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"
#include "dot11d.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;

    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 */

        if (!(GET_DOT11D_INFO(ieee)->channel_map)[fwrq->m]) {
            ret = -EINVAL;
            goto out;
        }
        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;
    //NM 0.7.0 will not accept channel any more.
    fwrq->m = ieee80211_wlan_frequencies[ieee->current_network.channel-1] * 100000;
    fwrq->e = 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;

    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);

    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;

    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)
{
    u32 tmp_rate;
    tmp_rate = TxCountToDataRate(ieee, ieee->softmac_stats.CurrentShowTxate);

    wrqu->bitrate.value = tmp_rate * 500000;

    return 0;
}


int ieee80211_wx_set_rts(struct ieee80211_device *ieee,
                 struct iw_request_info *info,
                 union iwreq_data *wrqu, char *extra)
{
    if (wrqu->rts.disabled || !wrqu->rts.fixed)
        ieee->rts = DEFAULT_RTS_THRESHOLD;
    else
    {
        if (wrqu->rts.value < MIN_RTS_THRESHOLD ||
                wrqu->rts.value > MAX_RTS_THRESHOLD)
            return -EINVAL;
        ieee->rts = wrqu->rts.value;
    }
    return 0;
}

int ieee80211_wx_get_rts(struct ieee80211_device *ieee,
                 struct iw_request_info *info,
                 union iwreq_data *wrqu, char *extra)
{
    wrqu->rts.value = ieee->rts;
    wrqu->rts.fixed = 0;    /* no auto select */
    wrqu->rts.disabled = (wrqu->rts.value == DEFAULT_RTS_THRESHOLD);
    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;
    HT_EXTCHNL_OFFSET chan_offset=0;
    HT_CHANNEL_WIDTH bandwidth=0;
    int b40M = 0;
    static int count = 0;
    chan = ieee->current_network.channel;
    netif_carrier_off(ieee->dev);

    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);
    ieee->InitialGainHandler(ieee->dev,IG_Backup);
    if (ieee->pHTInfo->bCurrentHTSupport && ieee->pHTInfo->bEnableHT && ieee->pHTInfo->bCurBW40MHz) {
        b40M = 1;
        chan_offset = ieee->pHTInfo->CurSTAExtChnlOffset;
        bandwidth = (HT_CHANNEL_WIDTH)ieee->pHTInfo->bCurBW40MHz;
        printk("Scan in 40M, force to 20M first:%d, %d\n", chan_offset, bandwidth);
        ieee->SetBWModeHandler(ieee->dev, HT_CHANNEL_WIDTH_20, HT_EXTCHNL_OFFSET_NO_EXT);
        }
    ieee80211_start_scan_syncro(ieee);
    if (b40M) {
        printk("Scan in 20M, back to 40M\n");
        if (chan_offset == HT_EXTCHNL_OFFSET_UPPER)
            ieee->set_chan(ieee->dev, chan + 2);
        else if (chan_offset == HT_EXTCHNL_OFFSET_LOWER)
            ieee->set_chan(ieee->dev, chan - 2);
        else
            ieee->set_chan(ieee->dev, chan);
        ieee->SetBWModeHandler(ieee->dev, bandwidth, chan_offset);
    } else {
        ieee->set_chan(ieee->dev, chan);
    }

    ieee->InitialGainHandler(ieee->dev,IG_Restore);
    ieee->state = IEEE80211_LINKED;
    ieee->link_change(ieee->dev);
    // To prevent the immediately calling watch_dog after scan.
    if(ieee->LinkDetectInfo.NumRecvBcnInPeriod==0||ieee->LinkDetectInfo.NumRecvDataInPeriod==0 )
    {
        ieee->LinkDetectInfo.NumRecvBcnInPeriod = 1;
        ieee->LinkDetectInfo.NumRecvDataInPeriod= 1;
    }
    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);

    netif_carrier_on(ieee->dev);
    count = 0;
    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;
    }

