// SPDX-License-Identifier: GPL-2.0
/* IEEE 802.11 SoftMAC layer
 * Copyright (c) 2005 Andrea Merello <andrea.merello@gmail.com>
 *
 * Mostly extracted from the rtl8180-sa2400 driver for the
 * in-kernel generic ieee802.11 stack.
 *
 * Few lines might be stolen from other part of the rtllib
 * stack. Copyright who own it's copyright
 *
 * WPA code stolen from the ipw2200 driver.
 * Copyright who own it's copyright.
 */
#include "rtllib.h"

#include <linux/random.h>
#include <linux/delay.h>
#include <linux/uaccess.h>
#include <linux/etherdevice.h>
#include <linux/ieee80211.h>
#include "dot11d.h"

static void rtllib_sta_wakeup(struct rtllib_device *ieee, short nl);


static short rtllib_is_54g(struct rtllib_network *net)
{
        return (net->rates_ex_len > 0) || (net->rates_len > 4);
}

/* returns the total length needed for placing the RATE MFIE
 * tag and the EXTENDED RATE MFIE tag if needed.
 * It encludes two bytes per tag for the tag itself and its len
 */
static unsigned int rtllib_MFIE_rate_len(struct rtllib_device *ieee)
{
        unsigned int rate_len = 0;

        if (ieee->modulation & RTLLIB_CCK_MODULATION)
                rate_len = RTLLIB_CCK_RATE_LEN + 2;

        if (ieee->modulation & RTLLIB_OFDM_MODULATION)

                rate_len += RTLLIB_OFDM_RATE_LEN + 2;

        return rate_len;
}

/* place the MFIE rate, tag to the memory (double) pointed.
 * Then it updates the pointer so that
 * it points after the new MFIE tag added.
 */
static void rtllib_MFIE_Brate(struct rtllib_device *ieee, u8 **tag_p)
{
        u8 *tag = *tag_p;

        if (ieee->modulation & RTLLIB_CCK_MODULATION) {
                *tag++ = MFIE_TYPE_RATES;
                *tag++ = 4;
                *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_CCK_RATE_1MB;
                *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_CCK_RATE_2MB;
                *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_CCK_RATE_5MB;
                *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_CCK_RATE_11MB;
        }

        /* We may add an option for custom rates that specific HW
         * might support
         */
        *tag_p = tag;
}

static void rtllib_MFIE_Grate(struct rtllib_device *ieee, u8 **tag_p)
{
        u8 *tag = *tag_p;

        if (ieee->modulation & RTLLIB_OFDM_MODULATION) {
                *tag++ = MFIE_TYPE_RATES_EX;
                *tag++ = 8;
                *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_6MB;
                *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_9MB;
                *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_12MB;
                *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_18MB;
                *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_24MB;
                *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_36MB;
                *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_48MB;
                *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_54MB;
        }
        /* We may add an option for custom rates that specific HW might
         * support
         */
        *tag_p = tag;
}

static void rtllib_WMM_Info(struct rtllib_device *ieee, u8 **tag_p)
{
        u8 *tag = *tag_p;

        *tag++ = MFIE_TYPE_GENERIC;
        *tag++ = 7;
        *tag++ = 0x00;
        *tag++ = 0x50;
        *tag++ = 0xf2;
        *tag++ = 0x02;
        *tag++ = 0x00;
        *tag++ = 0x01;
        *tag++ = MAX_SP_Len;
        *tag_p = tag;
}

static void rtllib_TURBO_Info(struct rtllib_device *ieee, u8 **tag_p)
{
        u8 *tag = *tag_p;

        *tag++ = MFIE_TYPE_GENERIC;
        *tag++ = 7;
        *tag++ = 0x00;
        *tag++ = 0xe0;
        *tag++ = 0x4c;
        *tag++ = 0x01;
        *tag++ = 0x02;
        *tag++ = 0x11;
        *tag++ = 0x00;

        *tag_p = tag;
        netdev_alert(ieee->dev, "This is enable turbo mode IE process\n");
}

static void enqueue_mgmt(struct rtllib_device *ieee, struct sk_buff *skb)
{
        int nh;

        nh = (ieee->mgmt_queue_head + 1) % MGMT_QUEUE_NUM;

/* if the queue is full but we have newer frames then
 * just overwrites the oldest.
 *
 * if (nh == ieee->mgmt_queue_tail)
 *              return -1;
 */
        ieee->mgmt_queue_head = nh;
        ieee->mgmt_queue_ring[nh] = skb;

}

static void init_mgmt_queue(struct rtllib_device *ieee)
{
        ieee->mgmt_queue_tail = ieee->mgmt_queue_head = 0;
}


u8
MgntQuery_TxRateExcludeCCKRates(struct rtllib_device *ieee)
{
        u16     i;
        u8      QueryRate = 0;
        u8      BasicRate;


        for (i = 0; i < ieee->current_network.rates_len; i++) {
                BasicRate = ieee->current_network.rates[i]&0x7F;
                if (!rtllib_is_cck_rate(BasicRate)) {
                        if (QueryRate == 0) {
                                QueryRate = BasicRate;
                        } else {
                                if (BasicRate < QueryRate)
                                        QueryRate = BasicRate;
                        }
                }
        }

        if (QueryRate == 0) {
                QueryRate = 12;
                netdev_info(ieee->dev, "No BasicRate found!!\n");
        }
        return QueryRate;
}

static u8 MgntQuery_MgntFrameTxRate(struct rtllib_device *ieee)
{
        struct rt_hi_throughput *pHTInfo = ieee->pHTInfo;
        u8 rate;

        if (pHTInfo->IOTAction & HT_IOT_ACT_MGNT_USE_CCK_6M)
                rate = 0x0c;
        else
                rate = ieee->basic_rate & 0x7f;

        if (rate == 0) {
                if (ieee->mode == IEEE_A ||
                   ieee->mode == IEEE_N_5G ||
                   (ieee->mode == IEEE_N_24G && !pHTInfo->bCurSuppCCK))
                        rate = 0x0c;
                else
                        rate = 0x02;
        }

        return rate;
}

inline void softmac_mgmt_xmit(struct sk_buff *skb, struct rtllib_device *ieee)
{
        unsigned long flags;
        short single = ieee->softmac_features & IEEE_SOFTMAC_SINGLE_QUEUE;
        struct rtllib_hdr_3addr  *header =
                (struct rtllib_hdr_3addr  *) skb->data;

        struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + 8);

        spin_lock_irqsave(&ieee->lock, flags);

        /* called with 2nd param 0, no mgmt lock required */
        rtllib_sta_wakeup(ieee, 0);

        if (le16_to_cpu(header->frame_ctl) == RTLLIB_STYPE_BEACON)
                tcb_desc->queue_index = BEACON_QUEUE;
        else
                tcb_desc->queue_index = MGNT_QUEUE;

        if (ieee->disable_mgnt_queue)
                tcb_desc->queue_index = HIGH_QUEUE;

        tcb_desc->data_rate = MgntQuery_MgntFrameTxRate(ieee);
        tcb_desc->RATRIndex = 7;
        tcb_desc->bTxDisableRateFallBack = 1;
        tcb_desc->bTxUseDriverAssingedRate = 1;
        if (single) {
                if (ieee->queue_stop) {
                        enqueue_mgmt(ieee, skb);
                } else {
                        header->seq_ctl = cpu_to_le16(ieee->seq_ctrl[0]<<4);

                        if (ieee->seq_ctrl[0] == 0xFFF)
                                ieee->seq_ctrl[0] = 0;
                        else
                                ieee->seq_ctrl[0]++;

                        /* avoid watchdog triggers */
                        ieee->softmac_data_hard_start_xmit(skb, ieee->dev,
                                                           ieee->basic_rate);
                }

                spin_unlock_irqrestore(&ieee->lock, flags);
        } else {
                spin_unlock_irqrestore(&ieee->lock, flags);
                spin_lock_irqsave(&ieee->mgmt_tx_lock, flags);

                header->seq_ctl = cpu_to_le16(ieee->seq_ctrl[0] << 4);

                if (ieee->seq_ctrl[0] == 0xFFF)
                        ieee->seq_ctrl[0] = 0;
                else
                        ieee->seq_ctrl[0]++;

                /* check whether the managed packet queued greater than 5 */
                if (!ieee->check_nic_enough_desc(ieee->dev,
                                                 tcb_desc->queue_index) ||
                    skb_queue_len(&ieee->skb_waitQ[tcb_desc->queue_index]) ||
                    ieee->queue_stop) {
                        /* insert the skb packet to the management queue
                         *
                         * as for the completion function, it does not need
                         * to check it any more.
                         */
                        netdev_info(ieee->dev,
                               "%s():insert to waitqueue, queue_index:%d!\n",
                               __func__, tcb_desc->queue_index);
                        skb_queue_tail(&ieee->skb_waitQ[tcb_desc->queue_index],
                                       skb);
                } else {
                        ieee->softmac_hard_start_xmit(skb, ieee->dev);
                }
                spin_unlock_irqrestore(&ieee->mgmt_tx_lock, flags);
        }
}

static inline void
softmac_ps_mgmt_xmit(struct sk_buff *skb,
                     struct rtllib_device *ieee)
{
        short single = ieee->softmac_features & IEEE_SOFTMAC_SINGLE_QUEUE;
        struct rtllib_hdr_3addr  *header =
                (struct rtllib_hdr_3addr  *) skb->data;
        u16 fc, type, stype;
        struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + 8);

        fc = le16_to_cpu(header->frame_ctl);
        type = WLAN_FC_GET_TYPE(fc);
        stype = WLAN_FC_GET_STYPE(fc);


        if (stype != RTLLIB_STYPE_PSPOLL)
                tcb_desc->queue_index = MGNT_QUEUE;
        else
                tcb_desc->queue_index = HIGH_QUEUE;

        if (ieee->disable_mgnt_queue)
                tcb_desc->queue_index = HIGH_QUEUE;


        tcb_desc->data_rate = MgntQuery_MgntFrameTxRate(ieee);
        tcb_desc->RATRIndex = 7;
        tcb_desc->bTxDisableRateFallBack = 1;
        tcb_desc->bTxUseDriverAssingedRate = 1;
        if (single) {
                if (type != RTLLIB_FTYPE_CTL) {
                        header->seq_ctl = cpu_to_le16(ieee->seq_ctrl[0] << 4);

                        if (ieee->seq_ctrl[0] == 0xFFF)
                                ieee->seq_ctrl[0] = 0;
                        else
                                ieee->seq_ctrl[0]++;

                }
                /* avoid watchdog triggers */
                ieee->softmac_data_hard_start_xmit(skb, ieee->dev,
                                                   ieee->basic_rate);

        } else {
                if (type != RTLLIB_FTYPE_CTL) {
                        header->seq_ctl = cpu_to_le16(ieee->seq_ctrl[0] << 4);

                        if (ieee->seq_ctrl[0] == 0xFFF)
                                ieee->seq_ctrl[0] = 0;
                        else
                                ieee->seq_ctrl[0]++;
                }
                ieee->softmac_hard_start_xmit(skb, ieee->dev);

        }
}

static inline struct sk_buff *rtllib_probe_req(struct rtllib_device *ieee)
{
        unsigned int len, rate_len;
        u8 *tag;
        struct sk_buff *skb;
        struct rtllib_probe_request *req;

        len = ieee->current_network.ssid_len;

        rate_len = rtllib_MFIE_rate_len(ieee);

        skb = dev_alloc_skb(sizeof(struct rtllib_probe_request) +
                            2 + len + rate_len + ieee->tx_headroom);

        if (!skb)
                return NULL;

        skb_reserve(skb, ieee->tx_headroom);

        req = skb_put(skb, sizeof(struct rtllib_probe_request));
        req->header.frame_ctl = cpu_to_le16(RTLLIB_STYPE_PROBE_REQ);
        req->header.duration_id = 0;

        eth_broadcast_addr(req->header.addr1);
        ether_addr_copy(req->header.addr2, ieee->dev->dev_addr);
        eth_broadcast_addr(req->header.addr3);

        tag = skb_put(skb, len + 2 + rate_len);

        *tag++ = MFIE_TYPE_SSID;
        *tag++ = len;
        memcpy(tag, ieee->current_network.ssid, len);
        tag += len;

        rtllib_MFIE_Brate(ieee, &tag);
        rtllib_MFIE_Grate(ieee, &tag);

        return skb;
}

static struct sk_buff *rtllib_get_beacon_(struct rtllib_device *ieee);

static void rtllib_send_beacon(struct rtllib_device *ieee)
{
        struct sk_buff *skb;

        if (!ieee->ieee_up)
                return;
        skb = rtllib_get_beacon_(ieee);

        if (skb) {
                softmac_mgmt_xmit(skb, ieee);
                ieee->softmac_stats.tx_beacons++;
        }

        if (ieee->beacon_txing && ieee->ieee_up)
                mod_timer(&ieee->beacon_timer, jiffies +
                          (msecs_to_jiffies(ieee->current_network.beacon_interval - 5)));
}


static void rtllib_send_beacon_cb(struct timer_list *t)
{
        struct rtllib_device *ieee =
                from_timer(ieee, t, beacon_timer);
        unsigned long flags;

        spin_lock_irqsave(&ieee->beacon_lock, flags);
        rtllib_send_beacon(ieee);
        spin_unlock_irqrestore(&ieee->beacon_lock, flags);
}

