"struct tcphdr" follows the wire format dictated by the TCP protocol. It positively has not changed between 5.3 and 5.4, and cannot. It would make no sense, sin

"struct tcphdr" follows the wire format dictated by the TCP protocol. It positively has not changed between 5.3 and 5.4, and cannot. It would make no sense, since it would violate RFCs and fail to interoperate. https://elixir.bootlin.com/linux/v5.3/source/include/uapi/linux/tcp.h#L25 https://elixir.bootlin.com/linux/v5.3/source/include/uapi/li... https://elixir.bootlin.com/linux/v5.4/source/include/uapi/linux/tcp.h#L25 https://elixir.bootlin.com/linux/v5.4/source/include/uapi/li...