    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 consisten infos. not needed otherwise
     */
    spin_lock_irqsave(&ieee->lock, flags);

    if (wrqu->essid.flags && wrqu->essid.length) {
        //first flush current network.ssid
        len = ((wrqu->essid.length-1) < IW_ESSID_MAX_SIZE) ? (wrqu->essid.length-1) : IW_ESSID_MAX_SIZE;
        strncpy(ieee->current_network.ssid, extra, len+1);
        ieee->current_network.ssid_len = len+1;
        ieee->ssid_set = 1;
    }
    else{
        ieee->ssid_set = 0;
        ieee->current_network.ssid[0] = '\0';
        ieee->current_network.ssid_len = 0;
    }
    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)
{
    strcpy(wrqu->name, "802.11");
    if(ieee->modulation & IEEE80211_CCK_MODULATION){
        strcat(wrqu->name, "b");
        if(ieee->modulation & IEEE80211_OFDM_MODULATION)
            strcat(wrqu->name, "/g");
    }else if(ieee->modulation & IEEE80211_OFDM_MODULATION)
        strcat(wrqu->name, "g");
    if (ieee->mode & (IEEE_N_24G | IEEE_N_5G))
        strcat(wrqu->name, "/n");

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


    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;
    down(&ieee->wx_sem);

    if (wrqu->power.disabled){
        ieee->ps = IEEE80211_PS_DISABLED;
        goto exit;
    }
    if (wrqu->power.flags & IW_POWER_TIMEOUT) {
        //ieee->ps_period = wrqu->power.value / 1000;
        ieee->ps_timeout = wrqu->power.value / 1000;
    }

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

        //ieee->ps_timeout = wrqu->power.value / 1000;
        ieee->ps_period = wrqu->power.value / 1000;
        //wrq->value / 1024;

    }
    switch (wrqu->power.flags & IW_POWER_MODE) {
    case IW_POWER_UNICAST_R:
        ieee->ps = IEEE80211_PS_UNICAST;
        break;
    case IW_POWER_MULTICAST_R:
        ieee->ps = IEEE80211_PS_MBCAST;
        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;

    }
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->ps_period * 1000;
//ieee->current_network.dtim_period * ieee->current_network.beacon_interval * 1024;
    }

       if ((ieee->ps & (IEEE80211_PS_MBCAST | IEEE80211_PS_UNICAST)) == (IEEE80211_PS_MBCAST | IEEE80211_PS_UNICAST))
        wrqu->power.flags |= IW_POWER_ALL_R;
    else if (ieee->ps & IEEE80211_PS_MBCAST)
        wrqu->power.flags |= IW_POWER_MULTICAST_R;
    else
        wrqu->power.flags |= IW_POWER_UNICAST_R;

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

}
EXPORT_SYMBOL(ieee80211_wx_get_essid);
EXPORT_SYMBOL(ieee80211_wx_set_essid);
EXPORT_SYMBOL(ieee80211_wx_set_rate);
EXPORT_SYMBOL(ieee80211_wx_get_rate);
EXPORT_SYMBOL(ieee80211_wx_set_wap);
EXPORT_SYMBOL(ieee80211_wx_get_wap);
EXPORT_SYMBOL(ieee80211_wx_set_mode);
EXPORT_SYMBOL(ieee80211_wx_get_mode);
EXPORT_SYMBOL(ieee80211_wx_set_scan);
EXPORT_SYMBOL(ieee80211_wx_get_freq);
EXPORT_SYMBOL(ieee80211_wx_set_freq);
EXPORT_SYMBOL(ieee80211_wx_set_rawtx);
EXPORT_SYMBOL(ieee80211_wx_get_name);
EXPORT_SYMBOL(ieee80211_wx_set_power);
EXPORT_SYMBOL(ieee80211_wx_get_power);
EXPORT_SYMBOL(ieee80211_wlan_frequencies);
EXPORT_SYMBOL(ieee80211_wx_set_rts);
EXPORT_SYMBOL(ieee80211_wx_get_rts);