/* Enables network monitor mode, all rx packets will be received. */
void rtllib_EnableNetMonitorMode(struct net_device *dev,
                bool bInitState)
{
        struct rtllib_device *ieee = netdev_priv_rsl(dev);

        netdev_info(dev, "========>Enter Monitor Mode\n");

        ieee->AllowAllDestAddrHandler(dev, true, !bInitState);
}


/* Disables network monitor mode. Only packets destinated to
 * us will be received.
 */
void rtllib_DisableNetMonitorMode(struct net_device *dev,
                bool bInitState)
{
        struct rtllib_device *ieee = netdev_priv_rsl(dev);

        netdev_info(dev, "========>Exit Monitor Mode\n");

        ieee->AllowAllDestAddrHandler(dev, false, !bInitState);
}


/* Enables the specialized promiscuous mode required by Intel.
 * In this mode, Intel intends to hear traffics from/to other STAs in the
 * same BSS. Therefore we don't have to disable checking BSSID and we only need
 * to allow all dest. BUT: if we enable checking BSSID then we can't recv
 * packets from other STA.
 */
void rtllib_EnableIntelPromiscuousMode(struct net_device *dev,
                bool bInitState)
{
        bool bFilterOutNonAssociatedBSSID = false;

        struct rtllib_device *ieee = netdev_priv_rsl(dev);

        netdev_info(dev, "========>Enter Intel Promiscuous Mode\n");

        ieee->AllowAllDestAddrHandler(dev, true, !bInitState);
        ieee->SetHwRegHandler(dev, HW_VAR_CECHK_BSSID,
                             (u8 *)&bFilterOutNonAssociatedBSSID);

        ieee->bNetPromiscuousMode = true;
}
EXPORT_SYMBOL(rtllib_EnableIntelPromiscuousMode);


/* Disables the specialized promiscuous mode required by Intel.
 * See MgntEnableIntelPromiscuousMode for detail.
 */
void rtllib_DisableIntelPromiscuousMode(struct net_device *dev,
                bool bInitState)
{
        bool bFilterOutNonAssociatedBSSID = true;

        struct rtllib_device *ieee = netdev_priv_rsl(dev);

        netdev_info(dev, "========>Exit Intel Promiscuous Mode\n");

        ieee->AllowAllDestAddrHandler(dev, false, !bInitState);
        ieee->SetHwRegHandler(dev, HW_VAR_CECHK_BSSID,
                             (u8 *)&bFilterOutNonAssociatedBSSID);

        ieee->bNetPromiscuousMode = false;
}
EXPORT_SYMBOL(rtllib_DisableIntelPromiscuousMode);

static void rtllib_send_probe(struct rtllib_device *ieee, u8 is_mesh)
{
        struct sk_buff *skb;

        skb = rtllib_probe_req(ieee);
        if (skb) {
                softmac_mgmt_xmit(skb, ieee);
                ieee->softmac_stats.tx_probe_rq++;
        }
}


static void rtllib_send_probe_requests(struct rtllib_device *ieee, u8 is_mesh)
{
        if (ieee->active_scan && (ieee->softmac_features &
            IEEE_SOFTMAC_PROBERQ)) {
                rtllib_send_probe(ieee, 0);
                rtllib_send_probe(ieee, 0);
        }
}

static void rtllib_update_active_chan_map(struct rtllib_device *ieee)
{
        memcpy(ieee->active_channel_map, GET_DOT11D_INFO(ieee)->channel_map,
               MAX_CHANNEL_NUMBER+1);
}

/* this performs syncro scan blocking the caller until all channels
 * in the allowed channel map has been checked.
 */
static void rtllib_softmac_scan_syncro(struct rtllib_device *ieee, u8 is_mesh)
{
        union iwreq_data wrqu;
        short ch = 0;

        rtllib_update_active_chan_map(ieee);

        ieee->be_scan_inprogress = true;

        mutex_lock(&ieee->scan_mutex);

        while (1) {
                do {
                        ch++;
                        if (ch > MAX_CHANNEL_NUMBER)
                                goto out; /* scan completed */
                } while (!ieee->active_channel_map[ch]);

                /* this function can be called in two situations
                 * 1- We have switched to ad-hoc mode and we are
                 *    performing a complete syncro scan before conclude
                 *    there are no interesting cell and to create a
                 *    new one. In this case the link state is
                 *    RTLLIB_NOLINK until we found an interesting cell.
                 *    If so the ieee8021_new_net, called by the RX path
                 *    will set the state to RTLLIB_LINKED, so we stop
                 *    scanning
                 * 2- We are linked and the root uses run iwlist scan.
                 *    So we switch to RTLLIB_LINKED_SCANNING to remember
                 *    that we are still logically linked (not interested in
                 *    new network events, despite for updating the net list,
                 *    but we are temporarly 'unlinked' as the driver shall
                 *    not filter RX frames and the channel is changing.
                 * So the only situation in which are interested is to check
                 * if the state become LINKED because of the #1 situation
                 */

                if (ieee->state == RTLLIB_LINKED)
                        goto out;
                if (ieee->sync_scan_hurryup) {
                        netdev_info(ieee->dev,
                                    "============>sync_scan_hurryup out\n");
                        goto out;
                }

                ieee->set_chan(ieee->dev, ch);
                if (ieee->active_channel_map[ch] == 1)
                        rtllib_send_probe_requests(ieee, 0);

                /* this prevent excessive time wait when we
                 * need to wait for a syncro scan to end..
                 */
                msleep_interruptible_rsl(RTLLIB_SOFTMAC_SCAN_TIME);
        }
out:
        ieee->actscanning = false;
        ieee->sync_scan_hurryup = 0;

        if (ieee->state >= RTLLIB_LINKED) {
                if (IS_DOT11D_ENABLE(ieee))
                        dot11d_scan_complete(ieee);
        }
        mutex_unlock(&ieee->scan_mutex);

        ieee->be_scan_inprogress = false;

        memset(&wrqu, 0, sizeof(wrqu));
        wireless_send_event(ieee->dev, SIOCGIWSCAN, &wrqu, NULL);
}

static void rtllib_softmac_scan_wq(void *data)
{
        struct rtllib_device *ieee = container_of_dwork_rsl(data,
                                     struct rtllib_device, softmac_scan_wq);
        u8 last_channel = ieee->current_network.channel;

        rtllib_update_active_chan_map(ieee);

        if (!ieee->ieee_up)
                return;
        if (rtllib_act_scanning(ieee, true))
                return;

        mutex_lock(&ieee->scan_mutex);

        if (ieee->eRFPowerState == eRfOff) {
                netdev_info(ieee->dev,
                            "======>%s():rf state is eRfOff, return\n",
                            __func__);
                goto out1;
        }

        do {
                ieee->current_network.channel =
                        (ieee->current_network.channel + 1) %
                        MAX_CHANNEL_NUMBER;
                if (ieee->scan_watch_dog++ > MAX_CHANNEL_NUMBER) {
                        if (!ieee->active_channel_map[ieee->current_network.channel])
                                ieee->current_network.channel = 6;
                        goto out; /* no good chans */
                }
        } while (!ieee->active_channel_map[ieee->current_network.channel]);

        if (ieee->scanning_continue == 0)
                goto out;

        ieee->set_chan(ieee->dev, ieee->current_network.channel);

        if (ieee->active_channel_map[ieee->current_network.channel] == 1)
                rtllib_send_probe_requests(ieee, 0);

        schedule_delayed_work(&ieee->softmac_scan_wq,
                              msecs_to_jiffies(RTLLIB_SOFTMAC_SCAN_TIME));

        mutex_unlock(&ieee->scan_mutex);
        return;

out:
        if (IS_DOT11D_ENABLE(ieee))
                dot11d_scan_complete(ieee);
        ieee->current_network.channel = last_channel;

out1:
        ieee->actscanning = false;
        ieee->scan_watch_dog = 0;
        ieee->scanning_continue = 0;
        mutex_unlock(&ieee->scan_mutex);
}



static void rtllib_beacons_start(struct rtllib_device *ieee)
{
        unsigned long flags;

        spin_lock_irqsave(&ieee->beacon_lock, flags);

        ieee->beacon_txing = 1;
        rtllib_send_beacon(ieee);

        spin_unlock_irqrestore(&ieee->beacon_lock, flags);
}

static void rtllib_beacons_stop(struct rtllib_device *ieee)
{
        unsigned long flags;

        spin_lock_irqsave(&ieee->beacon_lock, flags);

        ieee->beacon_txing = 0;
        del_timer_sync(&ieee->beacon_timer);

        spin_unlock_irqrestore(&ieee->beacon_lock, flags);

}


void rtllib_stop_send_beacons(struct rtllib_device *ieee)
{
        if (ieee->stop_send_beacons)
                ieee->stop_send_beacons(ieee->dev);
        if (ieee->softmac_features & IEEE_SOFTMAC_BEACONS)
                rtllib_beacons_stop(ieee);
}
EXPORT_SYMBOL(rtllib_stop_send_beacons);


void rtllib_start_send_beacons(struct rtllib_device *ieee)
{
        if (ieee->start_send_beacons)
                ieee->start_send_beacons(ieee->dev);
        if (ieee->softmac_features & IEEE_SOFTMAC_BEACONS)
                rtllib_beacons_start(ieee);
}
EXPORT_SYMBOL(rtllib_start_send_beacons);


static void rtllib_softmac_stop_scan(struct rtllib_device *ieee)
{
        mutex_lock(&ieee->scan_mutex);
        ieee->scan_watch_dog = 0;
        if (ieee->scanning_continue == 1) {
                ieee->scanning_continue = 0;
                ieee->actscanning = false;

                cancel_delayed_work_sync(&ieee->softmac_scan_wq);
        }

        mutex_unlock(&ieee->scan_mutex);
}

void rtllib_stop_scan(struct rtllib_device *ieee)
{
        if (ieee->softmac_features & IEEE_SOFTMAC_SCAN) {
                rtllib_softmac_stop_scan(ieee);
        } else {
                if (ieee->rtllib_stop_hw_scan)
                        ieee->rtllib_stop_hw_scan(ieee->dev);
        }
}
EXPORT_SYMBOL(rtllib_stop_scan);

void rtllib_stop_scan_syncro(struct rtllib_device *ieee)
{
        if (ieee->softmac_features & IEEE_SOFTMAC_SCAN) {
                ieee->sync_scan_hurryup = 1;
        } else {
                if (ieee->rtllib_stop_hw_scan)
                        ieee->rtllib_stop_hw_scan(ieee->dev);
        }
}
EXPORT_SYMBOL(rtllib_stop_scan_syncro);

bool rtllib_act_scanning(struct rtllib_device *ieee, bool sync_scan)
{
        if (ieee->softmac_features & IEEE_SOFTMAC_SCAN) {
                if (sync_scan)
                        return ieee->be_scan_inprogress;
                else
                        return ieee->actscanning || ieee->be_scan_inprogress;
        } else {
                return test_bit(STATUS_SCANNING, &ieee->status);
        }
}
EXPORT_SYMBOL(rtllib_act_scanning);

/* called with ieee->lock held */
static void rtllib_start_scan(struct rtllib_device *ieee)
{
        if (ieee->rtllib_ips_leave_wq != NULL)
                ieee->rtllib_ips_leave_wq(ieee->dev);

        if (IS_DOT11D_ENABLE(ieee)) {
                if (IS_COUNTRY_IE_VALID(ieee))
                        RESET_CIE_WATCHDOG(ieee);
        }
        if (ieee->softmac_features & IEEE_SOFTMAC_SCAN) {
                if (ieee->scanning_continue == 0) {
                        ieee->actscanning = true;
                        ieee->scanning_continue = 1;
                        schedule_delayed_work(&ieee->softmac_scan_wq, 0);
                }
        } else {
                if (ieee->rtllib_start_hw_scan)
                        ieee->rtllib_start_hw_scan(ieee->dev);
        }
}

/* called with wx_mutex held */
void rtllib_start_scan_syncro(struct rtllib_device *ieee, u8 is_mesh)
{
        if (IS_DOT11D_ENABLE(ieee)) {
                if (IS_COUNTRY_IE_VALID(ieee))
                        RESET_CIE_WATCHDOG(ieee);
        }
        ieee->sync_scan_hurryup = 0;
        if (ieee->softmac_features & IEEE_SOFTMAC_SCAN) {
                rtllib_softmac_scan_syncro(ieee, is_mesh);
        } else {
                if (ieee->rtllib_start_hw_scan)
                        ieee->rtllib_start_hw_scan(ieee->dev);
        }
}
EXPORT_SYMBOL(rtllib_start_scan_syncro);

static inline struct sk_buff *
rtllib_authentication_req(struct rtllib_network *beacon,
                          struct rtllib_device *ieee,
                          int challengelen, u8 *daddr)
{
        struct sk_buff *skb;
        struct rtllib_authentication *auth;
        int  len;

        len = sizeof(struct rtllib_authentication) + challengelen +
                     ieee->tx_headroom + 4;
        skb = dev_alloc_skb(len);

        if (!skb)
                return NULL;

        skb_reserve(skb, ieee->tx_headroom);

        auth = skb_put(skb, sizeof(struct rtllib_authentication));

        auth->header.frame_ctl = cpu_to_le16(RTLLIB_STYPE_AUTH);
        if (challengelen)
                auth->header.frame_ctl |= cpu_to_le16(RTLLIB_FCTL_WEP);

        auth->header.duration_id = cpu_to_le16(0x013a);
        ether_addr_copy(auth->header.addr1, beacon->bssid);
        ether_addr_copy(auth->header.addr2, ieee->dev->dev_addr);
        ether_addr_copy(auth->header.addr3, beacon->bssid);
        if (ieee->auth_mode == 0)
                auth->algorithm = WLAN_AUTH_OPEN;
        else if (ieee->auth_mode == 1)
                auth->algorithm = cpu_to_le16(WLAN_AUTH_SHARED_KEY);
        else if (ieee->auth_mode == 2)
                auth->algorithm = WLAN_AUTH_OPEN;
        auth->transaction = cpu_to_le16(ieee->associate_seq);
        ieee->associate_seq++;

        auth->status = cpu_to_le16(WLAN_STATUS_SUCCESS);

        return skb;
}

static struct sk_buff *rtllib_probe_resp(struct rtllib_device *ieee,
                                         const u8 *dest)
{
        u8 *tag;
        int beacon_size;
        struct rtllib_probe_response *beacon_buf;
        struct sk_buff *skb = NULL;
        int encrypt;
        int atim_len, erp_len;
        struct lib80211_crypt_data *crypt;

