1// SPDX-License-Identifier: GPL-2.0
 2#include <stdio.h>
 3#include <assert.h>
 4#include <linux/bpf.h>
 5#include "libbpf.h"
 6#include "bpf_load.h"
 7#include "sock_example.h"
 8#include <unistd.h>
 9#include <arpa/inet.h>
10#include <sys/resource.h>
11
12struct pair {
13	__u64 packets;
14	__u64 bytes;
15};
16
17int main(int ac, char **argv)
18{
19	struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
20	char filename[256];
21	FILE *f;
22	int i, sock;
23
24	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
25	setrlimit(RLIMIT_MEMLOCK, &r);
26
27	if (load_bpf_file(filename)) {
28		printf("%s", bpf_log_buf);
29		return 1;
30	}
31
32	sock = open_raw_sock("lo");
33
34	assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, prog_fd,
35			  sizeof(prog_fd[0])) == 0);
36
37	f = popen("ping -c5 localhost", "r");
38	(void) f;
39
40	for (i = 0; i < 5; i++) {
41		int key = 0, next_key;
42		struct pair value;
43
44		while (bpf_map_get_next_key(map_fd[0], &key, &next_key) == 0) {
45			bpf_map_lookup_elem(map_fd[0], &next_key, &value);
46			printf("ip %s bytes %lld packets %lld\n",
47			       inet_ntoa((struct in_addr){htonl(next_key)}),
48			       value.bytes, value.packets);
49			key = next_key;
50		}
51		sleep(1);
52	}
53	return 0;
54}