2014-12-01 16:06:38 -07:00
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#include <uapi/linux/bpf.h>
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#include <uapi/linux/if_ether.h>
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2015-03-13 12:57:43 -06:00
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#include <uapi/linux/if_packet.h>
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2014-12-01 16:06:38 -07:00
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#include <uapi/linux/ip.h>
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2020-01-20 06:06:49 -07:00
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#include <bpf/bpf_helpers.h>
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2019-10-08 11:59:37 -06:00
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#include "bpf_legacy.h"
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2014-12-01 16:06:38 -07:00
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2019-11-06 17:51:53 -07:00
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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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2014-12-01 16:06:38 -07:00
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SEC("socket1")
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2015-03-13 12:57:43 -06:00
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int bpf_prog1(struct __sk_buff *skb)
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2014-12-01 16:06:38 -07:00
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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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2015-03-13 12:57:43 -06:00
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if (skb->pkt_type != PACKET_OUTGOING)
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return 0;
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2014-12-01 16:06:38 -07:00
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value = bpf_map_lookup_elem(&my_map, &index);
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if (value)
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2015-03-13 12:57:43 -06:00
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__sync_fetch_and_add(value, skb->len);
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2014-12-01 16:06:38 -07:00
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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