samples/bpf/sockex1_user.c

   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_load.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         char filename[256];
  14         FILE *f;
  15         int i, sock;
  16
  17         snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
  18
  19         if (load_bpf_file(filename)) {
  20                 printf("%s", bpf_log_buf);
  21                 return 1;
  22         }
  23
  24         sock = open_raw_sock("lo");
  25
  26         assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, prog_fd,
  27                           sizeof(prog_fd[0])) == 0);
  28
  29         f = popen("ping -c5 localhost", "r");
  30         (void) f;
  31
  32         for (i = 0; i < 5; i++) {
  33                 long long tcp_cnt, udp_cnt, icmp_cnt;
  34                 int key;
  35
  36                 key = IPPROTO_TCP;
  37                 assert(bpf_map_lookup_elem(map_fd[0], &key, &tcp_cnt) == 0);
  38
  39                 key = IPPROTO_UDP;
  40                 assert(bpf_map_lookup_elem(map_fd[0], &key, &udp_cnt) == 0);
  41
  42                 key = IPPROTO_ICMP;
  43                 assert(bpf_map_lookup_elem(map_fd[0], &key, &icmp_cnt) == 0);
  44
  45                 printf("TCP %lld UDP %lld ICMP %lld bytes\n",
  46                        tcp_cnt, udp_cnt, icmp_cnt);
  47                 sleep(1);
  48         }
  49
  50         return 0;
  51 }