Hi All, I write an article introducing how to write a kernel module and modify user space tool, i.e. libnftnl and nftables, to add custom experssion. The article is at: https://zasdfgbnm.github.io/2017/09/07/Extending-nftables/ Hope this article is helpful. To admins of nftables wiki: If you think this article is good, would you mind give a link to this article somewhere in the wiki? Xiang Gao -- To unsubscribe from this list: send the line "unsubscribe netfilter" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html