SSL_set_shutdown(3) OpenSSL SSL_set_shutdown(3) NNAAMMEE SSL_set_shutdown, SSL_get_shutdown - manipulate shutdown state of an SSL connection SSYYNNOOPPSSIISS #include void SSL_set_shutdown(SSL *ssl, int mode); int SSL_get_shutdown(const SSL *ssl); DDEESSCCRRIIPPTTIIOONN _S_S_L___s_e_t___s_h_u_t_d_o_w_n_(_) sets the shutdown state of ssssll to mmooddee. _S_S_L___g_e_t___s_h_u_t_d_o_w_n_(_) returns the shutdown mode of ssssll. NNOOTTEESS The shutdown state of an ssl connection is a bitmask of: 0 No shutdown setting, yet. SSL_SENT_SHUTDOWN A "close notify" shutdown alert was sent to the peer, the connec- tion is being considered closed and the session is closed and cor- rect. SSL_RECEIVED_SHUTDOWN A shutdown alert was received form the peer, either a normal "close notify" or a fatal error. SSL_SENT_SHUTDOWN and SSL_RECEIVED_SHUTDOWN can be set at the same time. The shutdown state of the connection is used to determine the state of the ssl session. If the session is still open, when _S_S_L___c_l_e_a_r(3) or _S_S_L___f_r_e_e(3) is called, it is considered bad and removed according to RFC2246. The actual condition for a correctly closed session is SSL_SENT_SHUTDOWN (according to the TLS RFC, it is acceptable to only send the "close notify" alert but to not wait for the peer's answer, when the underlying connection is closed). _S_S_L___s_e_t___s_h_u_t_d_o_w_n_(_) can be used to set this state without sending a close alert to the peer (see _S_S_L___s_h_u_t_d_o_w_n(3)). If a "close notify" was received, SSL_RECEIVED_SHUTDOWN will be set, for setting SSL_SENT_SHUTDOWN the application must however still call _S_S_L___s_h_u_t_d_o_w_n(3) or _S_S_L___s_e_t___s_h_u_t_d_o_w_n_(_) itself. RREETTUURRNN VVAALLUUEESS _S_S_L___s_e_t___s_h_u_t_d_o_w_n_(_) does not return diagnostic information. _S_S_L___g_e_t___s_h_u_t_d_o_w_n_(_) returns the current setting. SSEEEE AALLSSOO _s_s_l(3), _S_S_L___s_h_u_t_d_o_w_n(3), _S_S_L___C_T_X___s_e_t___q_u_i_e_t___s_h_u_t_d_o_w_n(3), _S_S_L___c_l_e_a_r(3), _S_S_L___f_r_e_e(3) 1.0.1u 2016-09-22 SSL_set_shutdown(3)