tls_connection_client_hello_ext() function

tls_connection_client_hello_ext - Set TLS extension for ClientHello @tls_ctx: TLS context data from tls_init() @conn: Connection context data from tls_connection_init() @ext_type: Extension type @data: Extension payload (%NULL to remove extension) @data_len: Extension payload length Returns: 0 on success, -1 on failure