centos man page for sk_attach_filter

SK_ATTACH_FILTER(9)						 Linux Networking					       SK_ATTACH_FILTER(9)

NAME
       sk_attach_filter - attach a socket filter

SYNOPSIS
       int sk_attach_filter(struct sock_fprog * fprog, struct sock * sk);

ARGUMENTS
       fprog
	   the filter program

       sk
	   the socket to use

DESCRIPTION
       Attach the user's filter code. We first run some sanity checks on it to make sure it does not explode on us later. If an error occurs or
       there is insufficient memory for the filter a negative errno code is returned. On success the return is zero.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						       SK_ATTACH_FILTER(9)