code chunk

code1.c

struct sock *__inet_lookup_skb(tcp_hashinfo, skb, src_port, dst_port)
{
    /* Get the IPv4 header to know the source and destination IP's */
    const struct iphdr *iph = ip_hdr(skb);

    /*
     * Look up the incoming skb in tcp_hashinfo using the
     * [ Source-IP:Port, Destination-IP:Port ] tuple.
     */
    return __inet_lookup(tcp_hashinfo, skb, iph->saddr, src_port, iph->daddr, dst_port);
}