SSL_clear 3 2002-06-09 0.9.9-dev OpenSSL

NAME

SSL_clear - reset SSL object to allow another connection

LIBRARY

libcrypto, -lcrypto

SYNOPSIS


 #include 


 int SSL_clear(SSL *ssl);

DESCRIPTION

Reset ssssll to allow another connection. All settings (method, ciphers, BIOs) are kept.

NOTES

SSL_clear is used to prepare an SSL object for a new connection. While all settings are kept, a side effect is the handling of the current SSL session. If a session is still ooppeenn, it is considered bad and will be removed from the session cache, as required by RFC2246. A session is considered open, if _S_S_L___s_h_u_t_d_o_w_n(3) was not called for the connection or at least _S_S_L___s_e_t___s_h_u_t_d_o_w_n(3) was used to set the SSL_SENT_SHUTDOWN state.

If a session was closed cleanly, the session object will be kept and all settings corresponding. This explicitly means, that e.g. the special method used during the session will be kept for the next handshake. So if the session was a TLSv1 session, a SSL client object will use a TLSv1 client method for the next handshake and a SSL server object will use a TLSv1 server method, even if SSLv23_*_methods were chosen on startup. This will might lead to connection failures (see _S_S_L___n_e_w(3)) for a description of the method's properties.

WARNINGS

_S_S_L___c_l_e_a_r_(_) resets the SSL object to allow for another connection. The reset operation however keeps several settings of the last sessions (some of these settings were made automatically during the last handshake). It only makes sense when opening a new session (or reusing an old one) with the same peer that shares these settings. _S_S_L___c_l_e_a_r_(_) is not a short form for the sequence _S_S_L___f_r_e_e(3); _S_S_L___n_e_w(3); .

RETURN VALUES

The following return values can occur:
0 The _S_S_L___c_l_e_a_r_(_) operation could not be performed. Check the error stack to
find out the reason.
1 The _S_S_L___c_l_e_a_r_(_) operation was successful.

_S_S_L___n_e_w(3), _S_S_L___f_r_e_e(3), _S_S_L___s_h_u_t_d_o_w_n(3), _S_S_L___s_e_t___s_h_u_t_d_o_w_n(3), _S_S_L___C_T_X___s_e_t___o_p_t_i_o_n_s(3), _s_s_l(3), _S_S_L___C_T_X___s_e_t___c_l_i_e_n_t___c_e_r_t___c_b(3)