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 | { | |
bc1a8597 | 27 | int i, sock, key, fd, main_prog_fd, jmp_table_fd, hash_map_fd; |
bc1a8597 DL |
28 | struct bpf_program *prog; |
29 | struct bpf_object *obj; | |
698584df | 30 | const char *section; |
530b2c86 AS |
31 | char filename[256]; |
32 | FILE *f; | |
530b2c86 AS |
33 | |
34 | snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); | |
35 | ||
bc1a8597 DL |
36 | obj = bpf_object__open_file(filename, NULL); |
37 | if (libbpf_get_error(obj)) { | |
38 | fprintf(stderr, "ERROR: opening BPF object file failed\n"); | |
39 | return 0; | |
40 | } | |
41 | ||
42 | /* load BPF program */ | |
43 | if (bpf_object__load(obj)) { | |
44 | fprintf(stderr, "ERROR: loading BPF object file failed\n"); | |
45 | goto cleanup; | |
46 | } | |
47 | ||
48 | jmp_table_fd = bpf_object__find_map_fd_by_name(obj, "jmp_table"); | |
49 | hash_map_fd = bpf_object__find_map_fd_by_name(obj, "hash_map"); | |
50 | if (jmp_table_fd < 0 || hash_map_fd < 0) { | |
51 | fprintf(stderr, "ERROR: finding a map in obj file failed\n"); | |
52 | goto cleanup; | |
530b2c86 AS |
53 | } |
54 | ||
bc1a8597 DL |
55 | bpf_object__for_each_program(prog, obj) { |
56 | fd = bpf_program__fd(prog); | |
57 | ||
698584df DL |
58 | section = bpf_program__section_name(prog); |
59 | if (sscanf(section, "socket/%d", &key) != 1) { | |
bc1a8597 DL |
60 | fprintf(stderr, "ERROR: finding prog failed\n"); |
61 | goto cleanup; | |
62 | } | |
63 | ||
64 | if (key == 0) | |
65 | main_prog_fd = fd; | |
66 | else | |
67 | bpf_map_update_elem(jmp_table_fd, &key, &fd, BPF_ANY); | |
68 | } | |
a8744f25 | 69 | |
530b2c86 AS |
70 | sock = open_raw_sock("lo"); |
71 | ||
bc1a8597 DL |
72 | /* attach BPF program to socket */ |
73 | assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &main_prog_fd, | |
530b2c86 AS |
74 | sizeof(__u32)) == 0); |
75 | ||
76 | if (argc > 1) | |
5c3cf87d | 77 | f = popen("ping -4 -c5 localhost", "r"); |
530b2c86 AS |
78 | else |
79 | f = popen("netperf -l 4 localhost", "r"); | |
80 | (void) f; | |
81 | ||
82 | for (i = 0; i < 5; i++) { | |
32c00979 | 83 | struct flow_key_record key = {}, next_key; |
530b2c86 AS |
84 | struct pair value; |
85 | ||
86 | sleep(1); | |
87 | printf("IP src.port -> dst.port bytes packets\n"); | |
bc1a8597 DL |
88 | while (bpf_map_get_next_key(hash_map_fd, &key, &next_key) == 0) { |
89 | bpf_map_lookup_elem(hash_map_fd, &next_key, &value); | |
530b2c86 AS |
90 | printf("%s.%05d -> %s.%05d %12lld %12lld\n", |
91 | inet_ntoa((struct in_addr){htonl(next_key.src)}), | |
92 | next_key.port16[0], | |
93 | inet_ntoa((struct in_addr){htonl(next_key.dst)}), | |
94 | next_key.port16[1], | |
95 | value.bytes, value.packets); | |
96 | key = next_key; | |
97 | } | |
98 | } | |
bc1a8597 DL |
99 | |
100 | cleanup: | |
101 | bpf_object__close(obj); | |
530b2c86 AS |
102 | return 0; |
103 | } |