Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
530b2c86 AS |
2 | #include <stdio.h> |
3 | #include <assert.h> | |
2bf3e2ef | 4 | #include <bpf/bpf.h> |
bc1a8597 | 5 | #include <bpf/libbpf.h> |
9899694a | 6 | #include "sock_example.h" |
530b2c86 AS |
7 | #include <unistd.h> |
8 | #include <arpa/inet.h> | |
9 | ||
32c00979 | 10 | struct flow_key_record { |
530b2c86 AS |
11 | __be32 src; |
12 | __be32 dst; | |
13 | union { | |
14 | __be32 ports; | |
15 | __be16 port16[2]; | |
16 | }; | |
17 | __u32 ip_proto; | |
18 | }; | |
19 | ||
20 | struct pair { | |
21 | __u64 packets; | |
22 | __u64 bytes; | |
23 | }; | |
24 | ||
25 | int main(int argc, char **argv) | |
26 | { | |
e5659e4e | 27 | int i, sock, fd, main_prog_fd, hash_map_fd; |
bc1a8597 DL |
28 | struct bpf_program *prog; |
29 | struct bpf_object *obj; | |
530b2c86 AS |
30 | char filename[256]; |
31 | FILE *f; | |
530b2c86 AS |
32 | |
33 | snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); | |
34 | ||
bc1a8597 DL |
35 | obj = bpf_object__open_file(filename, NULL); |
36 | if (libbpf_get_error(obj)) { | |
37 | fprintf(stderr, "ERROR: opening BPF object file failed\n"); | |
38 | return 0; | |
39 | } | |
40 | ||
41 | /* load BPF program */ | |
42 | if (bpf_object__load(obj)) { | |
43 | fprintf(stderr, "ERROR: loading BPF object file failed\n"); | |
44 | goto cleanup; | |
45 | } | |
46 | ||
bc1a8597 | 47 | hash_map_fd = bpf_object__find_map_fd_by_name(obj, "hash_map"); |
e5659e4e | 48 | if (hash_map_fd < 0) { |
bc1a8597 DL |
49 | fprintf(stderr, "ERROR: finding a map in obj file failed\n"); |
50 | goto cleanup; | |
530b2c86 AS |
51 | } |
52 | ||
e5659e4e RT |
53 | /* find BPF main program */ |
54 | main_prog_fd = 0; | |
bc1a8597 DL |
55 | bpf_object__for_each_program(prog, obj) { |
56 | fd = bpf_program__fd(prog); | |
57 | ||
e5659e4e | 58 | if (!strcmp(bpf_program__name(prog), "main_prog")) |
bc1a8597 | 59 | main_prog_fd = fd; |
e5659e4e RT |
60 | } |
61 | ||
62 | if (main_prog_fd == 0) { | |
63 | fprintf(stderr, "ERROR: can't find main_prog\n"); | |
64 | goto cleanup; | |
bc1a8597 | 65 | } |
a8744f25 | 66 | |
530b2c86 AS |
67 | sock = open_raw_sock("lo"); |
68 | ||
bc1a8597 DL |
69 | /* attach BPF program to socket */ |
70 | assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &main_prog_fd, | |
530b2c86 AS |
71 | sizeof(__u32)) == 0); |
72 | ||
73 | if (argc > 1) | |
5c3cf87d | 74 | f = popen("ping -4 -c5 localhost", "r"); |
530b2c86 AS |
75 | else |
76 | f = popen("netperf -l 4 localhost", "r"); | |
77 | (void) f; | |
78 | ||
79 | for (i = 0; i < 5; i++) { | |
32c00979 | 80 | struct flow_key_record key = {}, next_key; |
530b2c86 AS |
81 | struct pair value; |
82 | ||
83 | sleep(1); | |
84 | printf("IP src.port -> dst.port bytes packets\n"); | |
bc1a8597 DL |
85 | while (bpf_map_get_next_key(hash_map_fd, &key, &next_key) == 0) { |
86 | bpf_map_lookup_elem(hash_map_fd, &next_key, &value); | |
530b2c86 AS |
87 | printf("%s.%05d -> %s.%05d %12lld %12lld\n", |
88 | inet_ntoa((struct in_addr){htonl(next_key.src)}), | |
89 | next_key.port16[0], | |
90 | inet_ntoa((struct in_addr){htonl(next_key.dst)}), | |
91 | next_key.port16[1], | |
92 | value.bytes, value.packets); | |
93 | key = next_key; | |
94 | } | |
95 | } | |
bc1a8597 DL |
96 | |
97 | cleanup: | |
98 | bpf_object__close(obj); | |
530b2c86 AS |
99 | return 0; |
100 | } |