Some application code using asio::ssl::stream<> explicitly tests for the
SSL_R_SHORT_READ error. For compatibility, when using older versions of
OpenSSL we will define the ssl::error::stream_truncated to use this
value.
When using epoll, interpret a short read or write on a stream-oriented
socket as an indication that we should wait for a readiness event. After
this condition, speculative operations are disabled until we receive the
event notification from epoll.
The getaddrinfo function is now used by default unless Mac OS X 10.4 or
earlier is detected. Its use may also be explicitly disabled by defining
ASIO_DISABLE_GETADDRINFO.
The public interface is now specified in terms of buffer sequences. The
optimised overloads for const_buffer, mutable_buffer, etc. are now
implementation details.
The epoll_reactor now supports the use of regular file descriptors with
posix::stream_descriptor, provided the I/O operations on them never fail
with EAGAIN or EWOULDBLOCK. If the descriptor cannot be added to the
epoll set using epoll_ctl, and errno is EPERM (indicating an unsupported
descriptor type), then no error condition is raised. Instead, any
operation which would require a trip through the reactor will fail.
The consuming_buffers template, which is used internally by the composed
read and write operations, did not correctly satisfy the buffer sequence
requirements as its iterator was not bidirectional. Rather than acting
as a proxy buffer sequence, the reworked consuming_buffers template
instead produces fixed-size buffer sequences as required.
- SSLv2 has been completely removed from OpenSSL, even without OPENSSL_NO_SSL2
- there is a new threading API without locking callbacks
- struct SSL_CTX has been made opaque and must be used via accessor functions
- some cleanup functions have been removed
The buffer sequence requirements are now defined in terms of new functions
buffer_sequence_begin() and buffer_sequence_end(). As a result, the
mutable_buffer and const_buffer classes satisfy the buffer sequence
requirements. The mutable_buffers_1 and const_buffers_1 classes have been
deprecated.
