linux/samples/bpf/xdp_tx_iptunnel_common.h
Martin KaFai Lau 12d8bb64e3 bpf: xdp: Add XDP example for head adjustment
The XDP prog checks if the incoming packet matches any VIP:PORT
combination in the BPF hashmap.  If it is, it will encapsulate
the packet with a IPv4/v6 header as instructed by the value of
the BPF hashmap and then XDP_TX it out.

The VIP:PORT -> IP-Encap-Info can be specified by the cmd args
of the user prog.

Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-08 14:25:13 -05:00

38 lines
634 B
C

/* Copyright (c) 2016 Facebook
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*/
#ifndef _SAMPLES_BPF_XDP_TX_IPTNL_COMMON_H
#define _SAMPLES_BPF_XDP_TX_IPTNL_COMMON_H
#include <linux/types.h>
#define MAX_IPTNL_ENTRIES 256U
struct vip {
union {
__u32 v6[4];
__u32 v4;
} daddr;
__u16 dport;
__u16 family;
__u8 protocol;
};
struct iptnl_info {
union {
__u32 v6[4];
__u32 v4;
} saddr;
union {
__u32 v6[4];
__u32 v4;
} daddr;
__u16 family;
__u8 dmac[6];
};
#endif