gnutls_handshake_set_hook_function(3)
NAME
gnutls_handshake_set_hook_function - API function
SYNOPSIS
#include <gnutls/gnutls.h>
gnutls_handshake_set_hook_function(3) session,
unsigned int htype, int when, gnutls_handshake_hook_func func);
ARGUMENTS
gnutls_session_t session
is a gnutls_session_t type
unsigned int htype
the gnutls_handshake_description_t of the message to hook
at
int when GNUTLS_HOOK_* depending on when the hook function should be
called
gnutls_handshake_hook_func func
is the function to be called
DESCRIPTION
This function will set a callback to be called after or before the
specified handshake message has been received or generated. This is a
generalization of gnutls_handshake_set_post_client_hello_function().
To call the hook function prior to the message being generated or pro-
cessed use GNUTLS_HOOK_PRE as when parameter, GNUTLS_HOOK_POST to call
after, and GNUTLS_HOOK_BOTH for both cases.
This callback must return 0 on success or a gnutls error code to termi-
nate the handshake.
To hook at all handshake messages use an htype of GNUTLS_HAND-
SHAKE_ANY.
WARNING
You should not use this function to terminate the handshake based on
client input unless you know what you are doing. Before the handshake
is finished there is no way to know if there is a man-in-the-middle
attack being performed.
REPORTING BUGS
Report bugs to <bugs@gnutls.org>.
Home page: http://www.gnutls.org
COPYRIGHT
Copyright (C) 2001-2018 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
http://www.gnutls.org/manual/
gnutls gnutls_handshake_set_hook_function(3)
gnutls 3.6.5 - Generated Sun Jan 20 14:37:33 CST 2019