barker preamble bit in ERP IE

[ronit fichman]

hi

as write in the standart

When there are no NonERP STAs associated with the BSS and the ERP
Information Element sender.s

dot11ShortPreambleOptionImplemented MIB variable is set to true, then the
Barker_Preamble_Mode bit

may be set to 0. *The Barker_Preamble_Mode bit shall be set to 1 by the ERP
Information Element sender if*

*one or more associated NonERP STAs are not short preamble capable as
indicated in their Capability Information*

*field, or if the ERP Information Element senders
dot11ShortPreambleOptionImplemented MIB*

*variable is set to false*



in beacon.c :

static u8 ieee802_11_erp_info(struct hostapd_data *hapd)
{
 u8 erp = 0;

 if (hapd->iface->current_mode == NULL ||
     hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
  return 0;

 switch (hapd->iconf->cts_protection_type) {
 case CTS_PROTECTION_FORCE_ENABLED:
  erp |= ERP_INFO_NON_ERP_PRESENT | ERP_INFO_USE_PROTECTION;
  break;
 case CTS_PROTECTION_FORCE_DISABLED:
  erp = 0;
  break;
 case CTS_PROTECTION_AUTOMATIC:
  if (hapd->iface->olbc)
   erp |= ERP_INFO_USE_PROTECTION;
  /* continue */
 case CTS_PROTECTION_AUTOMATIC_NO_OLBC:
  if (hapd->iface->num_sta_non_erp > 0) {
   erp |= ERP_INFO_NON_ERP_PRESENT |
    ERP_INFO_USE_PROTECTION;
  }
  break;
 }
* if (hapd->iface->num_sta_no_short_preamble > 0)
  erp |= ERP_INFO_BARKER_PREAMBLE_MODE;*

 return erp;
}

don't we need to sign barker bit also is th hostapd configure to long
preamble ?

if not the hostapd set this bit just in case not short preamble station is
associated



thank

Ronit
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