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7cf245a37e
Fix all files in samples/bpf to include libbpf header files with the bpf/
prefix, to be consistent with external users of the library. Also ensure
that all includes of exported libbpf header files (those that are exported
on 'make install' of the library) use bracketed includes instead of quoted.
To make sure no new files are introduced that doesn't include the bpf/
prefix in its include, remove tools/lib/bpf from the include path entirely,
and use tools/lib instead.
Fixes: 6910d7d386 ("selftests/bpf: Ensure bpf_helper_defs.h are taken from selftests dir")
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/157952560911.1683545.8795966751309534150.stgit@toke.dk
44 lines
1.2 KiB
C
44 lines
1.2 KiB
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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#define KBUILD_MODNAME "foo"
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#include <linux/ip.h>
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#include <linux/ipv6.h>
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#include <linux/in.h>
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#include <linux/tcp.h>
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#include <linux/udp.h>
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#include <uapi/linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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#include "bpf_legacy.h"
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#define DEFAULT_PKTGEN_UDP_PORT 9
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#define IP_MF 0x2000
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#define IP_OFFSET 0x1FFF
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static inline int ip_is_fragment(struct __sk_buff *ctx, __u64 nhoff)
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{
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return load_half(ctx, nhoff + offsetof(struct iphdr, frag_off))
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& (IP_MF | IP_OFFSET);
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}
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SEC("ldabs")
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int handle_ingress(struct __sk_buff *skb)
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{
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__u64 troff = ETH_HLEN + sizeof(struct iphdr);
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if (load_half(skb, offsetof(struct ethhdr, h_proto)) != ETH_P_IP)
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return 0;
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if (load_byte(skb, ETH_HLEN + offsetof(struct iphdr, protocol)) != IPPROTO_UDP ||
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load_byte(skb, ETH_HLEN) != 0x45)
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return 0;
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if (ip_is_fragment(skb, ETH_HLEN))
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return 0;
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if (load_half(skb, troff + offsetof(struct udphdr, dest)) == DEFAULT_PKTGEN_UDP_PORT)
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return TC_ACT_SHOT;
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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