        char *ssid = ieee->current_network.ssid;
        int ssid_len = ieee->current_network.ssid_len;
        int rate_len = ieee->current_network.rates_len+2;
        int rate_ex_len = ieee->current_network.rates_ex_len;
        int wpa_ie_len = ieee->wpa_ie_len;
        u8 erpinfo_content = 0;

        u8 *tmp_ht_cap_buf = NULL;
        u8 tmp_ht_cap_len = 0;
        u8 *tmp_ht_info_buf = NULL;
        u8 tmp_ht_info_len = 0;
        struct rt_hi_throughput *pHTInfo = ieee->pHTInfo;
        u8 *tmp_generic_ie_buf = NULL;
        u8 tmp_generic_ie_len = 0;

        if (rate_ex_len > 0)
                rate_ex_len += 2;

        if (ieee->current_network.capability & WLAN_CAPABILITY_IBSS)
                atim_len = 4;
        else
                atim_len = 0;

        if ((ieee->current_network.mode == IEEE_G) ||
           (ieee->current_network.mode == IEEE_N_24G &&
           ieee->pHTInfo->bCurSuppCCK)) {
                erp_len = 3;
                erpinfo_content = 0;
                if (ieee->current_network.buseprotection)
                        erpinfo_content |= ERP_UseProtection;
        } else
                erp_len = 0;

        crypt = ieee->crypt_info.crypt[ieee->crypt_info.tx_keyidx];
        encrypt = ieee->host_encrypt && crypt && crypt->ops &&
                ((strcmp(crypt->ops->name, "R-WEP") == 0 || wpa_ie_len));
        if (ieee->pHTInfo->bCurrentHTSupport) {
                tmp_ht_cap_buf = (u8 *) &(ieee->pHTInfo->SelfHTCap);
                tmp_ht_cap_len = sizeof(ieee->pHTInfo->SelfHTCap);
                tmp_ht_info_buf = (u8 *) &(ieee->pHTInfo->SelfHTInfo);
                tmp_ht_info_len = sizeof(ieee->pHTInfo->SelfHTInfo);
                HTConstructCapabilityElement(ieee, tmp_ht_cap_buf,
                                             &tmp_ht_cap_len, encrypt, false);
                HTConstructInfoElement(ieee, tmp_ht_info_buf, &tmp_ht_info_len,
                                       encrypt);

                if (pHTInfo->bRegRT2RTAggregation) {
                        tmp_generic_ie_buf = ieee->pHTInfo->szRT2RTAggBuffer;
                        tmp_generic_ie_len =
                                 sizeof(ieee->pHTInfo->szRT2RTAggBuffer);
                        HTConstructRT2RTAggElement(ieee, tmp_generic_ie_buf,
                                                   &tmp_generic_ie_len);
                }
        }

        beacon_size = sizeof(struct rtllib_probe_response)+2+
                ssid_len + 3 + rate_len + rate_ex_len + atim_len + erp_len
                + wpa_ie_len + ieee->tx_headroom;
        skb = dev_alloc_skb(beacon_size);
        if (!skb)
                return NULL;

        skb_reserve(skb, ieee->tx_headroom);

        beacon_buf = skb_put(skb, (beacon_size - ieee->tx_headroom));
        ether_addr_copy(beacon_buf->header.addr1, dest);
        ether_addr_copy(beacon_buf->header.addr2, ieee->dev->dev_addr);
        ether_addr_copy(beacon_buf->header.addr3, ieee->current_network.bssid);

        beacon_buf->header.duration_id = 0;
        beacon_buf->beacon_interval =
                cpu_to_le16(ieee->current_network.beacon_interval);
        beacon_buf->capability =
                cpu_to_le16(ieee->current_network.capability &
                WLAN_CAPABILITY_IBSS);
        beacon_buf->capability |=
                cpu_to_le16(ieee->current_network.capability &
                WLAN_CAPABILITY_SHORT_PREAMBLE);

        if (ieee->short_slot && (ieee->current_network.capability &
            WLAN_CAPABILITY_SHORT_SLOT_TIME))
                beacon_buf->capability |=
                        cpu_to_le16(WLAN_CAPABILITY_SHORT_SLOT_TIME);

        crypt = ieee->crypt_info.crypt[ieee->crypt_info.tx_keyidx];
        if (encrypt)
                beacon_buf->capability |= cpu_to_le16(WLAN_CAPABILITY_PRIVACY);


        beacon_buf->header.frame_ctl = cpu_to_le16(RTLLIB_STYPE_PROBE_RESP);
        beacon_buf->info_element[0].id = MFIE_TYPE_SSID;
        beacon_buf->info_element[0].len = ssid_len;

        tag = (u8 *) beacon_buf->info_element[0].data;

        memcpy(tag, ssid, ssid_len);

        tag += ssid_len;

        *(tag++) = MFIE_TYPE_RATES;
        *(tag++) = rate_len-2;
        memcpy(tag, ieee->current_network.rates, rate_len-2);
        tag += rate_len-2;

        *(tag++) = MFIE_TYPE_DS_SET;
        *(tag++) = 1;
        *(tag++) = ieee->current_network.channel;

        if (atim_len) {
                u16 val16;
                *(tag++) = MFIE_TYPE_IBSS_SET;
                *(tag++) = 2;
                val16 = ieee->current_network.atim_window;
                memcpy((u8 *)tag, (u8 *)&val16, 2);
                tag += 2;
        }

        if (erp_len) {
                *(tag++) = MFIE_TYPE_ERP;
                *(tag++) = 1;
                *(tag++) = erpinfo_content;
        }
        if (rate_ex_len) {
                *(tag++) = MFIE_TYPE_RATES_EX;
                *(tag++) = rate_ex_len-2;
                memcpy(tag, ieee->current_network.rates_ex, rate_ex_len-2);
                tag += rate_ex_len-2;
        }

        if (wpa_ie_len) {
                if (ieee->iw_mode == IW_MODE_ADHOC)
                        memcpy(&ieee->wpa_ie[14], &ieee->wpa_ie[8], 4);
                memcpy(tag, ieee->wpa_ie, ieee->wpa_ie_len);
                tag += ieee->wpa_ie_len;
        }
        return skb;
}

static struct sk_buff *rtllib_assoc_resp(struct rtllib_device *ieee, u8 *dest)
{
        struct sk_buff *skb;
        u8 *tag;

        struct lib80211_crypt_data *crypt;
        struct rtllib_assoc_response_frame *assoc;
        short encrypt;

        unsigned int rate_len = rtllib_MFIE_rate_len(ieee);
        int len = sizeof(struct rtllib_assoc_response_frame) + rate_len +
                  ieee->tx_headroom;

        skb = dev_alloc_skb(len);

        if (!skb)
                return NULL;

        skb_reserve(skb, ieee->tx_headroom);

        assoc = skb_put(skb, sizeof(struct rtllib_assoc_response_frame));

        assoc->header.frame_ctl = cpu_to_le16(RTLLIB_STYPE_ASSOC_RESP);
        ether_addr_copy(assoc->header.addr1, dest);
        ether_addr_copy(assoc->header.addr3, ieee->dev->dev_addr);
        ether_addr_copy(assoc->header.addr2, ieee->dev->dev_addr);
        assoc->capability = cpu_to_le16(ieee->iw_mode == IW_MODE_MASTER ?
                WLAN_CAPABILITY_ESS : WLAN_CAPABILITY_IBSS);


        if (ieee->short_slot)
                assoc->capability |=
                                 cpu_to_le16(WLAN_CAPABILITY_SHORT_SLOT_TIME);

        if (ieee->host_encrypt)
                crypt = ieee->crypt_info.crypt[ieee->crypt_info.tx_keyidx];
        else
                crypt = NULL;

        encrypt = (crypt && crypt->ops);

        if (encrypt)
                assoc->capability |= cpu_to_le16(WLAN_CAPABILITY_PRIVACY);

        assoc->status = 0;
        assoc->aid = cpu_to_le16(ieee->assoc_id);
        if (ieee->assoc_id == 0x2007)
                ieee->assoc_id = 0;
        else
                ieee->assoc_id++;

        tag = skb_put(skb, rate_len);
        rtllib_MFIE_Brate(ieee, &tag);
        rtllib_MFIE_Grate(ieee, &tag);

        return skb;
}

static struct sk_buff *rtllib_auth_resp(struct rtllib_device *ieee, int status,
                                 u8 *dest)
{
        struct sk_buff *skb = NULL;
        struct rtllib_authentication *auth;
        int len = ieee->tx_headroom + sizeof(struct rtllib_authentication) + 1;

        skb = dev_alloc_skb(len);
        if (!skb)
                return NULL;

        skb->len = sizeof(struct rtllib_authentication);

        skb_reserve(skb, ieee->tx_headroom);

        auth = skb_put(skb, sizeof(struct rtllib_authentication));

        auth->status = cpu_to_le16(status);
        auth->transaction = cpu_to_le16(2);
        auth->algorithm = cpu_to_le16(WLAN_AUTH_OPEN);

        ether_addr_copy(auth->header.addr3, ieee->dev->dev_addr);
        ether_addr_copy(auth->header.addr2, ieee->dev->dev_addr);
        ether_addr_copy(auth->header.addr1, dest);
        auth->header.frame_ctl = cpu_to_le16(RTLLIB_STYPE_AUTH);
        return skb;


}

static struct sk_buff *rtllib_null_func(struct rtllib_device *ieee, short pwr)
{
        struct sk_buff *skb;
        struct rtllib_hdr_3addr *hdr;

        skb = dev_alloc_skb(sizeof(struct rtllib_hdr_3addr)+ieee->tx_headroom);
        if (!skb)
                return NULL;

        skb_reserve(skb, ieee->tx_headroom);

        hdr = skb_put(skb, sizeof(struct rtllib_hdr_3addr));

        ether_addr_copy(hdr->addr1, ieee->current_network.bssid);
        ether_addr_copy(hdr->addr2, ieee->dev->dev_addr);
        ether_addr_copy(hdr->addr3, ieee->current_network.bssid);

        hdr->frame_ctl = cpu_to_le16(RTLLIB_FTYPE_DATA |
                RTLLIB_STYPE_NULLFUNC | RTLLIB_FCTL_TODS |
                (pwr ? RTLLIB_FCTL_PM : 0));

        return skb;


}

static struct sk_buff *rtllib_pspoll_func(struct rtllib_device *ieee)
{
        struct sk_buff *skb;
        struct rtllib_pspoll_hdr *hdr;

        skb = dev_alloc_skb(sizeof(struct rtllib_pspoll_hdr)+ieee->tx_headroom);
        if (!skb)
                return NULL;

        skb_reserve(skb, ieee->tx_headroom);

        hdr = skb_put(skb, sizeof(struct rtllib_pspoll_hdr));

        ether_addr_copy(hdr->bssid, ieee->current_network.bssid);
        ether_addr_copy(hdr->ta, ieee->dev->dev_addr);

        hdr->aid = cpu_to_le16(ieee->assoc_id | 0xc000);
        hdr->frame_ctl = cpu_to_le16(RTLLIB_FTYPE_CTL | RTLLIB_STYPE_PSPOLL |
                         RTLLIB_FCTL_PM);

        return skb;

}

static void rtllib_resp_to_assoc_rq(struct rtllib_device *ieee, u8 *dest)
{
        struct sk_buff *buf = rtllib_assoc_resp(ieee, dest);

        if (buf)
                softmac_mgmt_xmit(buf, ieee);
}


static void rtllib_resp_to_auth(struct rtllib_device *ieee, int s, u8 *dest)
{
        struct sk_buff *buf = rtllib_auth_resp(ieee, s, dest);

        if (buf)
                softmac_mgmt_xmit(buf, ieee);
}


static void rtllib_resp_to_probe(struct rtllib_device *ieee, u8 *dest)
{
        struct sk_buff *buf = rtllib_probe_resp(ieee, dest);

        if (buf)
                softmac_mgmt_xmit(buf, ieee);
}


static inline int SecIsInPMKIDList(struct rtllib_device *ieee, u8 *bssid)
{
        int i = 0;

        do {
                if ((ieee->PMKIDList[i].bUsed) &&
                   (memcmp(ieee->PMKIDList[i].Bssid, bssid, ETH_ALEN) == 0))
                        break;
                i++;
        } while (i < NUM_PMKID_CACHE);

        if (i == NUM_PMKID_CACHE)
                i = -1;
        return i;
}

static inline struct sk_buff *
rtllib_association_req(struct rtllib_network *beacon,
                       struct rtllib_device *ieee)
{
        struct sk_buff *skb;
        struct rtllib_assoc_request_frame *hdr;
        u8 *tag, *ies;
        int i;
        u8 *ht_cap_buf = NULL;
        u8 ht_cap_len = 0;
        u8 *realtek_ie_buf = NULL;
        u8 realtek_ie_len = 0;
        int wpa_ie_len = ieee->wpa_ie_len;
        int wps_ie_len = ieee->wps_ie_len;
        unsigned int ckip_ie_len = 0;
        unsigned int ccxrm_ie_len = 0;
        unsigned int cxvernum_ie_len = 0;
        struct lib80211_crypt_data *crypt;
        int encrypt;
        int     PMKCacheIdx;

        unsigned int rate_len = (beacon->rates_len ?
                                (beacon->rates_len + 2) : 0) +
                                (beacon->rates_ex_len ? (beacon->rates_ex_len) +
                                2 : 0);

        unsigned int wmm_info_len = beacon->qos_data.supported ? 9 : 0;
        unsigned int turbo_info_len = beacon->Turbo_Enable ? 9 : 0;

        int len = 0;

        crypt = ieee->crypt_info.crypt[ieee->crypt_info.tx_keyidx];
        if (crypt != NULL)
                encrypt = ieee->host_encrypt && crypt && crypt->ops &&
                          ((strcmp(crypt->ops->name, "R-WEP") == 0 ||
                          wpa_ie_len));
        else
                encrypt = 0;

        if ((ieee->rtllib_ap_sec_type &&
            (ieee->rtllib_ap_sec_type(ieee) & SEC_ALG_TKIP)) ||
            ieee->bForcedBgMode) {
                ieee->pHTInfo->bEnableHT = 0;
                ieee->mode = WIRELESS_MODE_G;
        }

        if (ieee->pHTInfo->bCurrentHTSupport && ieee->pHTInfo->bEnableHT) {
                ht_cap_buf = (u8 *)&(ieee->pHTInfo->SelfHTCap);
                ht_cap_len = sizeof(ieee->pHTInfo->SelfHTCap);
                HTConstructCapabilityElement(ieee, ht_cap_buf, &ht_cap_len,
                                             encrypt, true);
                if (ieee->pHTInfo->bCurrentRT2RTAggregation) {
                        realtek_ie_buf = ieee->pHTInfo->szRT2RTAggBuffer;
                        realtek_ie_len =
                                 sizeof(ieee->pHTInfo->szRT2RTAggBuffer);
                        HTConstructRT2RTAggElement(ieee, realtek_ie_buf,
                                                   &realtek_ie_len);
                }
        }

        if (beacon->bCkipSupported)
                ckip_ie_len = 30+2;
        if (beacon->bCcxRmEnable)
                ccxrm_ie_len = 6+2;
        if (beacon->BssCcxVerNumber >= 2)
                cxvernum_ie_len = 5+2;

