samples/bpf/sockex1_user.c

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