static inline int
epoch_alive (gnutls_session_t session, record_parameters_st * params)
{
if (params->usage_cnt > 0)
return 1;
return epoch_is_active(session, params);
}
void _gnutls_epoch_gc(gnutls_session_t session)
{
int i, j;
unsigned int min_index = 0;
_gnutls_record_log("REC[%p]: Start of epoch cleanup\n", session);
/* Free all dead cipher state */
for (i = 0; i < MAX_EPOCH_INDEX; i++) {
if (session->record_parameters[i] != NULL) {
if (!epoch_is_active
(session, session->record_parameters[i])
&& session->record_parameters[i]->usage_cnt)
_gnutls_record_log
("REC[%p]: Note inactive epoch %d has %d users\n",
session,
session->record_parameters[i]->epoch,
session->record_parameters[i]->
usage_cnt);
if (!epoch_alive
(session, session->record_parameters[i])) {
_gnutls_epoch_free(session,
session->
record_parameters[i]);
session->record_parameters[i] = NULL;
}
}
}
/* Look for contiguous NULLs at the start of the array */
for (i = 0;
i < MAX_EPOCH_INDEX && session->record_parameters[i] == NULL;
i++);
min_index = i;
/* Pick up the slack in the epoch window. */
for (i = 0, j = min_index; j < MAX_EPOCH_INDEX; i++, j++)
session->record_parameters[i] =
session->record_parameters[j];
/* Set the new epoch_min */
if (session->record_parameters[0] != NULL)
session->security_parameters.epoch_min =
session->record_parameters[0]->epoch;
_gnutls_record_log("REC[%p]: End of epoch cleanup\n", session);
}