// SPDX-License-Identifier: GPL-2.0 #include <stdio.h> #include <assert.h> #include <linux/bpf.h> #include <bpf/bpf.h> #include <bpf/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; }