=head1 NAME
-SSL_connect - Initiate the TLS handshake with an TLS server
+SSL_connect - initiate the TLS/SSL handshake with an TLS/SSL server
=head1 SYNOPSIS
=head1 DESCRIPTION
-SSL_connect() initiates the TLS handshake with a server. The communication
+SSL_connect() initiates the TLS/SSL handshake with a server. The communication
channel must already have been set and assigned to the B<ssl> by setting an
-underlying B<BIO>. The behaviour of SSL_connect() depends on the underlying
-BIO.
+underlying B<BIO>.
-If the underlying BIO is B<blocking>, SSL_connect() will only return, once the
-handshake has been finished or an error occured.
+=head1 NOTES
-If the underlying BIO is B<non-blocking>, SSL_connect() will also return,
+The behaviour of SSL_connect() depends on the underlying BIO.
+
+If the underlying BIO is B<blocking>, SSL_connect() will only return once the
+handshake has been finished or an error occurred.
+
+If the underlying BIO is B<non-blocking>, SSL_connect() will also return
when the underlying BIO could not satisfy the needs of SSL_connect()
-to continue the handshake. In this case a call to SSL_get_error() with the
-return value of SSL_connect() will yield SSL_ERROR_WANT_READ or
-SSL_ERROR_WANT_WRITE. The calling process then must repeat the call after
+to continue the handshake, indicating the problem by the return value -1.
+In this case a call to SSL_get_error() with the
+return value of SSL_connect() will yield B<SSL_ERROR_WANT_READ> or
+B<SSL_ERROR_WANT_WRITE>. The calling process then must repeat the call after
taking appropriate action to satisfy the needs of SSL_connect().
The action depends on the underlying BIO. When using a non-blocking socket,
nothing is to be done, but select() can be used to check for the required
=over 4
-=item 1
+=item Z<>0
-The TLS handshake was successfully completed, a TLS connection has been
-established.
+The TLS/SSL handshake was not successful but was shut down controlled and
+by the specifications of the TLS/SSL protocol. Call SSL_get_error() with the
+return value B<ret> to find out the reason.
-=item 0
+=item Z<>1
-The TLS handshake was not successfull but was shut down controlled and
-by the specifications of the TLS protocol. Call SSL_get_error() with the
-return value B<ret> to find out the reason.
+The TLS/SSL handshake was successfully completed, a TLS/SSL connection has been
+established.
-=item -1
+=item E<lt>0
-The TLS handshake was not successfull, because a fatal error occured either
-at the protocol level or a connection failure occured. The shutdown was
-not clean. It can also occure of action is need to continue the operation
+The TLS/SSL handshake was not successful, because a fatal error occurred either
+at the protocol level or a connection failure occurred. The shutdown was
+not clean. It can also occur of action is need to continue the operation
for non-blocking BIOs. Call SSL_get_error() with the return value B<ret>
to find out the reason.
=head1 SEE ALSO
L<SSL_get_error(3)|SSL_get_error(3)>, L<SSL_accept(3)|SSL_accept(3)>,
-L<SSL_shutdown(3)|SSL_shutdown(3)>, L<ssl(3)|ssl(3)> , L<bio(3)|bio(3)>
+L<SSL_shutdown(3)|SSL_shutdown(3)>, L<ssl(3)|ssl(3)>, L<bio(3)|bio(3)>,
+L<SSL_set_connect_state(3)|SSL_set_connect_state(3)>,
+L<SSL_do_handshake(3)|SSL_do_handshake(3)>,
+L<SSL_CTX_new(3)|SSL_CTX_new(3)>
=cut