/usr/src/xtables-addons-2.6/extensions/libxt_ECHO.c is in xtables-addons-dkms 2.6-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | /*
* "ECHO" target extension for iptables
* Copyright © Jan Engelhardt, 2008
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License; either
* version 2 of the License, or any later version, as published by the
* Free Software Foundation.
*/
#include <stdio.h>
#include <getopt.h>
#include <xtables.h>
#include "compat_user.h"
static void echo_tg_help(void)
{
printf("ECHO takes no options\n\n");
}
static int echo_tg_parse(int c, char **argv, int invert, unsigned int *flags,
const void *entry, struct xt_entry_target **target)
{
return 0;
}
static void echo_tg_check(unsigned int flags)
{
}
static struct xtables_target echo_tg_reg = {
.version = XTABLES_VERSION,
.name = "ECHO",
.family = NFPROTO_UNSPEC,
.help = echo_tg_help,
.parse = echo_tg_parse,
.final_check = echo_tg_check,
};
static __attribute__((constructor)) void echo_tg_ldr(void)
{
xtables_register_target(&echo_tg_reg);
}
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