samples/bpf/sockex3_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 struct flow_keys {
  10         __be32 src;
  11         __be32 dst;
  12         union {
  13                 __be32 ports;
  14                 __be16 port16[2];
  15         };
  16         __u32 ip_proto;
  17 };
  18
  19 struct pair {
  20         __u64 packets;
  21         __u64 bytes;
  22 };
  23
  24 int main(int argc, char **argv)
  25 {
  26         char filename[256];
  27         FILE *f;
  28         int i, sock;
  29
  30         snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
  31
  32         if (load_bpf_file(filename)) {
  33                 printf("%s", bpf_log_buf);
  34                 return 1;
  35         }
  36
  37         sock = open_raw_sock("lo");
  38
  39         assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd[4],
  40                           sizeof(__u32)) == 0);
  41
  42         if (argc > 1)
  43                 f = popen("ping -c5 localhost", "r");
  44         else
  45                 f = popen("netperf -l 4 localhost", "r");
  46         (void) f;
  47
  48         for (i = 0; i < 5; i++) {
  49                 struct flow_keys key = {}, next_key;
  50                 struct pair value;
  51
  52                 sleep(1);
  53                 printf("IP     src.port -> dst.port               bytes      packets\n");
  54                 while (bpf_get_next_key(map_fd[2], &key, &next_key) == 0) {
  55                         bpf_lookup_elem(map_fd[2], &next_key, &value);
  56                         printf("%s.%05d -> %s.%05d %12lld %12lld\n",
  57                                inet_ntoa((struct in_addr){htonl(next_key.src)}),
  58                                next_key.port16[0],
  59                                inet_ntoa((struct in_addr){htonl(next_key.dst)}),
  60                                next_key.port16[1],
  61                                value.bytes, value.packets);
  62                         key = next_key;
  63                 }
  64         }
  65         return 0;
  66 }