1 // SPDX-License-Identifier: GPL-2.0
6 #include <bpf/libbpf.h>
7 #include "sock_example.h"
10 #include <sys/resource.h>
17 int main(int ac, char **argv)
19 struct bpf_program *prog;
20 struct bpf_object *obj;
26 snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
27 obj = bpf_object__open_file(filename, NULL);
28 if (libbpf_get_error(obj))
31 prog = bpf_object__next_program(obj, NULL);
32 bpf_program__set_type(prog, BPF_PROG_TYPE_SOCKET_FILTER);
34 err = bpf_object__load(obj);
38 prog_fd = bpf_program__fd(prog);
39 map_fd = bpf_object__find_map_fd_by_name(obj, "hash_map");
41 sock = open_raw_sock("lo");
43 assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd,
44 sizeof(prog_fd)) == 0);
46 f = popen("ping -4 -c5 localhost", "r");
49 for (i = 0; i < 5; i++) {
50 int key = 0, next_key;
53 while (bpf_map_get_next_key(map_fd, &key, &next_key) == 0) {
54 bpf_map_lookup_elem(map_fd, &next_key, &value);
55 printf("ip %s bytes %lld packets %lld\n",
56 inet_ntoa((struct in_addr){htonl(next_key)}),
57 value.bytes, value.packets);