        PMKCacheIdx = SecIsInPMKIDList(ieee, ieee->current_network.bssid);
        if (PMKCacheIdx >= 0) {
                wpa_ie_len += 18;
                netdev_info(ieee->dev, "[PMK cache]: WPA2 IE length: %x\n",
                            wpa_ie_len);
        }
        len = sizeof(struct rtllib_assoc_request_frame) + 2
                + beacon->ssid_len
                + rate_len
                + wpa_ie_len
                + wps_ie_len
                + wmm_info_len
                + turbo_info_len
                + ht_cap_len
                + realtek_ie_len
                + ckip_ie_len
                + ccxrm_ie_len
                + cxvernum_ie_len
                + ieee->tx_headroom;

        skb = dev_alloc_skb(len);

        if (!skb)
                return NULL;

        skb_reserve(skb, ieee->tx_headroom);

        hdr = skb_put(skb, sizeof(struct rtllib_assoc_request_frame) + 2);


        hdr->header.frame_ctl = cpu_to_le16(RTLLIB_STYPE_ASSOC_REQ);
        hdr->header.duration_id = cpu_to_le16(37);
        ether_addr_copy(hdr->header.addr1, beacon->bssid);
        ether_addr_copy(hdr->header.addr2, ieee->dev->dev_addr);
        ether_addr_copy(hdr->header.addr3, beacon->bssid);

        ether_addr_copy(ieee->ap_mac_addr, beacon->bssid);

        hdr->capability = cpu_to_le16(WLAN_CAPABILITY_ESS);
        if (beacon->capability & WLAN_CAPABILITY_PRIVACY)
                hdr->capability |= cpu_to_le16(WLAN_CAPABILITY_PRIVACY);

        if (beacon->capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
                hdr->capability |= cpu_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE);

        if (ieee->short_slot &&
           (beacon->capability&WLAN_CAPABILITY_SHORT_SLOT_TIME))
                hdr->capability |= cpu_to_le16(WLAN_CAPABILITY_SHORT_SLOT_TIME);


        hdr->listen_interval = cpu_to_le16(beacon->listen_interval);

        hdr->info_element[0].id = MFIE_TYPE_SSID;

        hdr->info_element[0].len = beacon->ssid_len;
        skb_put_data(skb, beacon->ssid, beacon->ssid_len);

        tag = skb_put(skb, rate_len);

        if (beacon->rates_len) {
                *tag++ = MFIE_TYPE_RATES;
                *tag++ = beacon->rates_len;
                for (i = 0; i < beacon->rates_len; i++)
                        *tag++ = beacon->rates[i];
        }

        if (beacon->rates_ex_len) {
                *tag++ = MFIE_TYPE_RATES_EX;
                *tag++ = beacon->rates_ex_len;
                for (i = 0; i < beacon->rates_ex_len; i++)
                        *tag++ = beacon->rates_ex[i];
        }

        if (beacon->bCkipSupported) {
                static const u8 AironetIeOui[] = {0x00, 0x01, 0x66};
                u8      CcxAironetBuf[30];
                struct octet_string osCcxAironetIE;

                memset(CcxAironetBuf, 0, 30);
                osCcxAironetIE.Octet = CcxAironetBuf;
                osCcxAironetIE.Length = sizeof(CcxAironetBuf);
                memcpy(osCcxAironetIE.Octet, AironetIeOui,
                       sizeof(AironetIeOui));

                osCcxAironetIE.Octet[IE_CISCO_FLAG_POSITION] |=
                                         (SUPPORT_CKIP_PK|SUPPORT_CKIP_MIC);
                tag = skb_put(skb, ckip_ie_len);
                *tag++ = MFIE_TYPE_AIRONET;
                *tag++ = osCcxAironetIE.Length;
                memcpy(tag, osCcxAironetIE.Octet, osCcxAironetIE.Length);
                tag += osCcxAironetIE.Length;
        }

        if (beacon->bCcxRmEnable) {
                static const u8 CcxRmCapBuf[] = {0x00, 0x40, 0x96, 0x01, 0x01,
                        0x00};
                struct octet_string osCcxRmCap;

                osCcxRmCap.Octet = (u8 *) CcxRmCapBuf;
                osCcxRmCap.Length = sizeof(CcxRmCapBuf);
                tag = skb_put(skb, ccxrm_ie_len);
                *tag++ = MFIE_TYPE_GENERIC;
                *tag++ = osCcxRmCap.Length;
                memcpy(tag, osCcxRmCap.Octet, osCcxRmCap.Length);
                tag += osCcxRmCap.Length;
        }

        if (beacon->BssCcxVerNumber >= 2) {
                u8 CcxVerNumBuf[] = {0x00, 0x40, 0x96, 0x03, 0x00};
                struct octet_string osCcxVerNum;

                CcxVerNumBuf[4] = beacon->BssCcxVerNumber;
                osCcxVerNum.Octet = CcxVerNumBuf;
                osCcxVerNum.Length = sizeof(CcxVerNumBuf);
                tag = skb_put(skb, cxvernum_ie_len);
                *tag++ = MFIE_TYPE_GENERIC;
                *tag++ = osCcxVerNum.Length;
                memcpy(tag, osCcxVerNum.Octet, osCcxVerNum.Length);
                tag += osCcxVerNum.Length;
        }
        if (ieee->pHTInfo->bCurrentHTSupport && ieee->pHTInfo->bEnableHT) {
                if (ieee->pHTInfo->ePeerHTSpecVer != HT_SPEC_VER_EWC) {
                        tag = skb_put(skb, ht_cap_len);
                        *tag++ = MFIE_TYPE_HT_CAP;
                        *tag++ = ht_cap_len - 2;
                        memcpy(tag, ht_cap_buf, ht_cap_len - 2);
                        tag += ht_cap_len - 2;
                }
        }

        if (wpa_ie_len) {
                skb_put_data(skb, ieee->wpa_ie, ieee->wpa_ie_len);

                if (PMKCacheIdx >= 0) {
                        tag = skb_put(skb, 18);
                        *tag = 1;
                        *(tag + 1) = 0;
                        memcpy((tag + 2), &ieee->PMKIDList[PMKCacheIdx].PMKID,
                               16);
                }
        }
        if (wmm_info_len) {
                tag = skb_put(skb, wmm_info_len);
                rtllib_WMM_Info(ieee, &tag);
        }

        if (wps_ie_len && ieee->wps_ie)
                skb_put_data(skb, ieee->wps_ie, wps_ie_len);

        if (turbo_info_len) {
                tag = skb_put(skb, turbo_info_len);
                rtllib_TURBO_Info(ieee, &tag);
        }

        if (ieee->pHTInfo->bCurrentHTSupport && ieee->pHTInfo->bEnableHT) {
                if (ieee->pHTInfo->ePeerHTSpecVer == HT_SPEC_VER_EWC) {
                        tag = skb_put(skb, ht_cap_len);
                        *tag++ = MFIE_TYPE_GENERIC;
                        *tag++ = ht_cap_len - 2;
                        memcpy(tag, ht_cap_buf, ht_cap_len - 2);
                        tag += ht_cap_len - 2;
                }

                if (ieee->pHTInfo->bCurrentRT2RTAggregation) {
                        tag = skb_put(skb, realtek_ie_len);
                        *tag++ = MFIE_TYPE_GENERIC;
                        *tag++ = realtek_ie_len - 2;
                        memcpy(tag, realtek_ie_buf, realtek_ie_len - 2);
                }
        }

        kfree(ieee->assocreq_ies);
        ieee->assocreq_ies = NULL;
        ies = &(hdr->info_element[0].id);
        ieee->assocreq_ies_len = (skb->data + skb->len) - ies;
        ieee->assocreq_ies = kmemdup(ies, ieee->assocreq_ies_len, GFP_ATOMIC);
        if (!ieee->assocreq_ies)
                ieee->assocreq_ies_len = 0;

        return skb;
}

static void rtllib_associate_abort(struct rtllib_device *ieee)
{
        unsigned long flags;

        spin_lock_irqsave(&ieee->lock, flags);

        ieee->associate_seq++;

        /* don't scan, and avoid to have the RX path possibily
         * try again to associate. Even do not react to AUTH or
         * ASSOC response. Just wait for the retry wq to be scheduled.
         * Here we will check if there are good nets to associate
         * with, so we retry or just get back to NO_LINK and scanning
         */
        if (ieee->state == RTLLIB_ASSOCIATING_AUTHENTICATING) {
                netdev_dbg(ieee->dev, "Authentication failed\n");
                ieee->softmac_stats.no_auth_rs++;
        } else {
                netdev_dbg(ieee->dev, "Association failed\n");
                ieee->softmac_stats.no_ass_rs++;
        }

        ieee->state = RTLLIB_ASSOCIATING_RETRY;

        schedule_delayed_work(&ieee->associate_retry_wq,
                              RTLLIB_SOFTMAC_ASSOC_RETRY_TIME);

        spin_unlock_irqrestore(&ieee->lock, flags);
}

static void rtllib_associate_abort_cb(struct timer_list *t)
{
        struct rtllib_device *dev = from_timer(dev, t, associate_timer);

        rtllib_associate_abort(dev);
}

static void rtllib_associate_step1(struct rtllib_device *ieee, u8 *daddr)
{
        struct rtllib_network *beacon = &ieee->current_network;
        struct sk_buff *skb;

        netdev_dbg(ieee->dev, "Stopping scan\n");

        ieee->softmac_stats.tx_auth_rq++;

        skb = rtllib_authentication_req(beacon, ieee, 0, daddr);

        if (!skb)
                rtllib_associate_abort(ieee);
        else {
                ieee->state = RTLLIB_ASSOCIATING_AUTHENTICATING;
                netdev_dbg(ieee->dev, "Sending authentication request\n");
                softmac_mgmt_xmit(skb, ieee);
                if (!timer_pending(&ieee->associate_timer)) {
                        ieee->associate_timer.expires = jiffies + (HZ / 2);
                        add_timer(&ieee->associate_timer);
                }
        }
}

static void rtllib_auth_challenge(struct rtllib_device *ieee, u8 *challenge,
                                  int chlen)
{
        u8 *c;
        struct sk_buff *skb;
        struct rtllib_network *beacon = &ieee->current_network;

        ieee->associate_seq++;
        ieee->softmac_stats.tx_auth_rq++;

        skb = rtllib_authentication_req(beacon, ieee, chlen + 2, beacon->bssid);

        if (!skb)
                rtllib_associate_abort(ieee);
        else {
                c = skb_put(skb, chlen+2);
                *(c++) = MFIE_TYPE_CHALLENGE;
                *(c++) = chlen;
                memcpy(c, challenge, chlen);

                netdev_dbg(ieee->dev,
                           "Sending authentication challenge response\n");

                rtllib_encrypt_fragment(ieee, skb,
                                        sizeof(struct rtllib_hdr_3addr));

                softmac_mgmt_xmit(skb, ieee);
                mod_timer(&ieee->associate_timer, jiffies + (HZ/2));
        }
        kfree(challenge);
}

static void rtllib_associate_step2(struct rtllib_device *ieee)
{
        struct sk_buff *skb;
        struct rtllib_network *beacon = &ieee->current_network;

        del_timer_sync(&ieee->associate_timer);

        netdev_dbg(ieee->dev, "Sending association request\n");

        ieee->softmac_stats.tx_ass_rq++;
        skb = rtllib_association_req(beacon, ieee);
        if (!skb)
                rtllib_associate_abort(ieee);
        else {
                softmac_mgmt_xmit(skb, ieee);
                mod_timer(&ieee->associate_timer, jiffies + (HZ/2));
        }
}

static void rtllib_associate_complete_wq(void *data)
{
        struct rtllib_device *ieee = (struct rtllib_device *)
                                     container_of_work_rsl(data,
                                     struct rtllib_device,
                                     associate_complete_wq);
        struct rt_pwr_save_ctrl *pPSC = &(ieee->PowerSaveControl);

        netdev_info(ieee->dev, "Associated successfully with %pM\n",
                    ieee->current_network.bssid);
        if (!ieee->is_silent_reset) {
                netdev_info(ieee->dev, "normal associate\n");
                notify_wx_assoc_event(ieee);
        }

        netif_carrier_on(ieee->dev);
        ieee->is_roaming = false;
        if (rtllib_is_54g(&ieee->current_network) &&
           (ieee->modulation & RTLLIB_OFDM_MODULATION)) {
                ieee->rate = 108;
                netdev_info(ieee->dev, "Using G rates:%d\n", ieee->rate);
        } else {
                ieee->rate = 22;
                ieee->SetWirelessMode(ieee->dev, IEEE_B);
                netdev_info(ieee->dev, "Using B rates:%d\n", ieee->rate);
        }
        if (ieee->pHTInfo->bCurrentHTSupport && ieee->pHTInfo->bEnableHT) {
                netdev_info(ieee->dev, "Successfully associated, ht enabled\n");
                HTOnAssocRsp(ieee);
        } else {
                netdev_info(ieee->dev,
                            "Successfully associated, ht not enabled(%d, %d)\n",
                            ieee->pHTInfo->bCurrentHTSupport,
                            ieee->pHTInfo->bEnableHT);
                memset(ieee->dot11HTOperationalRateSet, 0, 16);
        }
        ieee->LinkDetectInfo.SlotNum = 2 * (1 +
                                       ieee->current_network.beacon_interval /
                                       500);
        if (ieee->LinkDetectInfo.NumRecvBcnInPeriod == 0 ||
            ieee->LinkDetectInfo.NumRecvDataInPeriod == 0) {
                ieee->LinkDetectInfo.NumRecvBcnInPeriod = 1;
                ieee->LinkDetectInfo.NumRecvDataInPeriod = 1;
        }
        pPSC->LpsIdleCount = 0;
        ieee->link_change(ieee->dev);

        if (ieee->is_silent_reset) {
                netdev_info(ieee->dev, "silent reset associate\n");
                ieee->is_silent_reset = false;
        }

        if (ieee->data_hard_resume)
                ieee->data_hard_resume(ieee->dev);

}

static void rtllib_sta_send_associnfo(struct rtllib_device *ieee)
{
}

static void rtllib_associate_complete(struct rtllib_device *ieee)
{
        del_timer_sync(&ieee->associate_timer);

        ieee->state = RTLLIB_LINKED;
        rtllib_sta_send_associnfo(ieee);

        schedule_work(&ieee->associate_complete_wq);
}

static void rtllib_associate_procedure_wq(void *data)
{
        struct rtllib_device *ieee = container_of_dwork_rsl(data,
                                     struct rtllib_device,
                                     associate_procedure_wq);
        rtllib_stop_scan_syncro(ieee);
        if (ieee->rtllib_ips_leave != NULL)
                ieee->rtllib_ips_leave(ieee->dev);
        mutex_lock(&ieee->wx_mutex);

        if (ieee->data_hard_stop)
                ieee->data_hard_stop(ieee->dev);

        rtllib_stop_scan(ieee);
        RT_TRACE(COMP_DBG, "===>%s(), chan:%d\n", __func__,
                 ieee->current_network.channel);
        HTSetConnectBwMode(ieee, HT_CHANNEL_WIDTH_20, HT_EXTCHNL_OFFSET_NO_EXT);
        if (ieee->eRFPowerState == eRfOff) {
                RT_TRACE(COMP_DBG,
                         "=============>%s():Rf state is eRfOff, schedule ipsleave wq again,return\n",
                         __func__);
                if (ieee->rtllib_ips_leave_wq != NULL)
                        ieee->rtllib_ips_leave_wq(ieee->dev);
                mutex_unlock(&ieee->wx_mutex);
                return;
        }
        ieee->associate_seq = 1;

        rtllib_associate_step1(ieee, ieee->current_network.bssid);

        mutex_unlock(&ieee->wx_mutex);
}

inline void rtllib_softmac_new_net(struct rtllib_device *ieee,
                                   struct rtllib_network *net)
{
        u8 tmp_ssid[IW_ESSID_MAX_SIZE + 1];
        int tmp_ssid_len = 0;

        short apset, ssidset, ssidbroad, apmatch, ssidmatch;

        /* we are interested in new new only if we are not associated
         * and we are not associating / authenticating
         */
        if (ieee->state != RTLLIB_NOLINK)
                return;

        if ((ieee->iw_mode == IW_MODE_INFRA) && !(net->capability &
            WLAN_CAPABILITY_ESS))
                return;

        if ((ieee->iw_mode == IW_MODE_ADHOC) && !(net->capability &
             WLAN_CAPABILITY_IBSS))
                return;

        if ((ieee->iw_mode == IW_MODE_ADHOC) &&
            (net->channel > ieee->ibss_maxjoin_chal))
                return;
        if (ieee->iw_mode == IW_MODE_INFRA || ieee->iw_mode == IW_MODE_ADHOC) {
                /* if the user specified the AP MAC, we need also the essid
                 * This could be obtained by beacons or, if the network does not
                 * broadcast it, it can be put manually.
                 */
                apset = ieee->wap_set;
                ssidset = ieee->ssid_set;
                ssidbroad =  !(net->ssid_len == 0 || net->ssid[0] == '\0');
                apmatch = (memcmp(ieee->current_network.bssid, net->bssid,
                                  ETH_ALEN) == 0);
                if (!ssidbroad) {
                        ssidmatch = (ieee->current_network.ssid_len ==
                                    net->hidden_ssid_len) &&
                                    (!strncmp(ieee->current_network.ssid,
                                    net->hidden_ssid, net->hidden_ssid_len));
                        if (net->hidden_ssid_len > 0) {
                                strncpy(net->ssid, net->hidden_ssid,
                                        net->hidden_ssid_len);
                                net->ssid_len = net->hidden_ssid_len;
                                ssidbroad = 1;
                        }
                } else
                        ssidmatch =
                           (ieee->current_network.ssid_len == net->ssid_len) &&
                           (!strncmp(ieee->current_network.ssid, net->ssid,
                           net->ssid_len));

                /* if the user set the AP check if match.
                 * if the network does not broadcast essid we check the
                 *       user supplied ANY essid
                 * if the network does broadcast and the user does not set
                 *       essid it is OK
                 * if the network does broadcast and the user did set essid
                 * check if essid match
                 * if the ap is not set, check that the user set the bssid
                 * and the network does broadcast and that those two bssid match
                 */
                if ((apset && apmatch &&
                   ((ssidset && ssidbroad && ssidmatch) ||
                   (ssidbroad && !ssidset) || (!ssidbroad && ssidset))) ||
                   (!apset && ssidset && ssidbroad && ssidmatch) ||
                   (ieee->is_roaming && ssidset && ssidbroad && ssidmatch)) {
                        /* Save the essid so that if it is hidden, it is
                         * replaced with the essid provided by the user.
                         */
                        if (!ssidbroad) {
                                memcpy(tmp_ssid, ieee->current_network.ssid,
                                       ieee->current_network.ssid_len);
                                tmp_ssid_len = ieee->current_network.ssid_len;
                        }
                        memcpy(&ieee->current_network, net,
                                sizeof(ieee->current_network));
                        if (!ssidbroad) {
                                memcpy(ieee->current_network.ssid, tmp_ssid,
                                       tmp_ssid_len);
                                ieee->current_network.ssid_len = tmp_ssid_len;
                        }
                        netdev_info(ieee->dev,
                                    "Linking with %s,channel:%d, qos:%d, myHT:%d, networkHT:%d, mode:%x cur_net.flags:0x%x\n",
                                    ieee->current_network.ssid,
                                    ieee->current_network.channel,
                                    ieee->current_network.qos_data.supported,
                                    ieee->pHTInfo->bEnableHT,
                                    ieee->current_network.bssht.bd_support_ht,
                                    ieee->current_network.mode,
                                    ieee->current_network.flags);

                        if ((rtllib_act_scanning(ieee, false)) &&
                           !(ieee->softmac_features & IEEE_SOFTMAC_SCAN))
                                rtllib_stop_scan_syncro(ieee);

                        HTResetIOTSetting(ieee->pHTInfo);
                        ieee->wmm_acm = 0;
                        if (ieee->iw_mode == IW_MODE_INFRA) {
                                /* Join the network for the first time */
                                ieee->AsocRetryCount = 0;
                                if ((ieee->current_network.qos_data.supported == 1) &&
                                    ieee->current_network.bssht.bd_support_ht)
                                        HTResetSelfAndSavePeerSetting(ieee,
                                                 &(ieee->current_network));
                                else
                                        ieee->pHTInfo->bCurrentHTSupport =
                                                                 false;

                                ieee->state = RTLLIB_ASSOCIATING;
                                if (ieee->LedControlHandler != NULL)
                                        ieee->LedControlHandler(ieee->dev,
                                                         LED_CTL_START_TO_LINK);
                                schedule_delayed_work(
                                           &ieee->associate_procedure_wq, 0);
                        } else {
                                if (rtllib_is_54g(&ieee->current_network) &&
                                    (ieee->modulation &
                                     RTLLIB_OFDM_MODULATION)) {
                                        ieee->rate = 108;
                                        ieee->SetWirelessMode(ieee->dev,
                                                              IEEE_G);
                                        netdev_info(ieee->dev,
                                                    "Using G rates\n");
                                } else {
                                        ieee->rate = 22;
                                        ieee->SetWirelessMode(ieee->dev,
                                                              IEEE_B);
                                        netdev_info(ieee->dev,
                                                    "Using B rates\n");
                                }
                                memset(ieee->dot11HTOperationalRateSet, 0, 16);
                                ieee->state = RTLLIB_LINKED;
                        }
                }
        }
}

static void rtllib_softmac_check_all_nets(struct rtllib_device *ieee)
{
        unsigned long flags;
        struct rtllib_network *target;

        spin_lock_irqsave(&ieee->lock, flags);

        list_for_each_entry(target, &ieee->network_list, list) {

                /* if the state become different that NOLINK means
                 * we had found what we are searching for
                 */

                if (ieee->state != RTLLIB_NOLINK)
                        break;

                if (ieee->scan_age == 0 || time_after(target->last_scanned +
                    ieee->scan_age, jiffies))
                        rtllib_softmac_new_net(ieee, target);
        }
        spin_unlock_irqrestore(&ieee->lock, flags);
}

static inline u16 auth_parse(struct net_device *dev, struct sk_buff *skb,
                             u8 **challenge, int *chlen)
{
        struct rtllib_authentication *a;
        u8 *t;

        if (skb->len <  (sizeof(struct rtllib_authentication) -
            sizeof(struct rtllib_info_element))) {
                netdev_dbg(dev, "invalid len in auth resp: %d\n", skb->len);
                return 0xcafe;
        }
        *challenge = NULL;
        a = (struct rtllib_authentication *) skb->data;
        if (skb->len > (sizeof(struct rtllib_authentication) + 3)) {
                t = skb->data + sizeof(struct rtllib_authentication);

                if (*(t++) == MFIE_TYPE_CHALLENGE) {
                        *chlen = *(t++);
                        *challenge = kmemdup(t, *chlen, GFP_ATOMIC);
                        if (!*challenge)
                                return -ENOMEM;
                }
        }
        return le16_to_cpu(a->status);
}

static int auth_rq_parse(struct net_device *dev, struct sk_buff *skb, u8 *dest)
{
        struct rtllib_authentication *a;

        if (skb->len <  (sizeof(struct rtllib_authentication) -
            sizeof(struct rtllib_info_element))) {
                netdev_dbg(dev, "invalid len in auth request: %d\n", skb->len);
                return -1;
        }
        a = (struct rtllib_authentication *) skb->data;

        ether_addr_copy(dest, a->header.addr2);

        if (le16_to_cpu(a->algorithm) != WLAN_AUTH_OPEN)
                return  WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;

        return WLAN_STATUS_SUCCESS;
}

static short probe_rq_parse(struct rtllib_device *ieee, struct sk_buff *skb,
                            u8 *src)
{
        u8 *tag;
        u8 *skbend;
        u8 *ssid = NULL;
        u8 ssidlen = 0;
        struct rtllib_hdr_3addr   *header =
                (struct rtllib_hdr_3addr   *) skb->data;
        bool bssid_match;

        if (skb->len < sizeof(struct rtllib_hdr_3addr))
                return -1; /* corrupted */

        bssid_match =
          (!ether_addr_equal(header->addr3, ieee->current_network.bssid)) &&
          (!is_broadcast_ether_addr(header->addr3));
        if (bssid_match)
                return -1;

        ether_addr_copy(src, header->addr2);

        skbend = (u8 *)skb->data + skb->len;

        tag = skb->data + sizeof(struct rtllib_hdr_3addr);

        while (tag + 1 < skbend) {
                if (*tag == 0) {
                        ssid = tag + 2;
                        ssidlen = *(tag + 1);
                        break;
                }
                tag++; /* point to the len field */
                tag = tag + *(tag); /* point to the last data byte of the tag */
                tag++; /* point to the next tag */
        }

        if (ssidlen == 0)
                return 1;

        if (!ssid)
                return 1; /* ssid not found in tagged param */

        return !strncmp(ssid, ieee->current_network.ssid, ssidlen);
}

static int assoc_rq_parse(struct net_device *dev, struct sk_buff *skb, u8 *dest)
{
        struct rtllib_assoc_request_frame *a;

        if (skb->len < (sizeof(struct rtllib_assoc_request_frame) -
                sizeof(struct rtllib_info_element))) {
                netdev_dbg(dev, "invalid len in auth request:%d\n", skb->len);
                return -1;
        }

        a = (struct rtllib_assoc_request_frame *) skb->data;

        ether_addr_copy(dest, a->header.addr2);

        return 0;
}

static inline u16 assoc_parse(struct rtllib_device *ieee, struct sk_buff *skb,
                              int *aid)
{
        struct rtllib_assoc_response_frame *response_head;
        u16 status_code;

        if (skb->len <  sizeof(struct rtllib_assoc_response_frame)) {
                netdev_dbg(ieee->dev, "Invalid len in auth resp: %d\n",
                           skb->len);
                return 0xcafe;
        }

        response_head = (struct rtllib_assoc_response_frame *) skb->data;
        *aid = le16_to_cpu(response_head->aid) & 0x3fff;

