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