fcgs_rspnid_req_s
struct fcgs_rspnid_req_s *rspnid =
(struct fcgs_rspnid_req_s *)(cthdr + 1);
memset(rspnid, 0, sizeof(struct fcgs_rspnid_req_s));
return sizeof(struct fcgs_rspnid_req_s) + sizeof(struct ct_hdr_s);