L2TP_CALL_ASSERT
L2TP_CALL_ASSERT(sizeof(ppp->phy_info) >= _this->ctrl->peer.ss_len);
L2TP_CALL_ASSERT(_this != NULL);
L2TP_CALL_ASSERT(_this != NULL ||
L2TP_CALL_ASSERT(_this != NULL);
L2TP_CALL_ASSERT(ppp != NULL);
L2TP_CALL_ASSERT(ppp->phy_context != NULL);