SSL_CTX_SET_QUIET_SHUTDOWN(3)                         Library Functions Manual

NAME
     SSL_CTX_set_quiet_shutdown, SSL_CTX_get_quiet_shutdown,
     SSL_set_quiet_shutdown, SSL_get_quiet_shutdown - manipulate shutdown
     behaviour

SYNOPSIS
     #include <openssl/ssl.h>

     void
     SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode);

     int
     SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx);

     void
     SSL_set_quiet_shutdown(SSL *ssl, int mode);

     int
     SSL_get_quiet_shutdown(const SSL *ssl);

DESCRIPTION
     SSL_CTX_set_quiet_shutdown() sets the "quiet shutdown" flag for ctx to be
     mode.  SSL objects created from ctx inherit the mode valid at the time
     SSL_new(3) is called.  mode may be 0 or 1.

     SSL_CTX_get_quiet_shutdown() returns the "quiet shutdown" setting of ctx.

     SSL_set_quiet_shutdown() sets the "quiet shutdown" flag for ssl to be
     mode.  The setting stays valid until ssl is removed with SSL_free(3) or
     SSL_set_quiet_shutdown() is called again.  It is not changed when
     SSL_clear(3) is called.  mode may be 0 or 1.

     SSL_get_quiet_shutdown() returns the "quiet shutdown" setting of ssl.

     Normally when a SSL connection is finished, the parties must send out
     "close notify" alert messages using SSL_shutdown(3) for a clean shutdown.

     When setting the "quiet shutdown" flag to 1, SSL_shutdown(3) will set the
     internal flags to SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN
     (SSL_shutdown(3) then behaves like SSL_set_shutdown(3) called with
     SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN).  The session is thus considered
     to be shut down, but no "close notify" alert is sent to the peer.  This
     behaviour violates the TLS standard.

     The default is normal shutdown behaviour as described by the TLS
     standard.

RETURN VALUES
     SSL_CTX_get_quiet_shutdown() and SSL_get_quiet_shutdown() return the
     current setting.

SEE ALSO
     ssl(3), SSL_clear(3), SSL_free(3), SSL_new(3), SSL_set_shutdown(3),
     SSL_shutdown(3)

HISTORY
     These functions first appeared in SSLeay 0.8.1 and have been available
     since OpenBSD 2.4.

Linux 6.8.2-arch2-1             March 30, 2020             Linux 6.8.2-arch2-1