55 lines
1.1 KiB
C
55 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <stdio.h>
|
|
#include <assert.h>
|
|
#include <linux/bpf.h>
|
|
#include <bpf/bpf.h>
|
|
#include "libbpf.h"
|
|
#include "sock_example.h"
|
|
#include <unistd.h>
|
|
#include <arpa/inet.h>
|
|
|
|
int main(int ac, char **argv)
|
|
{
|
|
struct bpf_object *obj;
|
|
int map_fd, prog_fd;
|
|
char filename[256];
|
|
int i, sock;
|
|
FILE *f;
|
|
|
|
snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
|
|
|
|
if (bpf_prog_load(filename, BPF_PROG_TYPE_SOCKET_FILTER,
|
|
&obj, &prog_fd))
|
|
return 1;
|
|
|
|
map_fd = bpf_object__find_map_fd_by_name(obj, "my_map");
|
|
|
|
sock = open_raw_sock("lo");
|
|
|
|
assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd,
|
|
sizeof(prog_fd)) == 0);
|
|
|
|
f = popen("ping -4 -c5 localhost", "r");
|
|
(void) f;
|
|
|
|
for (i = 0; i < 5; i++) {
|
|
long long tcp_cnt, udp_cnt, icmp_cnt;
|
|
int key;
|
|
|
|
key = IPPROTO_TCP;
|
|
assert(bpf_map_lookup_elem(map_fd, &key, &tcp_cnt) == 0);
|
|
|
|
key = IPPROTO_UDP;
|
|
assert(bpf_map_lookup_elem(map_fd, &key, &udp_cnt) == 0);
|
|
|
|
key = IPPROTO_ICMP;
|
|
assert(bpf_map_lookup_elem(map_fd, &key, &icmp_cnt) == 0);
|
|
|
|
printf("TCP %lld UDP %lld ICMP %lld bytes\n",
|
|
tcp_cnt, udp_cnt, icmp_cnt);
|
|
sleep(1);
|
|
}
|
|
|
|
return 0;
|
|
}
|