mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-08-19 07:07:08 +03:00
85f89d5d09
which can provide remote access to your device, even if the ip and firewall settings are broken git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13738 3c298f89-4303-0410-b956-a3cf2f4a3e73
55 lines
1.4 KiB
C
55 lines
1.4 KiB
C
/*
|
|
* Small pcap precompiler
|
|
* Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2
|
|
* as published by the Free Software Foundation
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/time.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <pcap.h>
|
|
|
|
int main (int argc, char ** argv)
|
|
{
|
|
struct bpf_program filter;
|
|
pcap_t *pc;
|
|
int i;
|
|
|
|
if (argc != 2)
|
|
{
|
|
printf ("Usage: %s <expression>\n", argv[0]);
|
|
return 1;
|
|
}
|
|
|
|
pc = pcap_open_dead(DLT_EN10MB, 1500);
|
|
if (pcap_compile(pc, &filter, argv[1], 1, 0) != 0) {
|
|
printf("error in active-filter expression: %s\n", pcap_geterr(pc));
|
|
return 1;
|
|
}
|
|
|
|
printf("/* precompiled expression: %s */\n\n"
|
|
"static struct bpf_insn pktfilter_insns[] = {\n",
|
|
argv[1]);
|
|
|
|
for (i = 0; i < filter.bf_len; i++) {
|
|
struct bpf_insn *in = &filter.bf_insns[i];
|
|
printf("\t{ .code = 0x%04x, .jt = 0x%02x, .jf = 0x%02x, .k = 0x%08x },\n", in->code, in->jt, in->jf, in->k);
|
|
}
|
|
printf("};\n\n"
|
|
"static struct bpf_program pktfilter = {\n"
|
|
"\t.bf_len = %d,\n"
|
|
"\t.bf_insns = pktfilter_insns,\n"
|
|
"};\n", filter.bf_len);
|
|
return 0;
|
|
|
|
}
|