IP checksum calculation

[Ramón Agüero <ramon@xxxxxxxxxxxxxxx>]

    I've developped a module that gets IP_packets, and changes their TOS field, then I call the ip_fast_csum in order to change its checksum.

 

    However, the destin doesn't get any packet. When I capture what I'm sending I see that that function always return the same value (oxffef). May anybody tell me what I'm doing wrong?.

 

    Thanks in advance

 

    Ramón

 

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