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