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	int map_fd, prog_fd;
15	char filename[256];
16	int i, sock;
17	FILE *f;
18
19	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
20
21	if (bpf_prog_load(filename, BPF_PROG_TYPE_SOCKET_FILTER,
22			  &obj, &prog_fd))
23		return 1;
24
25	map_fd = bpf_object__find_map_fd_by_name(obj, "my_map");
26
27	sock = open_raw_sock("lo");
28
29	assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd,
30			  sizeof(prog_fd)) == 0);
31
32	f = popen("ping -4 -c5 localhost", "r");
33	(void) f;
34
35	for (i = 0; i < 5; i++) {
36		long long tcp_cnt, udp_cnt, icmp_cnt;
37		int key;
38
39		key = IPPROTO_TCP;
40		assert(bpf_map_lookup_elem(map_fd, &key, &tcp_cnt) == 0);
41
42		key = IPPROTO_UDP;
43		assert(bpf_map_lookup_elem(map_fd, &key, &udp_cnt) == 0);
44
45		key = IPPROTO_ICMP;
46		assert(bpf_map_lookup_elem(map_fd, &key, &icmp_cnt) == 0);
47
48		printf("TCP %lld UDP %lld ICMP %lld bytes\n",
49		       tcp_cnt, udp_cnt, icmp_cnt);
50		sleep(1);
51	}
52
53	return 0;
54}