gnutls_heartbeat_ping(3) gnutls gnutls_heartbeat_ping(3)

gnutls_heartbeat_ping - API function

#include <gnutls/gnutls.h>

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

is a gnutls_session_t type.
is the length of the ping payload.
if flags is GNUTLS_HEARTBEAT_WAIT then this sets the number of retransmissions. Use zero for indefinite (until timeout).
if GNUTLS_HEARTBEAT_WAIT then wait for pong or timeout instead of returning immediately.

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.

GNUTLS_E_SUCCESS on success, otherwise a negative error code.


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3.8.5 gnutls