On Tue, May 19, 2020, Matt Caswell wrote: > > SSL_accept:error in TLSv1.3 early data > This comes from this code in the info callback which you lifted from s_cb.c: > Please could you modify this as follows: > + ERR_print_errors(bio_err); That's basically already in the code: while ((l = ERR_get_error_line_data((const char **) &file, &line, (const char **) &data, &flags)) != 0) log it ... but that does not generate any output. Even if I add the line you suggested there's no extra output (to make sure there would be something I also added an BIO_fprintf() and that output is shown, so it's not a problem with the BIO). I guess I have to figure out how to use wireshark for this.