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NAME | SYNOPSIS | ARGUMENTS | DESCRIPTION | RETURNS | REPORTING BUGS | COPYRIGHT | SEE ALSO | COLOPHON |
gnutls_session_get_data2(3) gnutls gnutls_session_get_data2(3)
gnutls_session_get_data2 - API function
#include <gnutls/gnutls.h>
int gnutls_session_get_data2(gnutls_session_t session, gnutls_datum_t
* data);
gnutls_session_t session
is a gnutls_session_t type.
gnutls_datum_t * data
is a pointer to a datum that will hold the session.
Returns necessary parameters to support resumption. The client should
call this function and store the returned session data. A session can
be resumed later by calling gnutls_session_set_data() with the
returned data. Note that under TLS 1.3, it is recommended for clients
to use session parameters only once, to prevent passive-observers
from correlating the different connections.
The returned data are allocated and must be released using
gnutls_free().
This function will fail if called prior to handshake completion. In
case of false start TLS, the handshake completes only after data have
been successfully received from the peer.
Under TLS1.3 session resumption is possible only after a session
ticket is received by the client. To ensure that such a ticket has
been received use gnutls_session_get_flags() and check for flag
GNUTLS_SFLAGS_SESSION_TICKET; if this flag is not set, this function
will wait for a new ticket within an estimated rountrip, and if not
received will return dummy data which cannot lead to resumption.
To get notified when new tickets are received by the server use
gnutls_handshake_set_hook_function() to wait for
GNUTLS_HANDSHAKE_NEW_SESSION_TICKET messages. Each call of
gnutls_session_get_data2() after a ticket is received, will return
session resumption data corresponding to the last received ticket.
On success, GNUTLS_E_SUCCESS (0) is returned, otherwise an error code
is returned.
Report bugs to <bugs@gnutls.org>.
Home page: https://www.gnutls.org
Copyright © 2001-2019 Free Software Foundation, Inc., and others.
Copying and distribution of this file, with or without modification,
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https://www.gnutls.org/manual/
This page is part of the GnuTLS (GnuTLS Transport Layer Security
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page, send it to bugs@gnutls.org. This page was obtained from the
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gnutls 3.6.9 gnutls_session_get_data2(3)