netfilter: rt: add support to fetch path mss

to be used in combination with tcp option set support to mimic iptables TCPMSS --clamp-mss-to-pmtu. v2: Eric Dumazet points out dst must be initialized.

Florian Westphal committed 9 years ago

Commit 6b5dc981 parent 99d17122 files · +68 −0Browse files

Showing the changes to include/uapi/linux (1 of 2 files). Show all

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include/uapi/linux/netfilter/nf_tables.h+2−0

@@ -811,11 +811,13 @@ enum nft_meta_keys { · 810 unmodified lines
811	811	* @NFT_RT_CLASSID: realm value of packet's route (skb->dst->tclassid)
812	812	* @NFT_RT_NEXTHOP4: routing nexthop for IPv4
813	813	* @NFT_RT_NEXTHOP6: routing nexthop for IPv6
	814	+ * @NFT_RT_TCPMSS: fetch current path tcp mss
814	815	*/
815	816	enum nft_rt_keys {
816	817	NFT_RT_CLASSID,
817	818	NFT_RT_NEXTHOP4,
818	819	NFT_RT_NEXTHOP6,
	820	+ NFT_RT_TCPMSS,
819	821	};
820	822
821	823	/**