1// SPDX-License-Identifier: GPL-2.0
2#include <stdio.h>
3#include <assert.h>
4#include <linux/bpf.h>
5#include <bpf/bpf.h>
6#include <bpf/libbpf.h>
7#include "sock_example.h"
8#include <unistd.h>
9#include <arpa/inet.h>
10
11int main(int ac, char **argv)
12{
13	struct bpf_object *obj;
14	struct bpf_program *prog;
15	int map_fd, prog_fd;
16	char filename[256];
17	int i, sock, err;
18	FILE *f;
19
20	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
21
22	obj = bpf_object__open_file(filename, NULL);
23	if (libbpf_get_error(obj))
24		return 1;
25
26	prog = bpf_object__next_program(obj, NULL);
27	bpf_program__set_type(prog, BPF_PROG_TYPE_SOCKET_FILTER);
28
29	err = bpf_object__load(obj);
30	if (err)
31		return 1;
32
33	prog_fd = bpf_program__fd(prog);
34	map_fd = bpf_object__find_map_fd_by_name(obj, "my_map");
35
36	sock = open_raw_sock("lo");
37
38	assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd,
39			  sizeof(prog_fd)) == 0);
40
41	f = popen("ping -4 -c5 localhost", "r");
42	(void) f;
43
44	for (i = 0; i < 5; i++) {
45		long long tcp_cnt, udp_cnt, icmp_cnt;
46		int key;
47
48		key = IPPROTO_TCP;
49		assert(bpf_map_lookup_elem(map_fd, &key, &tcp_cnt) == 0);
50
51		key = IPPROTO_UDP;
52		assert(bpf_map_lookup_elem(map_fd, &key, &udp_cnt) == 0);
53
54		key = IPPROTO_ICMP;
55		assert(bpf_map_lookup_elem(map_fd, &key, &icmp_cnt) == 0);
56
57		printf("TCP %lld UDP %lld ICMP %lld bytes\n",
58		       tcp_cnt, udp_cnt, icmp_cnt);
59		sleep(1);
60	}
61
62	return 0;
63}
64