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