IP_CT_TCP_FLAG_MAXACK_SET
if ((ct->proto.tcp.seen[!dir].flags & IP_CT_TCP_FLAG_MAXACK_SET) &&
if (!(sender->flags & IP_CT_TCP_FLAG_MAXACK_SET)) {
sender->flags |= IP_CT_TCP_FLAG_MAXACK_SET;
tcp->seen[0].flags &= ~IP_CT_TCP_FLAG_MAXACK_SET;
tcp->seen[1].flags &= ~IP_CT_TCP_FLAG_MAXACK_SET;