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Add test option for specifying hardcoded BSS Load element

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The new bss_load_test parameter can be used to configure hostapd to
advertise a fixed BSS Load element in Beacon and Probe Response frames
for testing purposes. This functionality is disabled in the build by
default and can be enabled with CONFIG_TESTING_OPTIONS=y.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Jouni Malinen 2013-08-06 18:23:22 +03:00 committed by Jouni Malinen
parent 9c7e43a5c6
commit 9bc33868bf
4 changed files with 51 additions and 0 deletions
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19
hostapd/config_file.c
View File

@ -3002,6 +3002,25 @@ static int hostapd_config_fill(struct hostapd_config *conf,
PARSE_TEST_PROBABILITY(ignore_assoc_probability)
PARSE_TEST_PROBABILITY(ignore_reassoc_probability)
PARSE_TEST_PROBABILITY(corrupt_gtk_rekey_mic_probability)
} else if (os_strcmp(buf, "bss_load_test") == 0) {
WPA_PUT_LE16(bss->bss_load_test, atoi(pos));
pos = os_strchr(pos, ':');
if (pos == NULL) {
wpa_printf(MSG_ERROR, "Line %d: Invalid "
"bss_load_test", line);
return 1;
}
pos++;
bss->bss_load_test[2] = atoi(pos);
pos = os_strchr(pos, ':');
if (pos == NULL) {
wpa_printf(MSG_ERROR, "Line %d: Invalid "
"bss_load_test", line);
return 1;
}
pos++;
WPA_PUT_LE16(&bss->bss_load_test[3], atoi(pos));
bss->bss_load_test_set = 1;
#endif /* CONFIG_TESTING_OPTIONS */
} else if (os_strcmp(buf, "vendor_elements") == 0) {
struct wpabuf *elems;

6
hostapd/hostapd.conf
View File

@ -416,6 +416,12 @@ wmm_ac_vo_acm=0
# associated stations in the BSS. By default, this bridging is allowed.
#ap_isolate=1
# Fixed BSS Load value for testing purposes
# This field can be used to configure hostapd to add a fixed BSS Load element
# into Beacon and Probe Response frames for testing purposes. The format is
# <station count>:<channel utilization>:<available admission capacity>
#bss_load_test=12:80:20000
##### IEEE 802.11n related configuration ######################################
# ieee80211n: Whether IEEE 802.11n (HT) is enabled

5
src/ap/ap_config.h
View File

@ -467,6 +467,11 @@ struct hostapd_bss_config {
unsigned int sae_anti_clogging_threshold;
int *sae_groups;
#ifdef CONFIG_TESTING_OPTIONS
u8 bss_load_test[5];
u8 bss_load_test_set;
#endif /* CONFIG_TESTING_OPTIONS */
};

21
src/ap/beacon.c
View File

@ -38,6 +38,22 @@
#ifdef NEED_AP_MLME
static u8 * hostapd_eid_bss_load(struct hostapd_data *hapd, u8 *eid, size_t len)
{
#ifdef CONFIG_TESTING_OPTIONS
if (hapd->conf->bss_load_test_set) {
if (2 + 5 > len)
return eid;
*eid++ = WLAN_EID_BSS_LOAD;
*eid++ = 5;
os_memcpy(eid, hapd->conf->bss_load_test, 5);
eid += 5;
}
#endif /* CONFIG_TESTING_OPTIONS */
return eid;
}
static u8 ieee802_11_erp_info(struct hostapd_data *hapd)
{
u8 erp = 0;
@ -251,6 +267,8 @@ static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
/* RSN, MDIE, WPA */
pos = hostapd_eid_wpa(hapd, pos, epos - pos);
pos = hostapd_eid_bss_load(hapd, pos, epos - pos);
#ifdef CONFIG_IEEE80211N
pos = hostapd_eid_ht_capabilities(hapd, pos);
pos = hostapd_eid_ht_operation(hapd, pos);
@ -662,6 +680,9 @@ void ieee802_11_set_beacon(struct hostapd_data *hapd)
tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE -
tailpos);
tailpos = hostapd_eid_bss_load(hapd, tailpos,
tail + BEACON_TAIL_BUF_SIZE - tailpos);
#ifdef CONFIG_IEEE80211N
tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
tailpos = hostapd_eid_ht_operation(hapd, tailpos);