1 // SPDX-License-Identifier: GPL-2.0 2 #include <stdio.h> 3 #include <assert.h> 4 #include <linux/bpf.h> 5 #include <bpf/bpf.h> 6 #include <bpf/libbpf.h> 7 #include "sock_example.h" 8 #include <unistd.h> 9 #include <arpa/inet.h> 10 11 int main(int ac, char **argv) 12 { 13 struct bpf_object *obj; 14 int map_fd, prog_fd; 15 char filename[256]; 16 int i, sock; 17 FILE *f; 18 19 snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); 20 21 if (bpf_prog_load(filename, BPF_PROG_TYPE_SOCKET_FILTER, 22 &obj, &prog_fd)) 23 return 1; 24 25 map_fd = bpf_object__find_map_fd_by_name(obj, "my_map"); 26 27 sock = open_raw_sock("lo"); 28 29 assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd, 30 sizeof(prog_fd)) == 0); 31 32 f = popen("ping -4 -c5 localhost", "r"); 33 (void) f; 34 35 for (i = 0; i < 5; i++) { 36 long long tcp_cnt, udp_cnt, icmp_cnt; 37 int key; 38 39 key = IPPROTO_TCP; 40 assert(bpf_map_lookup_elem(map_fd, &key, &tcp_cnt) == 0); 41 42 key = IPPROTO_UDP; 43 assert(bpf_map_lookup_elem(map_fd, &key, &udp_cnt) == 0); 44 45 key = IPPROTO_ICMP; 46 assert(bpf_map_lookup_elem(map_fd, &key, &icmp_cnt) == 0); 47 48 printf("TCP %lld UDP %lld ICMP %lld bytes\n", 49 tcp_cnt, udp_cnt, icmp_cnt); 50 sleep(1); 51 } 52 53 return 0; 54 } 55