DPP: Indicate authentication success on ConfReqRX if needed (hostapd)

It is possible to receive the Configuration Request frame before having
seen TX status for the Authentication Confirm. In that sequence, the
DPP-AUTH-SUCCESS event would not be indicated before processing the
configuration step and that could confuse upper layers that follow the
details of the DPP exchange. As a workaround, indicate DPP-AUTH-SUCCESS
when receiving the Configuration Request since the Enrollee/Responser
has clearly receive the Authentication Confirm even if the TX status for
it has not been received.

This was already done in wpa_supplicant in commit 422e73d623 ("DPP:
Indicate authentication success on ConfReqRX if needed") and matching
changes are now added to hostapd.

Signed-off-by: Jouni Malinen <j@w1.fi>

src/ap/dpp_hostapd.c

@@ -1982,6 +1982,19 @@ hostapd_dpp_gas_req_handler(struct hostapd_data *hapd, const u8 *sa,
 		wpa_printf(MSG_DEBUG, "DPP: No matching exchange in progress");
 		return NULL;
 	}
+
+	if (hapd->dpp_auth_ok_on_ack && auth->configurator) {
+		wpa_printf(MSG_DEBUG,
+			   "DPP: Have not received ACK for Auth Confirm yet - assume it was received based on this GAS request");
+		/* hostapd_dpp_auth_success() would normally have been called
+		 * from TX status handler, but since there was no such handler
+		 * call yet, simply send out the event message and proceed with
+		 * exchange. */
+		wpa_msg(hapd->msg_ctx, MSG_INFO,
+			DPP_EVENT_AUTH_SUCCESS "init=1");
+		hapd->dpp_auth_ok_on_ack = 0;
+	}
+
 	wpa_hexdump(MSG_DEBUG,
 		    "DPP: Received Configuration Request (GAS Query Request)",
 		    query, query_len);