centos man page for sk_run_filter

SK_RUN_FILTER(9)						 Linux Networking						  SK_RUN_FILTER(9)

NAME
       sk_run_filter - run a filter on a socket

SYNOPSIS
       unsigned int sk_run_filter(const struct sk_buff * skb, const struct sock_filter * fentry);

ARGUMENTS
       skb
	   buffer to run the filter on

       fentry
	   filter to apply

DESCRIPTION
       Decode and apply filter instructions to the skb->data. Return length to keep, 0 for none.  skb is the data we are filtering, filter is the
       array of filter instructions. Because all jumps are guaranteed to be before last instruction, and last instruction guaranteed to be a RET,
       we dont need to check flen. (We used to pass to this function the length of filter)

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							  SK_RUN_FILTER(9)