        status_code = le16_to_cpu(response_head->status);
        if ((status_code == WLAN_STATUS_ASSOC_DENIED_RATES ||
           status_code == WLAN_STATUS_CAPS_UNSUPPORTED) &&
           ((ieee->mode == IEEE_G) &&
           (ieee->current_network.mode == IEEE_N_24G) &&
           (ieee->AsocRetryCount++ < (RT_ASOC_RETRY_LIMIT-1)))) {
                ieee->pHTInfo->IOTAction |= HT_IOT_ACT_PURE_N_MODE;
        } else {
                ieee->AsocRetryCount = 0;
        }

        return le16_to_cpu(response_head->status);
}

void rtllib_rx_probe_rq(struct rtllib_device *ieee, struct sk_buff *skb)
{
        u8 dest[ETH_ALEN];

        ieee->softmac_stats.rx_probe_rq++;
        if (probe_rq_parse(ieee, skb, dest) > 0) {
                ieee->softmac_stats.tx_probe_rs++;
                rtllib_resp_to_probe(ieee, dest);
        }
}

static inline void rtllib_rx_auth_rq(struct rtllib_device *ieee,
                                     struct sk_buff *skb)
{
        u8 dest[ETH_ALEN];
        int status;

        ieee->softmac_stats.rx_auth_rq++;

        status = auth_rq_parse(ieee->dev, skb, dest);
        if (status != -1)
                rtllib_resp_to_auth(ieee, status, dest);
}

static inline void rtllib_rx_assoc_rq(struct rtllib_device *ieee,
                                      struct sk_buff *skb)
{
        u8 dest[ETH_ALEN];


        ieee->softmac_stats.rx_ass_rq++;
        if (assoc_rq_parse(ieee->dev, skb, dest) != -1)
                rtllib_resp_to_assoc_rq(ieee, dest);

        netdev_info(ieee->dev, "New client associated: %pM\n", dest);
}

void rtllib_sta_ps_send_null_frame(struct rtllib_device *ieee, short pwr)
{

        struct sk_buff *buf = rtllib_null_func(ieee, pwr);

        if (buf)
                softmac_ps_mgmt_xmit(buf, ieee);
}
EXPORT_SYMBOL(rtllib_sta_ps_send_null_frame);

void rtllib_sta_ps_send_pspoll_frame(struct rtllib_device *ieee)
{
        struct sk_buff *buf = rtllib_pspoll_func(ieee);

        if (buf)
                softmac_ps_mgmt_xmit(buf, ieee);
}

static short rtllib_sta_ps_sleep(struct rtllib_device *ieee, u64 *time)
{
        int timeout;
        u8 dtim;
        struct rt_pwr_save_ctrl *pPSC = &(ieee->PowerSaveControl);

        if (ieee->LPSDelayCnt) {
                ieee->LPSDelayCnt--;
                return 0;
        }

        dtim = ieee->current_network.dtim_data;
        if (!(dtim & RTLLIB_DTIM_VALID))
                return 0;
        timeout = ieee->current_network.beacon_interval;
        ieee->current_network.dtim_data = RTLLIB_DTIM_INVALID;
        /* there's no need to nofity AP that I find you buffered
         * with broadcast packet
         */
        if (dtim & (RTLLIB_DTIM_UCAST & ieee->ps))
                return 2;

        if (!time_after(jiffies,
                        dev_trans_start(ieee->dev) + msecs_to_jiffies(timeout)))
                return 0;
        if (!time_after(jiffies,
                        ieee->last_rx_ps_time + msecs_to_jiffies(timeout)))
                return 0;
        if ((ieee->softmac_features & IEEE_SOFTMAC_SINGLE_QUEUE) &&
            (ieee->mgmt_queue_tail != ieee->mgmt_queue_head))
                return 0;

        if (time) {
                if (ieee->bAwakePktSent) {
                        pPSC->LPSAwakeIntvl = 1;
                } else {
                        u8 MaxPeriod = 1;

                        if (pPSC->LPSAwakeIntvl == 0)
                                pPSC->LPSAwakeIntvl = 1;
                        if (pPSC->RegMaxLPSAwakeIntvl == 0)
                                MaxPeriod = 1;

                        else if (pPSC->RegMaxLPSAwakeIntvl == 0xFF)
                                MaxPeriod = ieee->current_network.dtim_period;
                        else
                                MaxPeriod = pPSC->RegMaxLPSAwakeIntvl;
                        pPSC->LPSAwakeIntvl = (pPSC->LPSAwakeIntvl >=
                                               MaxPeriod) ? MaxPeriod :
                                               (pPSC->LPSAwakeIntvl + 1);
                }
                {
                        u8 LPSAwakeIntvl_tmp = 0;
                        u8 period = ieee->current_network.dtim_period;
                        u8 count = ieee->current_network.tim.tim_count;

                        if (count == 0) {
                                if (pPSC->LPSAwakeIntvl > period)
                                        LPSAwakeIntvl_tmp = period +
                                                 (pPSC->LPSAwakeIntvl -
                                                 period) -
                                                 ((pPSC->LPSAwakeIntvl-period) %
                                                 period);
                                else
                                        LPSAwakeIntvl_tmp = pPSC->LPSAwakeIntvl;

                        } else {
                                if (pPSC->LPSAwakeIntvl >
                                    ieee->current_network.tim.tim_count)
                                        LPSAwakeIntvl_tmp = count +
                                        (pPSC->LPSAwakeIntvl - count) -
                                        ((pPSC->LPSAwakeIntvl-count)%period);
                                else
                                        LPSAwakeIntvl_tmp = pPSC->LPSAwakeIntvl;
                        }

                *time = ieee->current_network.last_dtim_sta_time
                        + msecs_to_jiffies(ieee->current_network.beacon_interval *
                        LPSAwakeIntvl_tmp);
        }
        }

        return 1;


}

static inline void rtllib_sta_ps(struct tasklet_struct *t)
{
        struct rtllib_device *ieee = from_tasklet(ieee, t, ps_task);
        u64 time;
        short sleep;
        unsigned long flags, flags2;

        spin_lock_irqsave(&ieee->lock, flags);

        if ((ieee->ps == RTLLIB_PS_DISABLED ||
             ieee->iw_mode != IW_MODE_INFRA ||
             ieee->state != RTLLIB_LINKED)) {
                RT_TRACE(COMP_DBG,
                         "=====>%s(): no need to ps,wake up!! ieee->ps is %d, ieee->iw_mode is %d, ieee->state is %d\n",
                         __func__, ieee->ps, ieee->iw_mode, ieee->state);
                spin_lock_irqsave(&ieee->mgmt_tx_lock, flags2);
                rtllib_sta_wakeup(ieee, 1);

                spin_unlock_irqrestore(&ieee->mgmt_tx_lock, flags2);
        }
        sleep = rtllib_sta_ps_sleep(ieee, &time);
        /* 2 wake, 1 sleep, 0 do nothing */
        if (sleep == 0)
                goto out;
        if (sleep == 1) {
                if (ieee->sta_sleep == LPS_IS_SLEEP) {
                        ieee->enter_sleep_state(ieee->dev, time);
                } else if (ieee->sta_sleep == LPS_IS_WAKE) {
                        spin_lock_irqsave(&ieee->mgmt_tx_lock, flags2);

                        if (ieee->ps_is_queue_empty(ieee->dev)) {
                                ieee->sta_sleep = LPS_WAIT_NULL_DATA_SEND;
                                ieee->ack_tx_to_ieee = 1;
                                rtllib_sta_ps_send_null_frame(ieee, 1);
                                ieee->ps_time = time;
                        }
                        spin_unlock_irqrestore(&ieee->mgmt_tx_lock, flags2);

                }

                ieee->bAwakePktSent = false;

        } else if (sleep == 2) {
                spin_lock_irqsave(&ieee->mgmt_tx_lock, flags2);

                rtllib_sta_wakeup(ieee, 1);

                spin_unlock_irqrestore(&ieee->mgmt_tx_lock, flags2);
        }

out:
        spin_unlock_irqrestore(&ieee->lock, flags);

}

static void rtllib_sta_wakeup(struct rtllib_device *ieee, short nl)
{
        if (ieee->sta_sleep == LPS_IS_WAKE) {
                if (nl) {
                        if (ieee->pHTInfo->IOTAction &
                            HT_IOT_ACT_NULL_DATA_POWER_SAVING) {
                                ieee->ack_tx_to_ieee = 1;
                                rtllib_sta_ps_send_null_frame(ieee, 0);
                        } else {
                                ieee->ack_tx_to_ieee = 1;
                                rtllib_sta_ps_send_pspoll_frame(ieee);
                        }
                }
                return;

        }

        if (ieee->sta_sleep == LPS_IS_SLEEP)
                ieee->sta_wake_up(ieee->dev);
        if (nl) {
                if (ieee->pHTInfo->IOTAction &
                    HT_IOT_ACT_NULL_DATA_POWER_SAVING) {
                        ieee->ack_tx_to_ieee = 1;
                        rtllib_sta_ps_send_null_frame(ieee, 0);
                } else {
                        ieee->ack_tx_to_ieee = 1;
                        ieee->polling = true;
                        rtllib_sta_ps_send_pspoll_frame(ieee);
                }

        } else {
                ieee->sta_sleep = LPS_IS_WAKE;
                ieee->polling = false;
        }
}

void rtllib_ps_tx_ack(struct rtllib_device *ieee, short success)
{
        unsigned long flags, flags2;

        spin_lock_irqsave(&ieee->lock, flags);

        if (ieee->sta_sleep == LPS_WAIT_NULL_DATA_SEND) {
                /* Null frame with PS bit set */
                if (success) {
                        ieee->sta_sleep = LPS_IS_SLEEP;
                        ieee->enter_sleep_state(ieee->dev, ieee->ps_time);
                }
                /* if the card report not success we can't be sure the AP
                 * has not RXed so we can't assume the AP believe us awake
                 */
        } else {/* 21112005 - tx again null without PS bit if lost */

                if ((ieee->sta_sleep == LPS_IS_WAKE) && !success) {
                        spin_lock_irqsave(&ieee->mgmt_tx_lock, flags2);
                        if (ieee->pHTInfo->IOTAction &
                            HT_IOT_ACT_NULL_DATA_POWER_SAVING)
                                rtllib_sta_ps_send_null_frame(ieee, 0);
                        else
                                rtllib_sta_ps_send_pspoll_frame(ieee);
                        spin_unlock_irqrestore(&ieee->mgmt_tx_lock, flags2);
                }
        }
        spin_unlock_irqrestore(&ieee->lock, flags);
}
EXPORT_SYMBOL(rtllib_ps_tx_ack);

static void rtllib_process_action(struct rtllib_device *ieee,
                                  struct sk_buff *skb)
{
        struct rtllib_hdr_3addr *header = (struct rtllib_hdr_3addr *) skb->data;
        u8 *act = rtllib_get_payload((struct rtllib_hdr *)header);
        u8 category = 0;

        if (act == NULL) {
                netdev_warn(ieee->dev,
                            "Error getting payload of action frame\n");
                return;
        }

        category = *act;
        act++;
        switch (category) {
        case ACT_CAT_BA:
                switch (*act) {
                case ACT_ADDBAREQ:
                        rtllib_rx_ADDBAReq(ieee, skb);
                        break;
                case ACT_ADDBARSP:
                        rtllib_rx_ADDBARsp(ieee, skb);
                        break;
                case ACT_DELBA:
                        rtllib_rx_DELBA(ieee, skb);
                        break;
                }
                break;
        default:
                break;
        }
}

static inline int
rtllib_rx_assoc_resp(struct rtllib_device *ieee, struct sk_buff *skb,
                     struct rtllib_rx_stats *rx_stats)
{
        u16 errcode;
        int aid;
        u8 *ies;
        struct rtllib_assoc_response_frame *assoc_resp;
        struct rtllib_hdr_3addr *header = (struct rtllib_hdr_3addr *) skb->data;
        u16 frame_ctl = le16_to_cpu(header->frame_ctl);

        netdev_dbg(ieee->dev, "received [RE]ASSOCIATION RESPONSE (%d)\n",
                   WLAN_FC_GET_STYPE(frame_ctl));

        if ((ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE) &&
             ieee->state == RTLLIB_ASSOCIATING_AUTHENTICATED &&
             (ieee->iw_mode == IW_MODE_INFRA)) {
                errcode = assoc_parse(ieee, skb, &aid);
                if (!errcode) {
                        struct rtllib_network *network =
                                 kzalloc(sizeof(struct rtllib_network),
                                 GFP_ATOMIC);

                        if (!network)
                                return 1;
                        ieee->state = RTLLIB_LINKED;
                        ieee->assoc_id = aid;
                        ieee->softmac_stats.rx_ass_ok++;
                        /* station support qos */
                        /* Let the register setting default with Legacy station */
                        assoc_resp = (struct rtllib_assoc_response_frame *)skb->data;
                        if (ieee->current_network.qos_data.supported == 1) {
                                if (rtllib_parse_info_param(ieee, assoc_resp->info_element,
                                                        rx_stats->len - sizeof(*assoc_resp),
                                                        network, rx_stats)) {
                                        kfree(network);
                                        return 1;
                                }
                                memcpy(ieee->pHTInfo->PeerHTCapBuf,
                                       network->bssht.bd_ht_cap_buf,
                                       network->bssht.bd_ht_cap_len);
                                memcpy(ieee->pHTInfo->PeerHTInfoBuf,
                                       network->bssht.bd_ht_info_buf,
                                       network->bssht.bd_ht_info_len);
                                if (ieee->handle_assoc_response != NULL)
                                        ieee->handle_assoc_response(ieee->dev,
                                                 (struct rtllib_assoc_response_frame *)header,
                                                 network);
                        }
                        kfree(network);

