ldc_reg_callback
rv = ldc_reg_callback(port->ldc.hdl, ds_ldc_cb, ldc_cb_arg);
if ((rv = ldc_reg_callback(vport->ldc_handle, vcc_ldc_cb,
status = ldc_reg_callback(srvr->ldc_handle, vdc_handle_cb,
if ((status = ldc_reg_callback(vd->ldc_handle, vd_handle_ldc_events,
if ((rv = ldc_reg_callback(vport->ldc_handle,
status = ldc_reg_callback(ldcp->ldc_handle, vgen_ldc_cb, (caddr_t)ldcp);
status = ldc_reg_callback(ldcp->ldc_handle, vsw_ldc_cb, (caddr_t)ldcp);
int ldc_reg_callback(ldc_handle_t handle,