[gnutls-devel] GnuTLS | ext/record_size_limit: distinguish sending and receiving limits (!985)

Development of GNU's TLS library gnutls-devel at lists.gnutls.org
Fri Apr 26 17:59:34 CEST 2019

Daiki Ueno commented on a discussion on lib/ext/max_record.c: https://gitlab.com/gnutls/gnutls/merge_requests/985#note_164709605

>  	/* this function sends the client extension data (dnsname) */
>  	if (session->security_parameters.entity == GNUTLS_CLIENT) {
> -		if (session->security_parameters.max_record_send_size !=
> +		/* this extension requires that both sending and
> +		 * receiving limits are the same */

@tomato42 maybe I don't understand what you mean, but my understanding is that if max_fragment_length is negotiated, the limit applies to both sending and receiving.

The below condition is basically to check a programmer error, where the programmer sets the limit with the new asymmetric API `gnutls_record_set_max_recv_size()` instead of the old API `gnutls_record_set_max_size()`.

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