
+        if (!main_dev) {
+                /* use main radio device queue */
+                dev->tx_queue_len = 0;
+        }
+
+        SET_ETHTOOL_OPS(dev, &prism2_ethtool_ops);
+
+        netif_stop_queue(dev);
+}
+
+
+static int hostap_enable_hostapd(local_info_t *local, int rtnl_locked)
+{
+        struct net_device *dev = local->dev;
+
+        if (local->apdev)
+                return -EEXIST;
+
+        printk(KERN_DEBUG "%s: enabling hostapd mode\n", dev->name);
+
+        local->apdev = hostap_add_interface(local, HOSTAP_INTERFACE_AP,
+                                            rtnl_locked, local->ddev->name,
+                                            "ap");
+        if (local->apdev == NULL)
+                return -ENOMEM;
+
+        local->apdev->hard_start_xmit = hostap_mgmt_start_xmit;
+        local->apdev->type = ARPHRD_IEEE80211;
+        local->apdev->hard_header_parse = hostap_80211_header_parse;
+
+        return 0;
+}
+
+
+static int hostap_disable_hostapd(local_info_t *local, int rtnl_locked)
+{
+        struct net_device *dev = local->dev;
+
+        printk(KERN_DEBUG "%s: disabling hostapd mode\n", dev->name);
+
+        hostap_remove_interface(local->apdev, rtnl_locked, 1);
+        local->apdev = NULL;
+
+        return 0;
+}
+
+
+static int hostap_enable_hostapd_sta(local_info_t *local, int rtnl_locked)
+{
+        struct net_device *dev = local->dev;
+
+        if (local->stadev)
+                return -EEXIST;
+
+        printk(KERN_DEBUG "%s: enabling hostapd STA mode\n", dev->name);
+
+        local->stadev = hostap_add_interface(local, HOSTAP_INTERFACE_STA,
+                                             rtnl_locked, local->ddev->name,
+                                             "sta");
+        if (local->stadev == NULL)
+                return -ENOMEM;
+
+        return 0;
+}
+
+
+static int hostap_disable_hostapd_sta(local_info_t *local, int rtnl_locked)
+{
+        struct net_device *dev = local->dev;
+
+        printk(KERN_DEBUG "%s: disabling hostapd mode\n", dev->name);
+
+        hostap_remove_interface(local->stadev, rtnl_locked, 1);
+        local->stadev = NULL;
+
+        return 0;
+}
+
+
+int hostap_set_hostapd(local_info_t *local, int val, int rtnl_locked)
+{
+        int ret;
+
+        if (val < 0 || val > 1)
+                return -EINVAL;
+
+        if (local->hostapd == val)
+                return 0;
+
+        if (val) {
+                ret = hostap_enable_hostapd(local, rtnl_locked);
+                if (ret == 0)
+                        local->hostapd = 1;
+        } else {
+                local->hostapd = 0;
+                ret = hostap_disable_hostapd(local, rtnl_locked);
+                if (ret != 0)
+                        local->hostapd = 1;
+        }
+
+        return ret;
+}
+
+
+int hostap_set_hostapd_sta(local_info_t *local, int val, int rtnl_locked)
+{
+        int ret;
+
+        if (val < 0 || val > 1)
+                return -EINVAL;
+
+        if (local->hostapd_sta == val)
+                return 0;
+
+        if (val) {
+                ret = hostap_enable_hostapd_sta(local, rtnl_locked);
+                if (ret == 0)
+                        local->hostapd_sta = 1;
+        } else {
+                local->hostapd_sta = 0;
+                ret = hostap_disable_hostapd_sta(local, rtnl_locked);
+                if (ret != 0)
+                        local->hostapd_sta = 1;
+        }
+
+
+        return ret;
+}
+
+
+int prism2_update_comms_qual(struct net_device *dev)
+{
+        struct hostap_interface *iface;
+        local_info_t *local;
+        int ret = 0;
+        struct hfa384x_comms_quality sq;
+
+        iface = netdev_priv(dev);
+        local = iface->local;
+        if (!local->sta_fw_ver)
+                ret = -1;
+        else if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1)) {
+                if (local->func->get_rid(local->dev,
+                                         HFA384X_RID_DBMCOMMSQUALITY,
+                                         &sq, sizeof(sq), 1) >= 0) {
+                        local->comms_qual = (s16) le16_to_cpu(sq.comm_qual);
+                        local->avg_signal = (s16) le16_to_cpu(sq.signal_level);
+                        local->avg_noise = (s16) le16_to_cpu(sq.noise_level);