                        kfree(ieee->assocresp_ies);
                        ieee->assocresp_ies = NULL;
                        ies = &(assoc_resp->info_element[0].id);
                        ieee->assocresp_ies_len = (skb->data + skb->len) - ies;
                        ieee->assocresp_ies = kmemdup(ies,
                                                      ieee->assocresp_ies_len,
                                                      GFP_ATOMIC);
                        if (!ieee->assocresp_ies)
                                ieee->assocresp_ies_len = 0;

                        rtllib_associate_complete(ieee);
                } else {
                        /* aid could not been allocated */
                        ieee->softmac_stats.rx_ass_err++;
                        netdev_info(ieee->dev,
                                    "Association response status code 0x%x\n",
                                    errcode);
                        if (ieee->AsocRetryCount < RT_ASOC_RETRY_LIMIT)
                                schedule_delayed_work(
                                         &ieee->associate_procedure_wq, 0);
                        else
                                rtllib_associate_abort(ieee);
                }
        }
        return 0;
}

static void rtllib_rx_auth_resp(struct rtllib_device *ieee, struct sk_buff *skb)
{
        u16 errcode;
        u8 *challenge;
        int chlen = 0;
        bool bSupportNmode = true, bHalfSupportNmode = false;

        errcode = auth_parse(ieee->dev, skb, &challenge, &chlen);

        if (errcode) {
                ieee->softmac_stats.rx_auth_rs_err++;
                netdev_info(ieee->dev,
                            "Authentication response status code 0x%x",
                            errcode);
                rtllib_associate_abort(ieee);
                return;
        }

        if (ieee->open_wep || !challenge) {
                ieee->state = RTLLIB_ASSOCIATING_AUTHENTICATED;
                ieee->softmac_stats.rx_auth_rs_ok++;
                if (!(ieee->pHTInfo->IOTAction & HT_IOT_ACT_PURE_N_MODE)) {
                        if (!ieee->GetNmodeSupportBySecCfg(ieee->dev)) {
                                if (IsHTHalfNmodeAPs(ieee)) {
                                        bSupportNmode = true;
                                        bHalfSupportNmode = true;
                                } else {
                                        bSupportNmode = false;
                                        bHalfSupportNmode = false;
                                }
                        }
                }
                /* Dummy wirless mode setting to avoid encryption issue */
                if (bSupportNmode) {
                        ieee->SetWirelessMode(ieee->dev,
                                              ieee->current_network.mode);
                } else {
                        /*TODO*/
                        ieee->SetWirelessMode(ieee->dev, IEEE_G);
                }

                if ((ieee->current_network.mode == IEEE_N_24G) &&
                    bHalfSupportNmode) {
                        netdev_info(ieee->dev, "======>enter half N mode\n");
                        ieee->bHalfWirelessN24GMode = true;
                } else {
                        ieee->bHalfWirelessN24GMode = false;
                }
                rtllib_associate_step2(ieee);
        } else {
                rtllib_auth_challenge(ieee, challenge,  chlen);
        }
}

static inline int
rtllib_rx_auth(struct rtllib_device *ieee, struct sk_buff *skb,
               struct rtllib_rx_stats *rx_stats)
{

        if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE) {
                if (ieee->state == RTLLIB_ASSOCIATING_AUTHENTICATING &&
                    (ieee->iw_mode == IW_MODE_INFRA)) {
                        netdev_dbg(ieee->dev,
                                   "Received authentication response");
                        rtllib_rx_auth_resp(ieee, skb);
                } else if (ieee->iw_mode == IW_MODE_MASTER) {
                        rtllib_rx_auth_rq(ieee, skb);
                }
        }
        return 0;
}

static inline int
rtllib_rx_deauth(struct rtllib_device *ieee, struct sk_buff *skb)
{
        struct rtllib_hdr_3addr *header = (struct rtllib_hdr_3addr *) skb->data;
        u16 frame_ctl;

        if (memcmp(header->addr3, ieee->current_network.bssid, ETH_ALEN) != 0)
                return 0;

        /* FIXME for now repeat all the association procedure
         * both for disassociation and deauthentication
         */
        if ((ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE) &&
            ieee->state == RTLLIB_LINKED &&
            (ieee->iw_mode == IW_MODE_INFRA)) {
                frame_ctl = le16_to_cpu(header->frame_ctl);
                netdev_info(ieee->dev,
                            "==========>received disassoc/deauth(%x) frame, reason code:%x\n",
                            WLAN_FC_GET_STYPE(frame_ctl),
                            ((struct rtllib_disassoc *)skb->data)->reason);
                ieee->state = RTLLIB_ASSOCIATING;
                ieee->softmac_stats.reassoc++;
                ieee->is_roaming = true;
                ieee->LinkDetectInfo.bBusyTraffic = false;
                rtllib_disassociate(ieee);
                RemovePeerTS(ieee, header->addr2);
                if (ieee->LedControlHandler != NULL)
                        ieee->LedControlHandler(ieee->dev,
                                                LED_CTL_START_TO_LINK);

                if (!(ieee->rtllib_ap_sec_type(ieee) &
                    (SEC_ALG_CCMP|SEC_ALG_TKIP)))
                        schedule_delayed_work(
                                       &ieee->associate_procedure_wq, 5);
        }
        return 0;
}

inline int rtllib_rx_frame_softmac(struct rtllib_device *ieee,
                                   struct sk_buff *skb,
                                   struct rtllib_rx_stats *rx_stats, u16 type,
                                   u16 stype)
{
        struct rtllib_hdr_3addr *header = (struct rtllib_hdr_3addr *) skb->data;
        u16 frame_ctl;

        if (!ieee->proto_started)
                return 0;

        frame_ctl = le16_to_cpu(header->frame_ctl);
        switch (WLAN_FC_GET_STYPE(frame_ctl)) {
        case RTLLIB_STYPE_ASSOC_RESP:
        case RTLLIB_STYPE_REASSOC_RESP:
                if (rtllib_rx_assoc_resp(ieee, skb, rx_stats) == 1)
                        return 1;
                break;
        case RTLLIB_STYPE_ASSOC_REQ:
        case RTLLIB_STYPE_REASSOC_REQ:
                if ((ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE) &&
                     ieee->iw_mode == IW_MODE_MASTER)
                        rtllib_rx_assoc_rq(ieee, skb);
                break;
        case RTLLIB_STYPE_AUTH:
                rtllib_rx_auth(ieee, skb, rx_stats);
                break;
        case RTLLIB_STYPE_DISASSOC:
        case RTLLIB_STYPE_DEAUTH:
                rtllib_rx_deauth(ieee, skb);
                break;
        case RTLLIB_STYPE_MANAGE_ACT:
                rtllib_process_action(ieee, skb);
                break;
        default:
                return -1;
        }
        return 0;
}

/* following are for a simpler TX queue management.
 * Instead of using netif_[stop/wake]_queue the driver
 * will use these two functions (plus a reset one), that
 * will internally use the kernel netif_* and takes
 * care of the ieee802.11 fragmentation.
 * So the driver receives a fragment per time and might
 * call the stop function when it wants to not
 * have enough room to TX an entire packet.
 * This might be useful if each fragment needs it's own
 * descriptor, thus just keep a total free memory > than
 * the max fragmentation threshold is not enough.. If the
 * ieee802.11 stack passed a TXB struct then you need
 * to keep N free descriptors where
 * N = MAX_PACKET_SIZE / MIN_FRAG_TRESHOLD
 * In this way you need just one and the 802.11 stack
 * will take care of buffering fragments and pass them to
 * the driver later, when it wakes the queue.
 */
void rtllib_softmac_xmit(struct rtllib_txb *txb, struct rtllib_device *ieee)
{

        unsigned int queue_index = txb->queue_index;
        unsigned long flags;
        int  i;
        struct cb_desc *tcb_desc = NULL;
        unsigned long queue_len = 0;

        spin_lock_irqsave(&ieee->lock, flags);

        /* called with 2nd parm 0, no tx mgmt lock required */
        rtllib_sta_wakeup(ieee, 0);

        /* update the tx status */
        tcb_desc = (struct cb_desc *)(txb->fragments[0]->cb +
                   MAX_DEV_ADDR_SIZE);
        if (tcb_desc->bMulticast)
                ieee->stats.multicast++;

        /* if xmit available, just xmit it immediately, else just insert it to
         * the wait queue
         */
        for (i = 0; i < txb->nr_frags; i++) {
                queue_len = skb_queue_len(&ieee->skb_waitQ[queue_index]);
                if ((queue_len  != 0) ||
                    (!ieee->check_nic_enough_desc(ieee->dev, queue_index)) ||
                    (ieee->queue_stop)) {
                        /* insert the skb packet to the wait queue
                         * as for the completion function, it does not need
                         * to check it any more.
                         */
                        if (queue_len < 200)
                                skb_queue_tail(&ieee->skb_waitQ[queue_index],
                                               txb->fragments[i]);
                        else
                                kfree_skb(txb->fragments[i]);
                } else {
                        ieee->softmac_data_hard_start_xmit(
                                        txb->fragments[i],
                                        ieee->dev, ieee->rate);
                }
        }

        rtllib_txb_free(txb);

        spin_unlock_irqrestore(&ieee->lock, flags);

}

void rtllib_reset_queue(struct rtllib_device *ieee)
{
        unsigned long flags;

        spin_lock_irqsave(&ieee->lock, flags);
        init_mgmt_queue(ieee);
        if (ieee->tx_pending.txb) {
                rtllib_txb_free(ieee->tx_pending.txb);
                ieee->tx_pending.txb = NULL;
        }
        ieee->queue_stop = 0;
        spin_unlock_irqrestore(&ieee->lock, flags);

}
EXPORT_SYMBOL(rtllib_reset_queue);

void rtllib_stop_all_queues(struct rtllib_device *ieee)
{
        unsigned int i;

        for (i = 0; i < ieee->dev->num_tx_queues; i++)
                netdev_get_tx_queue(ieee->dev, i)->trans_start = jiffies;

        netif_tx_stop_all_queues(ieee->dev);
}

void rtllib_wake_all_queues(struct rtllib_device *ieee)
{
        netif_tx_wake_all_queues(ieee->dev);
}

/* called in user context only */
static void rtllib_start_master_bss(struct rtllib_device *ieee)
{
        ieee->assoc_id = 1;

        if (ieee->current_network.ssid_len == 0) {
                strncpy(ieee->current_network.ssid,
                        RTLLIB_DEFAULT_TX_ESSID,
                        IW_ESSID_MAX_SIZE);

                ieee->current_network.ssid_len =
                                 strlen(RTLLIB_DEFAULT_TX_ESSID);
                ieee->ssid_set = 1;
        }

        ether_addr_copy(ieee->current_network.bssid, ieee->dev->dev_addr);

        ieee->set_chan(ieee->dev, ieee->current_network.channel);
        ieee->state = RTLLIB_LINKED;
        ieee->link_change(ieee->dev);
        notify_wx_assoc_event(ieee);

        if (ieee->data_hard_resume)
                ieee->data_hard_resume(ieee->dev);

        netif_carrier_on(ieee->dev);
}

static void rtllib_start_monitor_mode(struct rtllib_device *ieee)
{
        /* reset hardware status */
        if (ieee->raw_tx) {
                if (ieee->data_hard_resume)
                        ieee->data_hard_resume(ieee->dev);

                netif_carrier_on(ieee->dev);
        }
}

static void rtllib_start_ibss_wq(void *data)
{
        struct rtllib_device *ieee = container_of_dwork_rsl(data,
                                     struct rtllib_device, start_ibss_wq);
        /* iwconfig mode ad-hoc will schedule this and return
         * on the other hand this will block further iwconfig SET
         * operations because of the wx_mutex hold.
         * Anyway some most set operations set a flag to speed-up
         * (abort) this wq (when syncro scanning) before sleeping
         * on the mutex
         */
        if (!ieee->proto_started) {
                netdev_info(ieee->dev, "==========oh driver down return\n");
                return;
        }
        mutex_lock(&ieee->wx_mutex);

        if (ieee->current_network.ssid_len == 0) {
                strcpy(ieee->current_network.ssid, RTLLIB_DEFAULT_TX_ESSID);
                ieee->current_network.ssid_len = strlen(RTLLIB_DEFAULT_TX_ESSID);
                ieee->ssid_set = 1;
        }

        ieee->state = RTLLIB_NOLINK;
        ieee->mode = IEEE_G;
        /* check if we have this cell in our network list */
        rtllib_softmac_check_all_nets(ieee);


        /* if not then the state is not linked. Maybe the user switched to
         * ad-hoc mode just after being in monitor mode, or just after
         * being very few time in managed mode (so the card have had no
         * time to scan all the chans..) or we have just run up the iface
         * after setting ad-hoc mode. So we have to give another try..
         * Here, in ibss mode, should be safe to do this without extra care
         * (in bss mode we had to make sure no-one tried to associate when
         * we had just checked the ieee->state and we was going to start the
         * scan) because in ibss mode the rtllib_new_net function, when
         * finds a good net, just set the ieee->state to RTLLIB_LINKED,
         * so, at worst, we waste a bit of time to initiate an unneeded syncro
         * scan, that will stop at the first round because it sees the state
         * associated.
         */
        if (ieee->state == RTLLIB_NOLINK)
                rtllib_start_scan_syncro(ieee, 0);

        /* the network definitively is not here.. create a new cell */
        if (ieee->state == RTLLIB_NOLINK) {
                netdev_info(ieee->dev, "creating new IBSS cell\n");
                ieee->current_network.channel = ieee->bss_start_channel;
                if (!ieee->wap_set)
                        eth_random_addr(ieee->current_network.bssid);

                if (ieee->modulation & RTLLIB_CCK_MODULATION) {

                        ieee->current_network.rates_len = 4;

                        ieee->current_network.rates[0] =
                                 RTLLIB_BASIC_RATE_MASK | RTLLIB_CCK_RATE_1MB;
                        ieee->current_network.rates[1] =
                                 RTLLIB_BASIC_RATE_MASK | RTLLIB_CCK_RATE_2MB;
                        ieee->current_network.rates[2] =
                                 RTLLIB_BASIC_RATE_MASK | RTLLIB_CCK_RATE_5MB;
                        ieee->current_network.rates[3] =
                                 RTLLIB_BASIC_RATE_MASK | RTLLIB_CCK_RATE_11MB;

