i_ldc_get_tx_tail
rv = i_ldc_get_tx_tail(ldcp, &tx_tail);
rv = i_ldc_get_tx_tail(ldcp, &tx_tail);
rv = i_ldc_get_tx_tail(ldcp, &tx_tail);
rv = i_ldc_get_tx_tail(ldcp, &tx_tail);
rv = i_ldc_get_tx_tail(ldcp, &tx_tail);
rv = i_ldc_get_tx_tail(ldcp, &tx_tail);
static int i_ldc_get_tx_tail(ldc_chan_t *ldcp, uint64_t *tail);