gnutls_heartbeat_ping(3)

NAME
gnutls_heartbeat_ping - API function

SYNOPSIS
#include <gnutls/gnutls.h>

int gnutls_heartbeat_ping(gnutls_session_t session, size_t data_size, unsigned int max_tries, unsigned int flags);

ARGUMENTS

gnutls_session_t session
    is a gnutls_session_t type.

size_t data_size
    is the length of the ping payload.

unsigned int max_tries
    if flags is GNUTLS_HEARTBEAT_WAIT then this sets the number of retransmissions. Use zero for indefinite (until timeout).

unsigned int flags
    if GNUTLS_HEARTBEAT_WAIT then wait for pong or timeout instead of returning immediately.

DESCRIPTION
This function sends a ping to the peer. If the flags is set to GNUTLS_HEARTBEAT_WAIT then it waits for a reply from the peer. Note that it is highly recommended to use this function with the flag GNUTLS_HEARTBEAT_WAIT, or you need to handle retransmissions and timeouts manually. The total TLS data transmitted as part of the ping message are given by the following formula: MAX(16, data_size )+gnutls_record_overhead_size()+3.

RETURNS
GNUTLS_E_SUCCESS on success, otherwise a negative error code.

SINCE
3.1.2

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

COPYRIGHT
Copyright © 2001-2019 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/