ng_l2cap_discon_req_cp
typedef ng_l2cap_discon_req_cp ng_l2cap_discon_rsp_cp;
ng_l2cap_discon_req_cp param; \
ng_l2cap_discon_req_cp *cp = NULL;
cp = mtod(con->rx_pkt, ng_l2cap_discon_req_cp *);