ieee80211_softmac_wx.c

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/* IEEE 802.11 SoftMAC layer
 * Copyright (c) 2005 Andrea Merello <[email protected]>
 *
 * Mostly extracted from the rtl8180-sa2400 driver for the
 * in-kernel generic ieee802.11 stack.
 *
 * Some pieces of code might be stolen from ipw2100 driver
 * copyright of who own it's copyright ;-)
 *
 * PS wx handler mostly stolen from hostap, copyright who
 * own it's copyright ;-)
 *
 * released under the GPL
 */


#include <linux/etherdevice.h>

#include "ieee80211.h"

/* FIXME: add A freqs */

const long ieee80211_wlan_frequencies[] = {
    2412, 2417, 2422, 2427,
    2432, 2437, 2442, 2447,
    2452, 2457, 2462, 2467,
    2472, 2484
};


int ieee80211_wx_set_freq(struct ieee80211_device *ieee, struct iw_request_info *a,
                 union iwreq_data *wrqu, char *b)
{
    int ret;
    struct iw_freq *fwrq = & wrqu->freq;
//  printk("in %s\n",__func__);
    down(&ieee->wx_sem);

    if(ieee->iw_mode == IW_MODE_INFRA){
        ret = -EOPNOTSUPP;
        goto out;
    }

    /* if setting by freq convert to channel */
    if (fwrq->e == 1) {
        if ((fwrq->m >= (int) 2.412e8 &&
             fwrq->m <= (int) 2.487e8)) {
            int f = fwrq->m / 100000;
            int c = 0;

            while ((c < 14) && (f != ieee80211_wlan_frequencies[c]))
                c++;

            /* hack to fall through */
            fwrq->e = 0;
            fwrq->m = c + 1;
        }
    }

    if (fwrq->e > 0 || fwrq->m > 14 || fwrq->m < 1 ){
        ret = -EOPNOTSUPP;
        goto out;

    }else { /* Set the channel */


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

        if(ieee->iw_mode == IW_MODE_ADHOC || ieee->iw_mode == IW_MODE_MASTER)
            if(ieee->state == IEEE80211_LINKED){

            ieee80211_stop_send_beacons(ieee);
            ieee80211_start_send_beacons(ieee);
            }
    }

    ret = 0;
out:
    up(&ieee->wx_sem);
    return ret;
}


int ieee80211_wx_get_freq(struct ieee80211_device *ieee,
                 struct iw_request_info *a,
                 union iwreq_data *wrqu, char *b)
{
    struct iw_freq *fwrq = & wrqu->freq;

    if (ieee->current_network.channel == 0)
        return -1;

    fwrq->m = ieee->current_network.channel;
    fwrq->e = 0;

    return 0;
}

int ieee80211_wx_get_wap(struct ieee80211_device *ieee,
                struct iw_request_info *info,
                union iwreq_data *wrqu, char *extra)
{
    unsigned long flags;

    wrqu->ap_addr.sa_family = ARPHRD_ETHER;

    if (ieee->iw_mode == IW_MODE_MONITOR)
        return -1;

    /* We want avoid to give to the user inconsistent infos*/
    spin_lock_irqsave(&ieee->lock, flags);

    if (ieee->state != IEEE80211_LINKED &&
        ieee->state != IEEE80211_LINKED_SCANNING &&
        ieee->wap_set == 0)

        memset(wrqu->ap_addr.sa_data, 0, ETH_ALEN);
    else
        memcpy(wrqu->ap_addr.sa_data,
               ieee->current_network.bssid, ETH_ALEN);

    spin_unlock_irqrestore(&ieee->lock, flags);

    return 0;
}


int ieee80211_wx_set_wap(struct ieee80211_device *ieee,
             struct iw_request_info *info,
             union iwreq_data *awrq,
             char *extra)
{

    int ret = 0;
    unsigned long flags;

    short ifup = ieee->proto_started;//dev->flags & IFF_UP;
    struct sockaddr *temp = (struct sockaddr *)awrq;

