understandable skbuff behavioural problem

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Hello,
       I am learning the skbuff workings in kenrel for
that I added a fake header in TCP/IP with Fake header
containing 2 fields of type int ipchksum and tcpchksum
taken frpm upper layer and only copied to new header.
I directly push it after IP header is added and thus
sending packets to destination pc. At destination side
i am able to receive application data(payload) indeed
correctly in FTP transfer but how to display those 2
fields in kernel using printk?
      I am really stuck at this point please help me.
Thanks in advance.
regards,
linux_lover

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