samples/bpf/sockex2_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 #include <sys/resource.h>
  10
  11 struct pair {
  12         __u64 packets;
  13         __u64 bytes;
  14 };
  15
  16 int main(int ac, char **argv)
  17 {
  18         struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
  19         char filename[256];
  20         FILE *f;
  21         int i, sock;
  22
  23         snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
  24         setrlimit(RLIMIT_MEMLOCK, &r);
  25
  26         if (load_bpf_file(filename)) {
  27                 printf("%s", bpf_log_buf);
  28                 return 1;
  29         }
  30
  31         sock = open_raw_sock("lo");
  32
  33         assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, prog_fd,
  34                           sizeof(prog_fd[0])) == 0);
  35
  36         f = popen("ping -c5 localhost", "r");
  37         (void) f;
  38
  39         for (i = 0; i < 5; i++) {
  40                 int key = 0, next_key;
  41                 struct pair value;
  42
  43                 while (bpf_map_get_next_key(map_fd[0], &key, &next_key) == 0) {
  44                         bpf_map_lookup_elem(map_fd[0], &next_key, &value);
  45                         printf("ip %s bytes %lld packets %lld\n",
  46                                inet_ntoa((struct in_addr){htonl(next_key)}),
  47                                value.bytes, value.packets);
  48                         key = next_key;
  49                 }
  50                 sleep(1);
  51         }
  52         return 0;
  53 }