GUE_PLEN_REMCSUM
return (flags & GUE_PFLAG_REMCSUM) ? GUE_PLEN_REMCSUM : 0;
data += GUE_PLEN_REMCSUM;
doffset += GUE_PLEN_REMCSUM;
doffset += GUE_PLEN_REMCSUM;
len += GUE_PLEN_REMCSUM;
optlen += GUE_PLEN_REMCSUM;
optlen += GUE_PLEN_REMCSUM + GUE_LEN_PRIV;
data += GUE_PLEN_REMCSUM;
gue_optlen += GUE_PLEN_REMCSUM + GUE_LEN_PRIV;
gue_optlen += GUE_PLEN_REMCSUM + GUE_LEN_PRIV;
mtu -= GUE_PLEN_REMCSUM + GUE_LEN_PRIV;
mtu -= GUE_PLEN_REMCSUM + GUE_LEN_PRIV;