Re: [boost] [asio] has anybody enabled SSL in a large project?

From: EMalenfant_at_[hidden]
Date: 2006-07-13 15:52:50

From: viktor kougitko [mailto:klug_at_[hidden]] 
> 
> From: "Scott" <cheesy4poofs_at_[hidden]>
> 
[snip]
> > It all seemed great at first, because it seemed to 
> > seemlessly work.  
> > But eventually the communications break down.  I either get 
> >asserts in 
> > my code from unexpected data in the stream, or the client hangs 
> > waiting for data that never appears or any of several 
> >different stream 
> > problems.  It's rarely the exact same thing.  But it 
> >eventually always 
> > fails.  Especially on long sustained transfers.
> >
> 
> it seems that problem with buffer sizes try to change 
> asio/ssl/detail/openssl_stream_service.hpp
> openssl_stream_service::create
> ::BIO_new_bio_pair(&int_bio, 3*8192, &impl->ext_bio, 3*8192); 
> it helps in my case
> 

I know next to nothing about asio's SSL implementation, but this reference
to buffer sizes reminds me of a problem that we saw in a previous version of
TAO: http://deuce.doc.wustl.edu/bugzilla/show_bug.cgi?id=1429

The fix in that case was to enable partial writes in open ssl, using
SSL_set_mode to enable                SSL_MODE_ENABLE_PARTIAL_WRITE and
SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER.

HTH,

Éric