Alexei Starovoitov fbe3310840 samples: bpf: large eBPF program in C ... sockex2_kern.c is purposefully large eBPF program in C. llvm compiles ~200 lines of C code into ~300 eBPF instructions. It's similar to __skb_flow_dissect() to demonstrate that complex packet parsing can be done by eBPF. Then it uses (struct flow_keys)->dst IP address (or hash of ipv6 dst) to keep stats of number of packets per IP. User space loads eBPF program, attaches it to loopback interface and prints dest_ip->#packets stats every second. Usage: $sudo samples/bpf/sockex2 ip 127.0.0.1 count 19 ip 127.0.0.1 count 178115 ip 127.0.0.1 count 369437 ip 127.0.0.1 count 559841 ip 127.0.0.1 count 750539 Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2014-12-05 21:47:34 -08:00
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bpf_helpers.h
bpf_load.c
bpf_load.h
libbpf.c
libbpf.h
Makefile
sock_example.c
sockex1_kern.c
sockex1_user.c
sockex2_kern.c
sockex2_user.c
test_maps.c
test_verifier.c