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Linux/samples/bpf/sockex2_user.c

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  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 }
 54 

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