dccp_ackvector_state
extern u_char dccp_ackvector_state(struct dccpcb *, u_int32_t);
u_char dccp_ackvector_state(struct dccpcb *, u_int64_t);
st = dccp_ackvector_state(dp, i);
st = dccp_ackvector_state(dp, i);
st = dccp_ackvector_state(dp, i);
st = dccp_ackvector_state(dp, i);