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IPVS callers already parse the packet into struct ip_vs_iphdr before updating connection state. For IPv6 this records the real transport-header offset after extension headers in iph.len. Pass this parsed transport offset through ip_vs_set_state() and the protocol state_transition() callback so protocol handlers can use the same packet context as scheduling and NAT handling. This patch only changes the common callback plumbing and adapts the protocol callback signatures; TCP and SCTP start using the value in follow-up patches. Signed-off-by: Yizhou Zhao <zhaoyz24@mails.tsinghua.edu.cn> Acked-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Florian Westphal <fw@strlen.de>