    //printk("=======Set WAP:");
    ieee->sync_scan_hurryup = 1;

    down(&ieee->wx_sem);
    /* use ifconfig hw ether */
    if (ieee->iw_mode == IW_MODE_MASTER){
        ret = -1;
        goto out;
    }

    if (temp->sa_family != ARPHRD_ETHER){
        ret = -EINVAL;
        goto out;
    }

    if (ifup)
        ieee80211_stop_protocol(ieee);

    /* just to avoid to give inconsistent infos in the
     * get wx method. not really needed otherwise
     */
    spin_lock_irqsave(&ieee->lock, flags);

    memcpy(ieee->current_network.bssid, temp->sa_data, ETH_ALEN);
    ieee->wap_set = !is_zero_ether_addr(temp->sa_data);
    //printk(" %x:%x:%x:%x:%x:%x\n", ieee->current_network.bssid[0],ieee->current_network.bssid[1],ieee->current_network.bssid[2],ieee->current_network.bssid[3],ieee->current_network.bssid[4],ieee->current_network.bssid[5]);

    spin_unlock_irqrestore(&ieee->lock, flags);

    if (ifup)
        ieee80211_start_protocol(ieee);

out:
    up(&ieee->wx_sem);
    return ret;
}

 int ieee80211_wx_get_essid(struct ieee80211_device *ieee, struct iw_request_info *a,union iwreq_data *wrqu,char *b)
{
    int len,ret = 0;
    unsigned long flags;

    if (ieee->iw_mode == IW_MODE_MONITOR)
        return -1;

    /* We want avoid to give to the user inconsistent infos*/
    spin_lock_irqsave(&ieee->lock, flags);

    if (ieee->current_network.ssid[0] == '\0' ||
        ieee->current_network.ssid_len == 0){
        ret = -1;
        goto out;
    }

    if (ieee->state != IEEE80211_LINKED &&
        ieee->state != IEEE80211_LINKED_SCANNING &&
        ieee->ssid_set == 0){
        ret = -1;
        goto out;
    }
    len = ieee->current_network.ssid_len;
    wrqu->essid.length = len;
    strncpy(b,ieee->current_network.ssid,len);
    wrqu->essid.flags = 1;

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

    return ret;

}

int ieee80211_wx_set_rate(struct ieee80211_device *ieee,
                 struct iw_request_info *info,
                 union iwreq_data *wrqu, char *extra)
{

    u32 target_rate = wrqu->bitrate.value;

    //added by lizhaoming for auto mode
    if(target_rate == -1){
    ieee->rate = 110;
    } else {
    ieee->rate = target_rate/100000;
    }
    //FIXME: we might want to limit rate also in management protocols.
    return 0;
}



int ieee80211_wx_get_rate(struct ieee80211_device *ieee,
                 struct iw_request_info *info,
                 union iwreq_data *wrqu, char *extra)
{

    wrqu->bitrate.value = ieee->rate * 100000;

    return 0;
}

int ieee80211_wx_set_mode(struct ieee80211_device *ieee, struct iw_request_info *a,
                 union iwreq_data *wrqu, char *b)
{

    ieee->sync_scan_hurryup = 1;

    down(&ieee->wx_sem);

    if (wrqu->mode == ieee->iw_mode)
        goto out;

    if (wrqu->mode == IW_MODE_MONITOR){

        ieee->dev->type = ARPHRD_IEEE80211;
    }else{
        ieee->dev->type = ARPHRD_ETHER;
    }

    if (!ieee->proto_started){
        ieee->iw_mode = wrqu->mode;
    }else{
        ieee80211_stop_protocol(ieee);
        ieee->iw_mode = wrqu->mode;
        ieee80211_start_protocol(ieee);
    }

out:
    up(&ieee->wx_sem);
    return 0;
}


void ieee80211_wx_sync_scan_wq(struct work_struct *work)
{
    struct ieee80211_device *ieee = container_of(work, struct ieee80211_device, wx_sync_scan_wq);
    short chan;

    chan = ieee->current_network.channel;

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

    ieee80211_stop_send_beacons(ieee);

    ieee->state = IEEE80211_LINKED_SCANNING;
    ieee->link_change(ieee->dev);

    ieee80211_start_scan_syncro(ieee);

    ieee->set_chan(ieee->dev, chan);

    ieee->state = IEEE80211_LINKED;
    ieee->link_change(ieee->dev);

