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IEEE 802.11w: Use comeback duration to delay association

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This commit is contained in:
Jouni Malinen 2008-09-01 11:48:43 +03:00
parent c684525947
commit 6572fc0d1b
1 changed files with 28 additions and 6 deletions
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34
wpa_supplicant/mlme.c
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@ -129,6 +129,8 @@ struct ieee802_11_elems {
u8 mdie_len;
u8 *ftie;
u8 ftie_len;
u8 *assoc_comeback;
u8 assoc_comeback_len;
};
typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes;
@ -231,6 +233,10 @@ static ParseRes ieee802_11_parse_elems(u8 *start, size_t len,
elems->ftie = pos;
elems->ftie_len = elen;
break;
case WLAN_EID_ASSOC_COMEBACK_TIME:
elems->assoc_comeback = pos;
elems->assoc_comeback_len = elen;
break;
default:
#if 0
wpa_printf(MSG_MSGDUMP "MLME: IEEE 802.11 element "
@ -1231,12 +1237,6 @@ static void ieee80211_rx_mgmt_assoc_resp(struct wpa_supplicant *wpa_s,
reassoc ? "Rea" : "A", MAC2STR(mgmt->sa),
capab_info, status_code, aid);
if (status_code != WLAN_STATUS_SUCCESS) {
wpa_printf(MSG_DEBUG, "MLME: AP denied association (code=%d)",
status_code);
return;
}
pos = mgmt->u.assoc_resp.variable;
if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
== ParseFailed) {
@ -1244,6 +1244,28 @@ static void ieee80211_rx_mgmt_assoc_resp(struct wpa_supplicant *wpa_s,
return;
}
if (status_code != WLAN_STATUS_SUCCESS) {
wpa_printf(MSG_DEBUG, "MLME: AP denied association (code=%d)",
status_code);
#ifdef CONFIG_IEEE80211W
if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
elems.assoc_comeback && elems.assoc_comeback_len == 4) {
u32 tu, ms;
tu = WPA_GET_LE32(elems.assoc_comeback);
ms = tu * 1024 / 1000;
wpa_printf(MSG_DEBUG, "MLME: AP rejected association "
"temporarily; comeback duration %u TU "
"(%u ms)", tu, ms);
if (ms > IEEE80211_ASSOC_TIMEOUT) {
wpa_printf(MSG_DEBUG, "MLME: Update timer "
"based on comeback duration");
ieee80211_reschedule_timer(wpa_s, ms);
}
}
#endif /* CONFIG_IEEE80211W */
return;
}
if (elems.supp_rates == NULL) {
wpa_printf(MSG_DEBUG, "MLME: no SuppRates element in "
"AssocResp");