SSL_write problem

[Nikos Balkanas]

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