release/src/router/xl2tpd/contrib/pfc.c

   1 /*
   2  * Taken from fli4l 3.0
   3  * Make sure you compile it against the same libpcap version used in OpenWrt
   4  */
   5
   6 #include <stdlib.h>
   7 #include <sys/types.h>
   8 #include <sys/time.h>
   9 #include <string.h>
  10
  11 #ifdef LINUX
  12 # include <linux/types.h>
  13 # include <linux/ppp_defs.h>
  14 # include <pcap-bpf.h>
  15 #endif
  16
  17 #ifdef OPENBSD
  18 # include <net/ppp_defs.h>
  19 #endif
  20
  21 #ifdef SOLARIS
  22 # include <net/ppp_defs.h>
  23 # define u_int32_t unsigned int
  24 #endif
  25
  26 #include <pcap.h>
  27
  28 int main (int argc, char ** argv)
  29 {
  30     pcap_t  *pc; /* Fake struct pcap so we can compile expr */
  31     struct  bpf_program filter; /* Filter program for link-active pkts */
  32     u_int32_t netmask=0;
  33
  34     int dflag = 3;
  35     if (argc == 4)
  36     {
  37         if (!strcmp (argv[1], "-d"))
  38         {
  39             dflag = atoi (argv[2]);
  40             argv += 2;
  41             argc -=2;
  42         }
  43     }
  44     if (argc != 2)
  45     {
  46         printf ("usage; %s [ -d <debug_level> ] expression\n", argv[0]);
  47         return 1;
  48     }
  49
  50     pc = pcap_open_dead(DLT_PPP_PPPD, PPP_HDRLEN);
  51     if (pcap_compile(pc, &filter, argv[1], 1, netmask) == 0)
  52     {
  53         printf ("#\n# Expression: %s\n#\n", argv[1]);
  54         bpf_dump (&filter, dflag);
  55         return 0;
  56     }
  57     else
  58     {
  59         printf("error in active-filter expression: %s\n", pcap_geterr(pc));
  60     }
  61     return 1;
  62 }