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OCE: Add RSSI based association rejection support (AP)

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An AP might reject a STA association request due to low RSSI. In such
case, the AP informs the STA the desired RSSI improvement and a retry
timeout. The STA might retry to associate even if the RSSI hasn't
improved if the retry timeout expired.

Signed-off-by: Beni Lev <beni.lev@intel.com>
This commit is contained in:
Beni Lev 2017-08-21 19:43:53 +03:00 • committed by Jouni Malinen
parent 19677b77c3
commit 076f1ea1d9
7 changed files with 66 additions and 6 deletions
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28
src/ap/ieee802_11.c
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@ -2976,7 +2976,7 @@ static int add_associated_sta(struct hostapd_data *hapd,
static u16 send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta,
const u8 *addr, u16 status_code, int reassoc,
const u8 *ies, size_t ies_len)
const u8 *ies, size_t ies_len, int rssi)
{
int send_len;
u8 *buf;
@ -3021,6 +3021,16 @@ static u16 send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta,
/* Extended supported rates */
p = hostapd_eid_ext_supp_rates(hapd, p);
#ifdef CONFIG_MBO
if (status_code == WLAN_STATUS_DENIED_POOR_CHANNEL_CONDITIONS &&
rssi != 0) {
int delta = hapd->iconf->rssi_reject_assoc_rssi - rssi;
p = hostapd_eid_mbo_rssi_assoc_rej(hapd, p, buf + buflen - p,
delta);
}
#endif /* CONFIG_MBO */
#ifdef CONFIG_IEEE80211R_AP
if (sta && status_code == WLAN_STATUS_SUCCESS) {
/* IEEE 802.11r: Mobility Domain Information, Fast BSS
@ -3292,7 +3302,7 @@ void fils_hlp_finish_assoc(struct hostapd_data *hapd, struct sta_info *sta)
reply_res = send_assoc_resp(hapd, sta, sta->addr, WLAN_STATUS_SUCCESS,
sta->fils_pending_assoc_is_reassoc,
sta->fils_pending_assoc_req,
sta->fils_pending_assoc_req_len);
sta->fils_pending_assoc_req_len, 0);
os_free(sta->fils_pending_assoc_req);
sta->fils_pending_assoc_req = NULL;
sta->fils_pending_assoc_req_len = 0;
@ -3329,7 +3339,7 @@ void fils_hlp_timeout(void *eloop_ctx, void *eloop_data)
static void handle_assoc(struct hostapd_data *hapd,
const struct ieee80211_mgmt *mgmt, size_t len,
int reassoc)
int reassoc, int rssi)
{
u16 capab_info, listen_interval, seq_ctrl, fc;
u16 resp = WLAN_STATUS_SUCCESS, reply_res;
@ -3512,6 +3522,12 @@ static void handle_assoc(struct hostapd_data *hapd,
resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
goto fail;
}
if (hapd->iconf->rssi_reject_assoc_rssi && rssi &&
rssi < hapd->iconf->rssi_reject_assoc_rssi) {
resp = WLAN_STATUS_DENIED_POOR_CHANNEL_CONDITIONS;
goto fail;
}
#endif /* CONFIG_MBO */
/*
@ -3710,7 +3726,7 @@ static void handle_assoc(struct hostapd_data *hapd,
#endif /* CONFIG_FILS */
reply_res = send_assoc_resp(hapd, sta, mgmt->sa, resp, reassoc, pos,
left);
left, rssi);
os_free(tmp);
/*
@ -4155,12 +4171,12 @@ int ieee802_11_mgmt(struct hostapd_data *hapd, const u8 *buf, size_t len,
break;
case WLAN_FC_STYPE_ASSOC_REQ:
wpa_printf(MSG_DEBUG, "mgmt::assoc_req");
handle_assoc(hapd, mgmt, len, 0);
handle_assoc(hapd, mgmt, len, 0, ssi_signal);
ret = 1;
break;
case WLAN_FC_STYPE_REASSOC_REQ:
wpa_printf(MSG_DEBUG, "mgmt::reassoc_req");
handle_assoc(hapd, mgmt, len, 1);
handle_assoc(hapd, mgmt, len, 1, ssi_signal);
ret = 1;
break;
case WLAN_FC_STYPE_DISASSOC: