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