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/*
* Taken from fli4l 3.0
* Make sure you compile it against the same libpcap version used in OpenWrt
*/
#include <stdlib.h>
#include <sys/types.h>
#include <sys/time.h>
#include <string.h>
#include <linux/types.h>
#include <linux/ppp_defs.h>
#include <pcap.h>
#include <pcap-bpf.h>
int main (int argc, char ** argv)
{
pcap_t *pc; /* Fake struct pcap so we can compile expr */
struct bpf_program filter; /* Filter program for link-active pkts */
u_int32_t netmask=0;
int dflag = 3;
if (argc == 4)
{
if (!strcmp (argv[1], "-d"))
{
dflag = atoi (argv[2]);
argv += 2;
argc -=2;
}
}
if (argc != 2)
{
printf ("usage; %s [ -d <debug_level> ] expression\n", argv[0]);
return 1;
}
pc = pcap_open_dead(DLT_PPP_PPPD, PPP_HDRLEN);
if (pcap_compile(pc, &filter, argv[1], 1, netmask) == 0)
{
printf ("#\n# Expression: %s\n#\n", argv[1]);
bpf_dump (&filter, dflag);
return 0;
}
else
{
printf("error in active-filter expression: %s\n", pcap_geterr(pc));
}
return 1;
}
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