sooptcopyin
error = sooptcopyin(sopt, afap, sizeof *afap, sizeof *afap);
error = sooptcopyin(sopt, &l, sizeof l, sizeof l);
error = sooptcopyin(sopt, &optval, sizeof optval,
error = sooptcopyin(sopt, &optval, sizeof optval,
error = sooptcopyin(sopt, &tv, sizeof tv,
error = sooptcopyin(sopt, &val32, sizeof val32,
sooptcopyin(sopt, &msg->ioc_nat, sopt->sopt_valsize,
error = sooptcopyin(sopt, &filter, sizeof(filter),
error = sooptcopyin(sopt, &dir, sizeof(dir),
error = sooptcopyin(sopt, &v, sizeof(v), sizeof(v.mtu));
error = sooptcopyin(sopt, &v, sizeof(v),sizeof(v.flow));
error = sooptcopyin(sopt, &v, sizeof(v),
error = sooptcopyin(sopt, &msg->sopt_val,
int sooptcopyin (struct sockopt *sopt, void *buf, size_t len,