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Linux/samples/bpf/sockex1_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 
 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 }
 51 

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