=head1 DESCRIPTION
+The functionality provided by the servername callback is superseded by
+the early callback, which can be set using SSL_CTX_set_early_cb().
+The servername callback is retained for historical compatibility.
+
SSL_CTX_set_tlsext_servername_callback() sets the application callback B<cb>
used by a server to perform any actions or configuration required based on
the servername extension received in the incoming connection. When B<cb>
=head1 NOTES
-The ALPN and SNI callbacks are both executed during Client Hello processing.
-The servername callback is executed first, followed by the ALPN callback.
+Several callbacks are executed during ClientHello processing, including
+the early, ALPN, and servername callbacks. The early callback is executed
+first, then the servername callback, followed by the ALPN callback.
=head1 RETURN VALUES
=head1 SEE ALSO
L<ssl(7)>, L<SSL_CTX_set_alpn_select_cb(3)>,
-L<SSL_get0_alpn_selected(3)>
+L<SSL_get0_alpn_selected(3)>, L<SSL_CTX_set_early_cb(3)>
=head1 COPYRIGHT