Checksum Updating

modulename: act_csum.ko


Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>QoS and/or fair queueing
└─>Checksum Updating
In linux kernel since version 2.6.37 (release Date: 2011-01-04)  
Say Y here to update some common checksum after some direct
packet alterations.

To compile this code as a module, choose M here: the
module will be called act_csum.

source code: