2016-02-29 14:10 GMT+01:00 Andrew Svetlov <[email protected]>:
> IIRC latest asyncio uses BIO (not socket wrapper) for SSL processing,
> so it does never block.
What about Python 3.4 which doesn't support BIO? Do you think that the
SSL/TLS handshake can block? We use it in asynchronous mode, no?
_SelectorSslTransport:
...
sslsock = sslcontext.wrap_socket(rawsock, do_handshake_on_connect=False, ...)
...
The socket is in non-blocking mode, no?
In the C code, _ssl__SSLSocket_do_handshake_impl():
nonblocking = (sock->sock_timeout >= 0);
BIO_set_nbio(SSL_get_rbio(self->ssl), nonblocking);
BIO_set_nbio(SSL_get_wbio(self->ssl), nonblocking);
...
ret = SSL_do_handshake(self->ssl);
...
} else if (sockstate == SOCKET_IS_NONBLOCKING) {
break;
Victor
