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
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.
This page is part of the GnuTLS (GnuTLS Transport Layer Security
Library) project. Information about the project can be found at
⟨http://www.gnutls.org/⟩. If you have a bug report for this
manual page, send it to email@example.com. This page was obtained
from the tarball gnutls-3.7.2.tar.xz fetched from
⟨http://www.gnutls.org/download.html⟩ on 2021-08-27. If you
discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for
the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original
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gnutls 3.7.2 gnutls_rehandshake(3)