/**
* Calculates a unique transaction id from given arguments @p peer and
* @p pdu. The id is returned in @p id.
- *
+ *
* @param peer The remote party who sent @p pdu.
* @param pdu The message that initiated the transaction.
* @param id Set to the new id.
* @code
coap_opt_filter_t f = COAP_OPT_NONE;
coap_opt_iterator_t opt_iter;
-
+
if (coap_option_check_critical(ctx, pdu, f) == 0) {
coap_option_iterator_init(pdu, &opt_iter, f);