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a80857822b
this example does the same task as previous socket example in assembler, but this one does it in C. eBPF program in kernel does: /* assume that packet is IPv4, load one byte of IP->proto */ int index = load_byte(skb, ETH_HLEN + offsetof(struct iphdr, protocol)); long *value; value = bpf_map_lookup_elem(&my_map, &index); if (value) __sync_fetch_and_add(value, 1); Corresponding user space reads map[tcp], map[udp], map[icmp] and prints protocol stats every second Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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.. | ||
bpf | ||
hidraw | ||
hw_breakpoint | ||
kdb | ||
kfifo | ||
kobject | ||
kprobes | ||
rpmsg | ||
seccomp | ||
trace_events | ||
uhid | ||
Kconfig | ||
Makefile |