sk_filter(9)
NAME
sk_filter - run a packet through a socket filter
SYNOPSIS
int sk_filter(struct sock * sk, struct sk_buff * skb);
ARGUMENTS
- sk
- sock associated with sk_buff
- skb
- buffer to filter
DESCRIPTION
Run the filter code and then cut skb->data to correct size returned by
sk_run_filter. If pkt_len is 0 we toss packet. If skb->len is smaller
than pkt_len we keep whole skb->data. This is the socket level wrapper
to sk_run_filter. It returns 0 if the packet should be accepted or
-EPERM if the packet should be tossed.