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30 lines
661 B
30 lines
661 B
#include <uapi/linux/bpf.h> |
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#include <uapi/linux/if_ether.h> |
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#include <uapi/linux/if_packet.h> |
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#include <uapi/linux/ip.h> |
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#include <bpf/bpf_helpers.h> |
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#include "bpf_legacy.h" |
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struct { |
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__uint(type, BPF_MAP_TYPE_ARRAY); |
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__type(key, u32); |
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__type(value, long); |
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__uint(max_entries, 256); |
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} my_map SEC(".maps"); |
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SEC("socket1") |
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int bpf_prog1(struct __sk_buff *skb) |
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{ |
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int index = load_byte(skb, ETH_HLEN + offsetof(struct iphdr, protocol)); |
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long *value; |
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if (skb->pkt_type != PACKET_OUTGOING) |
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return 0; |
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value = bpf_map_lookup_elem(&my_map, &index); |
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if (value) |
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__sync_fetch_and_add(value, skb->len); |
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return 0; |
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} |
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char _license[] SEC("license") = "GPL";
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