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

    if(ieee->iw_mode == IW_MODE_ADHOC || ieee->iw_mode == IW_MODE_MASTER)
        ieee80211_start_send_beacons(ieee);

    //YJ,add,080828, In prevent of lossing ping packet during scanning
    //ieee80211_sta_ps_send_null_frame(ieee, false);
    //YJ,add,080828,end

    up(&ieee->wx_sem);

}

int ieee80211_wx_set_scan(struct ieee80211_device *ieee, struct iw_request_info *a,
                 union iwreq_data *wrqu, char *b)
{
    int ret = 0;

    down(&ieee->wx_sem);

    if (ieee->iw_mode == IW_MODE_MONITOR || !(ieee->proto_started)){
        ret = -1;
        goto out;
    }
    //YJ,add,080828
    //In prevent of lossing ping packet during scanning
    //ieee80211_sta_ps_send_null_frame(ieee, true);
    //YJ,add,080828,end

    if ( ieee->state == IEEE80211_LINKED){
        queue_work(ieee->wq, &ieee->wx_sync_scan_wq);
        /* intentionally forget to up sem */
        return 0;
    }

out:
    up(&ieee->wx_sem);
    return ret;
}

int ieee80211_wx_set_essid(struct ieee80211_device *ieee,
                  struct iw_request_info *a,
                  union iwreq_data *wrqu, char *extra)
{

    int ret=0,len;
    short proto_started;
    unsigned long flags;

    ieee->sync_scan_hurryup = 1;

    down(&ieee->wx_sem);

    proto_started = ieee->proto_started;

    if (wrqu->essid.length > IW_ESSID_MAX_SIZE){
        ret= -E2BIG;
        goto out;
    }

    if (ieee->iw_mode == IW_MODE_MONITOR){
        ret= -1;
        goto out;
    }

    if(proto_started)
        ieee80211_stop_protocol(ieee);

    /* this is just to be sure that the GET wx callback
     * has consistent infos. not needed otherwise
     */
    spin_lock_irqsave(&ieee->lock, flags);

    if (wrqu->essid.flags && wrqu->essid.length) {
//YJ,modified,080819
        len = (wrqu->essid.length < IW_ESSID_MAX_SIZE) ? (wrqu->essid.length) : IW_ESSID_MAX_SIZE;
        memset(ieee->current_network.ssid, 0, ieee->current_network.ssid_len); //YJ,add,080819
        strncpy(ieee->current_network.ssid, extra, len);
        ieee->current_network.ssid_len = len;
        ieee->ssid_set = 1;
//YJ,modified,080819,end

        //YJ,add,080819,for hidden ap
        if(len == 0){
            memset(ieee->current_network.bssid, 0, ETH_ALEN);
            ieee->current_network.capability = 0;
        }
        //YJ,add,080819,for hidden ap,end
    }
    else{
        ieee->ssid_set = 0;
        ieee->current_network.ssid[0] = '\0';
        ieee->current_network.ssid_len = 0;
    }
    //printk("==========set essid %s!\n",ieee->current_network.ssid);
    spin_unlock_irqrestore(&ieee->lock, flags);

    if (proto_started)
        ieee80211_start_protocol(ieee);
out:
    up(&ieee->wx_sem);
    return ret;
}

 int ieee80211_wx_get_mode(struct ieee80211_device *ieee, struct iw_request_info *a,
                 union iwreq_data *wrqu, char *b)
{

    wrqu->mode = ieee->iw_mode;
    return 0;
}

 int ieee80211_wx_set_rawtx(struct ieee80211_device *ieee,
                   struct iw_request_info *info,
                   union iwreq_data *wrqu, char *extra)
{

    int *parms = (int *)extra;
    int enable = (parms[0] > 0);
    short prev = ieee->raw_tx;

    down(&ieee->wx_sem);

    if(enable)
        ieee->raw_tx = 1;
    else
        ieee->raw_tx = 0;

    printk(KERN_INFO"raw TX is %s\n",
          ieee->raw_tx ? "enabled" : "disabled");

    if(ieee->iw_mode == IW_MODE_MONITOR)
    {
        if(prev == 0 && ieee->raw_tx){
            if (ieee->data_hard_resume)
                ieee->data_hard_resume(ieee->dev);

