sk_run_filter(9) [centos man page]

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)

CFG80211_TESTMODE_AL(9) 					     Test mode						   CFG80211_TESTMODE_AL(9)

NAME

       cfg80211_testmode_alloc_reply_skb - allocate testmode reply

SYNOPSIS

       struct sk_buff * cfg80211_testmode_alloc_reply_skb(struct wiphy * wiphy, int approxlen);

ARGUMENTS

       wiphy
	   the wiphy

       approxlen
	   an upper bound of the length of the data that will be put into the skb

DESCRIPTION

       This function allocates and pre-fills an skb for a reply to the testmode command. Since it is intended for a reply, calling it outside of
       the testmode_cmd operation is invalid.

       The returned skb is pre-filled with the wiphy index and set up in a way that any data that is put into the skb (with skb_put, nla_put or
       similar) will end up being within the NL80211_ATTR_TESTDATA attribute, so all that needs to be done with the skb is adding data for the
       corresponding userspace tool which can then read that data out of the testdata attribute. You must not modify the skb in any other way.

       When done, call cfg80211_testmode_reply with the skb and return its error code as the result of the testmode_cmd operation.

RETURN

       An allocated and pre-filled skb.  NULL if any errors happen.

AUTHOR

       Johannes Berg <johannes@sipsolutions.net>
	   Author.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						   CFG80211_TESTMODE_AL(9)