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