gnutls_rehandshake

gnutls_rehandshake(3)                gnutls                gnutls_rehandshake(3)



NAME
       gnutls_rehandshake - API function

SYNOPSIS
       #include <gnutls/gnutls.h>

       int gnutls_rehandshake(gnutls_session_t session);

ARGUMENTS
       gnutls_session_t session
                   is a gnutls_session_t type.

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.

RETURNS
       GNUTLS_E_SUCCESS on success, otherwise a negative error code.

REPORTING BUGS
       Report bugs to <bugs@gnutls.org>.
       Home page: https://www.gnutls.org


COPYRIGHT
       Copyright © 2001-2020 Free Software Foundation, Inc., and others.
       Copying and distribution of this file, with or without modification, are
       permitted in any medium without royalty provided the copyright notice and
       this notice are preserved.

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/

gnutls                               3.6.13                gnutls_rehandshake(3)