SSL_CTX_set_mode(ssl, SSL_MODE_AUTO_RETRY);
2009/3/30 Nikos Balkanas <nbalka...@gmail.com>:
> Hi,
>
> I would like to ideally use non-blocking SSL_read and blocking SSL_write. Is
> this possible with BIO_set_nbio? What should the underlying socket be in
> that case?
>
> If this is not possible, as I suspect, i have the problem that the
> non-blocking SSL_write with select, will stall after first SSL_error of
> SSL_ERROR_WANT_READ || SSL_ERROR_WANT_WRITE without ever writing the data:
>
> while(((select(fd + 1, NULL, &rset, NULL, &alarm)) > 0) && FD_ISSET(fd,
> &rset))
> {
> res = SSL_write(ssl, input, len);
> if (res == -1)
> {
> SSL_error = SSL_get_error(ssl, res);
> printf("SSL_error = %d\n", SSL_error);
> if (SSL_error != SSL_ERROR_WANT_READ && SSL_error !=
> SSL_ERROR_WANT_WRITE)
> return(-1);
> else FD_CLR(fd, &rset);
> }
> else return(res);
> }
>
> My only solution so far has been to use the non-blocking SSL_write as a
> blocking one, but it is terribly inefficient, looping as many as 50
> times before writing the data:
>
> while((ret = SSL_write(ssl, request->data, request->len)) < 0)
> {
> SSL_error = SSL_get_error(ssl, ret);
> if (SSL_error != SSL_ERROR_WANT_READ && SSL_error !=
> SSL_ERROR_WANT_WRITE)
> break;
> thr_yield();
> }
>
> Any ideas?
> TIA, Nikos
>
>
