Функции API (API function)
Имя (Name)
gnutls_rehandshake - API function
Синопсис (Synopsis)
#include <gnutls/gnutls.h>
int gnutls_rehandshake(gnutls_session_t session);
Аргументы (Arguments)
gnutls_session_t session
is a gnutls_session_t type.
Описание (Description)
This function can only be called in server side, and instructs a
TLS 1.2 or earlier client to renegotiate parameters (perform a
handshake), by sending a hello request message.
If this function succeeds, the calling application should call
gnutls_record_recv() until GNUTLS_E_REHANDSHAKE is returned to
clear any pending data. If the GNUTLS_E_REHANDSHAKE error code is
not seen, then the handshake request was not followed by the peer
(the TLS protocol does not require the client to do, and such
compliance should be handled by the application protocol).
Once the GNUTLS_E_REHANDSHAKE error code is seen, the calling
application should proceed to calling gnutls_handshake() to
negotiate the new parameters.
If the client does not wish to renegotiate parameters he may
reply with an alert message, and in that case the return code
seen by subsequent gnutls_record_recv() will be
GNUTLS_E_WARNING_ALERT_RECEIVED with the specific alert being
GNUTLS_A_NO_RENEGOTIATION. A client may also choose to ignore
this request.
Under TLS 1.3 this function is equivalent to
gnutls_session_key_update() with the GNUTLS_KU_PEER flag. In that
case subsequent calls to gnutls_record_recv() will not return
GNUTLS_E_REHANDSHAKE, and calls to gnutls_handshake() in server
side are a no-op.
This function always fails with GNUTLS_E_INVALID_REQUEST when
called in client side.
Возвращаемое значение (Return value)
GNUTLS_E_SUCCESS on success, otherwise a negative error code.
Сообщение об ошибках (Reporting bugs)
Report bugs to <bugs@gnutls.org>.
Home page: https://www.gnutls.org
Смотри также (See also)
The full documentation for gnutls is maintained as a Texinfo
manual. If the /usr/share/doc/gnutls/ directory does not contain
the HTML form visit
https://www.gnutls.org/manual/
