On Wed, Jan 25, 2017 at 5:56 PM, Olivier Soldano <[email protected]> wrote: > Hello Nikos, > > Thanks for your answer, first let me apologize for the typos, > yes I meant DEFAULT_PADDING_SIZE and the effective packet size is 484 with a > specified data size of 444. > > The output of gnutls_record_overhead_size is 37 which is off by 3. > However 37 seams to be correct as the sessions sends DTLS packets > (DTLS_RECORD_HEADER_SIZE = 13) and is cyphered using AES-256-GCM > with AEAD MAC (24 bytes of overhead) which is indeed 37 bytes. > Maybe it is linked to : response = gnutls_malloc(1 + 2 + data_size + > DEFAULT_PADDING_SIZE) in heartbeat_send_data ?
Right these are a header to the payload. So the number of data transmitted by this function should be: MAX(16, payload_size)+gnutls_record_overhead_size()+3. I'll document that in gnutls_heartbeat_ping(). regards, Nikos _______________________________________________ Gnutls-help mailing list [email protected] http://lists.gnupg.org/mailman/listinfo/gnutls-help