                } else
                        ieee->current_network.rates_len = 0;

                if (ieee->modulation & RTLLIB_OFDM_MODULATION) {
                        ieee->current_network.rates_ex_len = 8;

                        ieee->current_network.rates_ex[0] =
                                                 RTLLIB_OFDM_RATE_6MB;
                        ieee->current_network.rates_ex[1] =
                                                 RTLLIB_OFDM_RATE_9MB;
                        ieee->current_network.rates_ex[2] =
                                                 RTLLIB_OFDM_RATE_12MB;
                        ieee->current_network.rates_ex[3] =
                                                 RTLLIB_OFDM_RATE_18MB;
                        ieee->current_network.rates_ex[4] =
                                                 RTLLIB_OFDM_RATE_24MB;
                        ieee->current_network.rates_ex[5] =
                                                 RTLLIB_OFDM_RATE_36MB;
                        ieee->current_network.rates_ex[6] =
                                                 RTLLIB_OFDM_RATE_48MB;
                        ieee->current_network.rates_ex[7] =
                                                 RTLLIB_OFDM_RATE_54MB;

                        ieee->rate = 108;
                } else {
                        ieee->current_network.rates_ex_len = 0;
                        ieee->rate = 22;
                }

                ieee->current_network.qos_data.supported = 0;
                ieee->SetWirelessMode(ieee->dev, IEEE_G);
                ieee->current_network.mode = ieee->mode;
                ieee->current_network.atim_window = 0;
                ieee->current_network.capability = WLAN_CAPABILITY_IBSS;
        }

        netdev_info(ieee->dev, "%s(): ieee->mode = %d\n", __func__, ieee->mode);
        if ((ieee->mode == IEEE_N_24G) || (ieee->mode == IEEE_N_5G))
                HTUseDefaultSetting(ieee);
        else
                ieee->pHTInfo->bCurrentHTSupport = false;

        ieee->SetHwRegHandler(ieee->dev, HW_VAR_MEDIA_STATUS,
                              (u8 *)(&ieee->state));

        ieee->state = RTLLIB_LINKED;
        ieee->link_change(ieee->dev);

        HTSetConnectBwMode(ieee, HT_CHANNEL_WIDTH_20, HT_EXTCHNL_OFFSET_NO_EXT);
        if (ieee->LedControlHandler != NULL)
                ieee->LedControlHandler(ieee->dev, LED_CTL_LINK);

        rtllib_start_send_beacons(ieee);

        notify_wx_assoc_event(ieee);

        if (ieee->data_hard_resume)
                ieee->data_hard_resume(ieee->dev);

        netif_carrier_on(ieee->dev);

        mutex_unlock(&ieee->wx_mutex);
}

inline void rtllib_start_ibss(struct rtllib_device *ieee)
{
        schedule_delayed_work(&ieee->start_ibss_wq, msecs_to_jiffies(150));
}

/* this is called only in user context, with wx_mutex held */
static void rtllib_start_bss(struct rtllib_device *ieee)
{
        unsigned long flags;

        if (IS_DOT11D_ENABLE(ieee) && !IS_COUNTRY_IE_VALID(ieee)) {
                if (!ieee->global_domain)
                        return;
        }
        /* check if we have already found the net we
         * are interested in (if any).
         * if not (we are disassociated and we are not
         * in associating / authenticating phase) start the background scanning.
         */
        rtllib_softmac_check_all_nets(ieee);

        /* ensure no-one start an associating process (thus setting
         * the ieee->state to rtllib_ASSOCIATING) while we
         * have just checked it and we are going to enable scan.
         * The rtllib_new_net function is always called with
         * lock held (from both rtllib_softmac_check_all_nets and
         * the rx path), so we cannot be in the middle of such function
         */
        spin_lock_irqsave(&ieee->lock, flags);

        if (ieee->state == RTLLIB_NOLINK)
                rtllib_start_scan(ieee);
        spin_unlock_irqrestore(&ieee->lock, flags);
}

static void rtllib_link_change_wq(void *data)
{
        struct rtllib_device *ieee = container_of_dwork_rsl(data,
                                     struct rtllib_device, link_change_wq);
        ieee->link_change(ieee->dev);
}
/* called only in userspace context */
void rtllib_disassociate(struct rtllib_device *ieee)
{
        netif_carrier_off(ieee->dev);
        if (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE)
                rtllib_reset_queue(ieee);

        if (ieee->data_hard_stop)
                ieee->data_hard_stop(ieee->dev);
        if (IS_DOT11D_ENABLE(ieee))
                dot11d_reset(ieee);
        ieee->state = RTLLIB_NOLINK;
        ieee->is_set_key = false;
        ieee->wap_set = 0;

        schedule_delayed_work(&ieee->link_change_wq, 0);

        notify_wx_assoc_event(ieee);
}

static void rtllib_associate_retry_wq(void *data)
{
        struct rtllib_device *ieee = container_of_dwork_rsl(data,
                                     struct rtllib_device, associate_retry_wq);
        unsigned long flags;

        mutex_lock(&ieee->wx_mutex);
        if (!ieee->proto_started)
                goto exit;

        if (ieee->state != RTLLIB_ASSOCIATING_RETRY)
                goto exit;

        /* until we do not set the state to RTLLIB_NOLINK
         * there are no possibility to have someone else trying
         * to start an association procedure (we get here with
         * ieee->state = RTLLIB_ASSOCIATING).
         * When we set the state to RTLLIB_NOLINK it is possible
         * that the RX path run an attempt to associate, but
         * both rtllib_softmac_check_all_nets and the
         * RX path works with ieee->lock held so there are no
         * problems. If we are still disassociated then start a scan.
         * the lock here is necessary to ensure no one try to start
         * an association procedure when we have just checked the
         * state and we are going to start the scan.
         */
        ieee->beinretry = true;
        ieee->state = RTLLIB_NOLINK;

        rtllib_softmac_check_all_nets(ieee);

        spin_lock_irqsave(&ieee->lock, flags);

        if (ieee->state == RTLLIB_NOLINK)
                rtllib_start_scan(ieee);
        spin_unlock_irqrestore(&ieee->lock, flags);

        ieee->beinretry = false;
exit:
        mutex_unlock(&ieee->wx_mutex);
}

static struct sk_buff *rtllib_get_beacon_(struct rtllib_device *ieee)
{
        static const u8 broadcast_addr[] = {
                0xff, 0xff, 0xff, 0xff, 0xff, 0xff
        };
        struct sk_buff *skb;
        struct rtllib_probe_response *b;

        skb = rtllib_probe_resp(ieee, broadcast_addr);

        if (!skb)
                return NULL;

        b = (struct rtllib_probe_response *) skb->data;
        b->header.frame_ctl = cpu_to_le16(RTLLIB_STYPE_BEACON);

        return skb;

}

struct sk_buff *rtllib_get_beacon(struct rtllib_device *ieee)
{
        struct sk_buff *skb;
        struct rtllib_probe_response *b;

        skb = rtllib_get_beacon_(ieee);
        if (!skb)
                return NULL;

        b = (struct rtllib_probe_response *) skb->data;
        b->header.seq_ctl = cpu_to_le16(ieee->seq_ctrl[0] << 4);

        if (ieee->seq_ctrl[0] == 0xFFF)
                ieee->seq_ctrl[0] = 0;
        else
                ieee->seq_ctrl[0]++;

        return skb;
}
EXPORT_SYMBOL(rtllib_get_beacon);

void rtllib_softmac_stop_protocol(struct rtllib_device *ieee, u8 mesh_flag,
                                  u8 shutdown)
{
        rtllib_stop_scan_syncro(ieee);
        mutex_lock(&ieee->wx_mutex);
        rtllib_stop_protocol(ieee, shutdown);
        mutex_unlock(&ieee->wx_mutex);
}
EXPORT_SYMBOL(rtllib_softmac_stop_protocol);


void rtllib_stop_protocol(struct rtllib_device *ieee, u8 shutdown)
{
        if (!ieee->proto_started)
                return;

        if (shutdown) {
                ieee->proto_started = 0;
                ieee->proto_stoppping = 1;
                if (ieee->rtllib_ips_leave != NULL)
                        ieee->rtllib_ips_leave(ieee->dev);
        }

        rtllib_stop_send_beacons(ieee);
        del_timer_sync(&ieee->associate_timer);
        cancel_delayed_work_sync(&ieee->associate_retry_wq);
        cancel_delayed_work_sync(&ieee->start_ibss_wq);
        cancel_delayed_work_sync(&ieee->link_change_wq);
        rtllib_stop_scan(ieee);

        if (ieee->state <= RTLLIB_ASSOCIATING_AUTHENTICATED)
                ieee->state = RTLLIB_NOLINK;

        if (ieee->state == RTLLIB_LINKED) {
                if (ieee->iw_mode == IW_MODE_INFRA)
                        SendDisassociation(ieee, 1, WLAN_REASON_DEAUTH_LEAVING);
                rtllib_disassociate(ieee);
        }

        if (shutdown) {
                RemoveAllTS(ieee);
                ieee->proto_stoppping = 0;
        }
        kfree(ieee->assocreq_ies);
        ieee->assocreq_ies = NULL;
        ieee->assocreq_ies_len = 0;
        kfree(ieee->assocresp_ies);
        ieee->assocresp_ies = NULL;
        ieee->assocresp_ies_len = 0;
}

void rtllib_softmac_start_protocol(struct rtllib_device *ieee, u8 mesh_flag)
{
        mutex_lock(&ieee->wx_mutex);
        rtllib_start_protocol(ieee);
        mutex_unlock(&ieee->wx_mutex);
}
EXPORT_SYMBOL(rtllib_softmac_start_protocol);

void rtllib_start_protocol(struct rtllib_device *ieee)
{
        short ch = 0;
        int i = 0;

        rtllib_update_active_chan_map(ieee);

        if (ieee->proto_started)
                return;

        ieee->proto_started = 1;

        if (ieee->current_network.channel == 0) {
                do {
                        ch++;
                        if (ch > MAX_CHANNEL_NUMBER)
                                return; /* no channel found */
                } while (!ieee->active_channel_map[ch]);
                ieee->current_network.channel = ch;
        }

        if (ieee->current_network.beacon_interval == 0)
                ieee->current_network.beacon_interval = 100;

        for (i = 0; i < 17; i++) {
                ieee->last_rxseq_num[i] = -1;
                ieee->last_rxfrag_num[i] = -1;
                ieee->last_packet_time[i] = 0;
        }

        if (ieee->UpdateBeaconInterruptHandler)
                ieee->UpdateBeaconInterruptHandler(ieee->dev, false);

        ieee->wmm_acm = 0;
        /* if the user set the MAC of the ad-hoc cell and then
         * switch to managed mode, shall we  make sure that association
         * attempts does not fail just because the user provide the essid
         * and the nic is still checking for the AP MAC ??
         */
        if (ieee->iw_mode == IW_MODE_INFRA) {
                rtllib_start_bss(ieee);
        } else if (ieee->iw_mode == IW_MODE_ADHOC) {
                if (ieee->UpdateBeaconInterruptHandler)
                        ieee->UpdateBeaconInterruptHandler(ieee->dev, true);

                rtllib_start_ibss(ieee);

        } else if (ieee->iw_mode == IW_MODE_MASTER) {
                rtllib_start_master_bss(ieee);
        } else if (ieee->iw_mode == IW_MODE_MONITOR) {
                rtllib_start_monitor_mode(ieee);
        }
}

void rtllib_softmac_init(struct rtllib_device *ieee)
{
        int i;

        memset(&ieee->current_network, 0, sizeof(struct rtllib_network));

        ieee->state = RTLLIB_NOLINK;
        for (i = 0; i < 5; i++)
                ieee->seq_ctrl[i] = 0;
        ieee->dot11d_info = kzalloc(sizeof(struct rt_dot11d_info), GFP_ATOMIC);
        if (!ieee->dot11d_info)
                netdev_err(ieee->dev, "Can't alloc memory for DOT11D\n");
        ieee->LinkDetectInfo.SlotIndex = 0;
        ieee->LinkDetectInfo.SlotNum = 2;
        ieee->LinkDetectInfo.NumRecvBcnInPeriod = 0;
        ieee->LinkDetectInfo.NumRecvDataInPeriod = 0;
        ieee->LinkDetectInfo.NumTxOkInPeriod = 0;
        ieee->LinkDetectInfo.NumRxOkInPeriod = 0;
        ieee->LinkDetectInfo.NumRxUnicastOkInPeriod = 0;
        ieee->bIsAggregateFrame = false;
        ieee->assoc_id = 0;
        ieee->queue_stop = 0;
        ieee->scanning_continue = 0;
        ieee->softmac_features = 0;
        ieee->wap_set = 0;
        ieee->ssid_set = 0;
        ieee->proto_started = 0;
        ieee->proto_stoppping = 0;
        ieee->basic_rate = RTLLIB_DEFAULT_BASIC_RATE;
        ieee->rate = 22;
        ieee->ps = RTLLIB_PS_DISABLED;
        ieee->sta_sleep = LPS_IS_WAKE;

        ieee->Regdot11HTOperationalRateSet[0] = 0xff;
        ieee->Regdot11HTOperationalRateSet[1] = 0xff;
        ieee->Regdot11HTOperationalRateSet[4] = 0x01;

        ieee->Regdot11TxHTOperationalRateSet[0] = 0xff;
        ieee->Regdot11TxHTOperationalRateSet[1] = 0xff;
        ieee->Regdot11TxHTOperationalRateSet[4] = 0x01;

        ieee->FirstIe_InScan = false;
        ieee->actscanning = false;
        ieee->beinretry = false;
        ieee->is_set_key = false;
        init_mgmt_queue(ieee);