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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 <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 bytes\n",
 44                        tcp_cnt, udp_cnt, icmp_cnt);
 45                 sleep(1);
 46         }
 47 
 48         return 0;
 49 }
 50 

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