ipv6: Add hop-by-hop header to jumbograms in ip6_output
Instead of simply forcing a 0 payload_len in IPv6 header, implement RFC 2675 and insert a custom extension header. Note that only TCP stack is currently potentially generating jumbograms, and that this extension header is purely local, it wont be sent on a physical link. This is needed so that packet capture (tcpdump and friends) can properly dissect these large packets. Signed-off-by: NCoco Li <lixiaoyan@google.com> Signed-off-by: NEric Dumazet <edumazet@google.com> Acked-by: NAlexander Duyck <alexanderduyck@fb.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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