sme: Try all authentication algorithms when the first one fails

When passing several authentication algorithms through auth_alg, we
should try all of them when the first one fails. The wext driver goes
through the connect nl80211 command and the retries are then handled by
the kernel. The nl80211 doesn't and we have to handle that from
userspace.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

src/drivers/driver_nl80211.c

@@ -2513,10 +2513,6 @@ retry:
 	wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
 	if (params->ie)
 		NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
-	/*
-	 * TODO: if multiple auth_alg options enabled, try them one by one if
-	 * the AP rejects authentication due to unknown auth alg
-	 */
 	if (params->auth_alg & WPA_AUTH_ALG_OPEN)
 		type = NL80211_AUTHTYPE_OPEN_SYSTEM;
 	else if (params->auth_alg & WPA_AUTH_ALG_SHARED)

wpa_supplicant/sme.c

@@ -274,7 +274,33 @@ void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
 	if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
 		wpa_printf(MSG_DEBUG, "SME: Authentication failed (status "
 			   "code %d)", data->auth.status_code);
-		return;
+
+		if (data->auth.status_code !=
+		    WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
+		    wpa_s->sme.auth_alg == data->auth.auth_type ||
+		    wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP)
+			return;
+
+		switch (data->auth.auth_type) {
+		case WLAN_AUTH_OPEN:
+			wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
+
+			wpa_printf(MSG_DEBUG, "SME: Trying SHARED auth");
+			wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
+						 wpa_s->current_ssid);
+			return;
+
+		case WLAN_AUTH_SHARED_KEY:
+			wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
+
+			wpa_printf(MSG_DEBUG, "SME: Trying LEAP auth");
+			wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
+						 wpa_s->current_ssid);
+			return;
+
+		default:
+			return;
+		}
 	}
 
 #ifdef CONFIG_IEEE80211R