for the time being assume a single request/response exchange for a given EAP method

src/libcharon/plugins/eap_ttls/eap_ttls_peer.c

@@ -147,10 +147,11 @@ METHOD(tls_application_t, process, status_t,
 	switch (status)
 	{
 		case SUCCESS:
-			this->method->destroy(this->method);
-			this->method = NULL;
 			/* fall through to NEED_MORE since response must be sent */
 		case NEED_MORE:
+			/* TODO support multiple EAP request/response exchanges */
+			this->method->destroy(this->method);
+			this->method = NULL;
 			return NEED_MORE;
 		case FAILED:
 		default: