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WPS: Wait for EAPOL-Start unless WPS 2.0 station as workaround

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Extend the code that waits for the station to send EAPOL-Start before
initiating EAPOL authenticator operations to cover the case where the
station includes WPS IE in (Re)Association Request frame if that IE
does not include support for WPS 2.0. While this should not really
be needed, this may help with some deployed WPS 1.0 stations that do
not support EAPOL operations correctly and may get confused of the
EAP-Request/Identity packets that would show up twice if EAPOL-Start
is transmitted.
This commit is contained in:
Jouni Malinen 2011-08-28 19:16:59 +03:00
parent fb91db5639
commit 17f6b90056
7 changed files with 68 additions and 17 deletions
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35
src/ap/ieee802_1x.c
View file

@ -752,14 +752,24 @@ void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
return;
#ifdef CONFIG_WPS
if (!hapd->conf->ieee802_1x &&
((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
WLAN_STA_MAYBE_WPS)) {
/*
* Delay EAPOL frame transmission until a possible WPS
* STA initiates the handshake with EAPOL-Start.
*/
sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
if (!hapd->conf->ieee802_1x) {
u32 wflags = sta->flags & (WLAN_STA_WPS |
WLAN_STA_WPS2 |
WLAN_STA_MAYBE_WPS);
if (wflags == WLAN_STA_MAYBE_WPS ||
wflags == (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) {
/*
* Delay EAPOL frame transmission until a
* possible WPS STA initiates the handshake
* with EAPOL-Start. Only allow the wait to be
* skipped if the STA is known to support WPS
* 2.0.
*/
wpa_printf(MSG_DEBUG, "WPS: Do not start "
"EAPOL until EAPOL-Start is "
"received");
sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
}
}
#endif /* CONFIG_WPS */
@ -888,11 +898,14 @@ void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
#ifdef CONFIG_WPS
sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
if (!hapd->conf->ieee802_1x && !(sta->flags & WLAN_STA_WPS)) {
if (!hapd->conf->ieee802_1x && !(sta->flags & WLAN_STA_WPS2)) {
/*
* Delay EAPOL frame transmission until a possible WPS
* initiates the handshake with EAPOL-Start.
* Delay EAPOL frame transmission until a possible WPS STA
* initiates the handshake with EAPOL-Start. Only allow the
* wait to be skipped if the STA is known to support WPS 2.0.
*/
wpa_printf(MSG_DEBUG, "WPS: Do not start EAPOL until "
"EAPOL-Start is received");
sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
}
#endif /* CONFIG_WPS */