sk_filter_trim_cap9
Run a packet through a socket filter
Usage
int sk_filter_trim_cap(struct sock * sk, struct sk_buff * skb, unsigned int cap);
Arguments
sk
sock associated with sk_buff
skb
buffer to filter
cap
limit on how short the eBPF program may trim the packet
Overview
Run the eBPF program and then cut skb->data to correct size returned by the program. 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 BPF_PROG_RUN. It returns 0 if the packet should be accepted or -EPERM if the packet should be tossed.
Releases
2 releases since Debian 8 (Jessie); the text changed 1 time.