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AP: Determine Short SSID value for the BSS

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This can be used in the future to implement support for RNR and scanning
extensions using a shorter field for the SSID.

Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
This commit is contained in:
Andrei Otcheretianski 2019-06-19 15:49:15 +03:00 • committed by Jouni Malinen
parent 41b06b065e
commit 522450b7b1
6 changed files with 12 additions and 0 deletions
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1
src/ap/ap_config.h
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@ -88,6 +88,7 @@ typedef enum hostap_security_policy {
struct hostapd_ssid {
u8 ssid[SSID_MAX_LEN];
size_t ssid_len;
u32 short_ssid;
unsigned int ssid_set:1;
unsigned int utf8_ssid:1;
unsigned int wpa_passphrase_set:1;

7
src/ap/hostapd.c
View file

@ -13,6 +13,7 @@
#include "utils/common.h"
#include "utils/eloop.h"
#include "utils/crc32.h"
#include "common/ieee802_11_defs.h"
#include "common/wpa_ctrl.h"
#include "common/hw_features_common.h"
@ -1190,6 +1191,12 @@ static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
}
/*
* Short SSID calculation is identical to FCS and it is defined in
* IEEE P802.11-REVmd/D3.0, 9.4.2.170.3 (Calculating the Short-SSID).
*/
conf->ssid.short_ssid = crc32(conf->ssid.ssid, conf->ssid.ssid_len);
if (!hostapd_drv_none(hapd)) {
wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
" and ssid \"%s\"",