EMalenfant@interstarinc.com wrote:
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.
The symptoms in that bug report do sound similar based on what Scott and Viktor have said. Scott, you might try this change to see if it makes a difference: --- include/asio/ssl/detail/openssl_stream_service.hpp 16 Jun 2006 11:52:28 -0000 1.11 +++ include/asio/ssl/detail/openssl_stream_service.hpp 14 Jul 2006 12:28:36 -0000 @@ -179,6 +179,7 @@ impl = new impl_struct; impl->ssl = ::SSL_new(context.impl()); ::SSL_set_mode(impl->ssl, SSL_MODE_ENABLE_PARTIAL_WRITE); + ::SSL_set_mode(impl->ssl, SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER); ::BIO* int_bio = 0; impl->ext_bio = 0; ::BIO_new_bio_pair(&int_bio, 8192, &impl->ext_bio, 8192); However I'm not particularly optimistic that it's the same problem, since SSL_MODE_ENABLE_PARTIAL_WRITE is already set and from my reading of the code, the same buffer is reused until all data is sent (so in theory SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER is not needed). Cheers, Chris