+                        local->last_comms_qual_update = jiffies;
+                } else
+                        ret = -1;
+        } else {
+                if (local->func->get_rid(local->dev, HFA384X_RID_COMMSQUALITY,
+                                         &sq, sizeof(sq), 1) >= 0) {
+                        local->comms_qual = le16_to_cpu(sq.comm_qual);
+                        local->avg_signal = HFA384X_LEVEL_TO_dBm(
+                                le16_to_cpu(sq.signal_level));
+                        local->avg_noise = HFA384X_LEVEL_TO_dBm(
+                                le16_to_cpu(sq.noise_level));
+                        local->last_comms_qual_update = jiffies;
+                } else
+                        ret = -1;
+        }
+
+        return ret;
+}
+
+
+int prism2_sta_send_mgmt(local_info_t *local, u8 *dst, u8 stype,
+                         u8 *body, size_t bodylen)
+{
+        struct sk_buff *skb;
+        struct hostap_ieee80211_mgmt *mgmt;
+        struct hostap_skb_tx_data *meta;
+        struct net_device *dev = local->dev;
+
+        skb = dev_alloc_skb(IEEE80211_MGMT_HDR_LEN + bodylen);
+        if (skb == NULL)
+                return -ENOMEM;
+
+        mgmt = (struct hostap_ieee80211_mgmt *)
+                skb_put(skb, IEEE80211_MGMT_HDR_LEN);
+        memset(mgmt, 0, IEEE80211_MGMT_HDR_LEN);
+        mgmt->frame_control =
+                cpu_to_le16((WLAN_FC_TYPE_MGMT << 2) | (stype << 4));
+        memcpy(mgmt->da, dst, ETH_ALEN);
+        memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
+        memcpy(mgmt->bssid, dst, ETH_ALEN);
+        if (body)
+                memcpy(skb_put(skb, bodylen), body, bodylen);
+
+        meta = (struct hostap_skb_tx_data *) skb->cb;
+        memset(meta, 0, sizeof(*meta));
+        meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
+        meta->iface = netdev_priv(dev);
+
+        skb->dev = dev;
+        skb->mac.raw = skb->nh.raw = skb->data;
+        dev_queue_xmit(skb);
+
+        return 0;
+}
+
+
+int prism2_sta_deauth(local_info_t *local, u16 reason)
+{
+        union iwreq_data wrqu;
+        int ret;
+
+        if (local->iw_mode != IW_MODE_INFRA ||
+            memcmp(local->bssid, "\x00\x00\x00\x00\x00\x00", ETH_ALEN) == 0 ||
+            memcmp(local->bssid, "\x44\x44\x44\x44\x44\x44", ETH_ALEN) == 0)
+                return 0;
+
+        reason = cpu_to_le16(reason);
+        ret = prism2_sta_send_mgmt(local, local->bssid, WLAN_FC_STYPE_DEAUTH,
+                                   (u8 *) &reason, 2);
+        memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
+        wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
+        return ret;
+}
+
+
+struct proc_dir_entry *hostap_proc;
+
+static int __init hostap_init(void)
+{
+        hostap_crypto_init();
+
+        if (proc_net != NULL) {
+                hostap_proc = proc_mkdir("hostap", proc_net);
+                if (!hostap_proc)
+                        printk(KERN_WARNING "Failed to mkdir "
+                               "/proc/net/hostap\n");
+        } else
+                hostap_proc = NULL;
+
+        return 0;
+}
+
+
+static void __exit hostap_exit(void)
+{
+        if (hostap_proc != NULL) {
+                hostap_proc = NULL;
+                remove_proc_entry("hostap", proc_net);
+        }
+
+        hostap_crypto_deinit();
+}
+
+
+EXPORT_SYMBOL(hostap_set_word);
+EXPORT_SYMBOL(hostap_set_string);
+EXPORT_SYMBOL(hostap_get_porttype);
+EXPORT_SYMBOL(hostap_set_encryption);
+EXPORT_SYMBOL(hostap_set_antsel);
+EXPORT_SYMBOL(hostap_set_roaming);
+EXPORT_SYMBOL(hostap_set_auth_algs);
+EXPORT_SYMBOL(hostap_dump_rx_header);
+EXPORT_SYMBOL(hostap_dump_tx_header);
+EXPORT_SYMBOL(hostap_80211_header_parse);
+EXPORT_SYMBOL(hostap_80211_prism_header_parse);
+EXPORT_SYMBOL(hostap_80211_get_hdrlen);
+EXPORT_SYMBOL(hostap_get_stats);
+EXPORT_SYMBOL(hostap_setup_dev);
+EXPORT_SYMBOL(hostap_proc);
+EXPORT_SYMBOL(hostap_set_multicast_list_queue);
+EXPORT_SYMBOL(hostap_set_hostapd);
+EXPORT_SYMBOL(hostap_set_hostapd_sta);
+EXPORT_SYMBOL(hostap_add_interface);
+EXPORT_SYMBOL(hostap_remove_interface);
+EXPORT_SYMBOL(prism2_update_comms_qual);
+
+module_init(hostap_init);
+module_exit(hostap_exit);