            netif_carrier_on(ieee->dev);
        }

        if(prev && ieee->raw_tx == 1)
            netif_carrier_off(ieee->dev);
    }

    up(&ieee->wx_sem);

    return 0;
}

int ieee80211_wx_get_name(struct ieee80211_device *ieee,
                 struct iw_request_info *info,
                 union iwreq_data *wrqu, char *extra)
{
    strlcpy(wrqu->name, "802.11", IFNAMSIZ);
    if(ieee->modulation & IEEE80211_CCK_MODULATION){
        strlcat(wrqu->name, "b", IFNAMSIZ);
        if(ieee->modulation & IEEE80211_OFDM_MODULATION)
            strlcat(wrqu->name, "/g", IFNAMSIZ);
    }else if(ieee->modulation & IEEE80211_OFDM_MODULATION)
        strlcat(wrqu->name, "g", IFNAMSIZ);

    if((ieee->state == IEEE80211_LINKED) ||
        (ieee->state == IEEE80211_LINKED_SCANNING))
        strlcat(wrqu->name,"  link", IFNAMSIZ);
    else if(ieee->state != IEEE80211_NOLINK)
        strlcat(wrqu->name," .....", IFNAMSIZ);


    return 0;
}


/* this is mostly stolen from hostap */
int ieee80211_wx_set_power(struct ieee80211_device *ieee,
                 struct iw_request_info *info,
                 union iwreq_data *wrqu, char *extra)
{
    int ret = 0;

    if(
        (!ieee->sta_wake_up) ||
        (!ieee->ps_request_tx_ack) ||
        (!ieee->enter_sleep_state) ||
        (!ieee->ps_is_queue_empty)){

        printk("ERROR. PS mode tried to be use but driver missed a callback\n\n");

        return -1;
    }

    down(&ieee->wx_sem);

    if (wrqu->power.disabled){
        ieee->ps = IEEE80211_PS_DISABLED;

        goto exit;
    }
    switch (wrqu->power.flags & IW_POWER_MODE) {
    case IW_POWER_UNICAST_R:
        ieee->ps = IEEE80211_PS_UNICAST;

        break;
    case IW_POWER_ALL_R:
        ieee->ps = IEEE80211_PS_UNICAST | IEEE80211_PS_MBCAST;
        break;

    case IW_POWER_ON:
        ieee->ps = IEEE80211_PS_DISABLED;
        break;

    default:
        ret = -EINVAL;
        goto exit;
    }

    if (wrqu->power.flags & IW_POWER_TIMEOUT) {

        ieee->ps_timeout = wrqu->power.value / 1000;
        printk("Timeout %d\n",ieee->ps_timeout);
    }

    if (wrqu->power.flags & IW_POWER_PERIOD) {

        ret = -EOPNOTSUPP;
        goto exit;
        //wrq->value / 1024;

    }
exit:
    up(&ieee->wx_sem);
    return ret;

}

/* this is stolen from hostap */
int ieee80211_wx_get_power(struct ieee80211_device *ieee,
                 struct iw_request_info *info,
                 union iwreq_data *wrqu, char *extra)
{
    int ret =0;

    down(&ieee->wx_sem);

    if(ieee->ps == IEEE80211_PS_DISABLED){
        wrqu->power.disabled = 1;
        goto exit;
    }

    wrqu->power.disabled = 0;

//  if ((wrqu->power.flags & IW_POWER_TYPE) == IW_POWER_TIMEOUT) {
        wrqu->power.flags = IW_POWER_TIMEOUT;
        wrqu->power.value = ieee->ps_timeout * 1000;
//  } else {
//      ret = -EOPNOTSUPP;
//      goto exit;
        //wrqu->power.flags = IW_POWER_PERIOD;
        //wrqu->power.value = ieee->current_network.dtim_period *
        //  ieee->current_network.beacon_interval * 1024;
//  }


    if (ieee->ps & IEEE80211_PS_MBCAST)
        wrqu->power.flags |= IW_POWER_ALL_R;
    else
        wrqu->power.flags |= IW_POWER_UNICAST_R;

exit:
    up(&ieee->wx_sem);
    return ret;

}