/usr/src/xtables-addons-2.12/extensions/libxt_quota2.c is in xtables-addons-dkms 2.12-0.1.
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 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 | /*
* "quota2" match extension for iptables
* Sam Johnston <samj [at] samj net>
* 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 <getopt.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <xtables.h>
#include "xt_quota2.h"
#include "compat_user.h"
enum {
FL_QUOTA = 1 << 0,
FL_NAME = 1 << 1,
FL_GROW = 1 << 2,
FL_PACKET = 1 << 3,
FL_NO_CHANGE = 1 << 4,
};
static const struct option quota_mt2_opts[] = {
{.name = "grow", .has_arg = false, .val = 'g'},
{.name = "no-change", .has_arg = false, .val = 'c'},
{.name = "name", .has_arg = true, .val = 'n'},
{.name = "quota", .has_arg = true, .val = 'q'},
{.name = "packets", .has_arg = false, .val = 'p'},
{NULL},
};
static void quota_mt2_help(void)
{
printf(
"quota match options:\n"
" --grow provide an increasing counter\n"
" --no-change never change counter/quota value for matching packets\n"
" --name name name for the file in sysfs\n"
"[!] --quota quota initial quota (bytes or packets)\n"
" --packets count packets instead of bytes\n"
);
}
static int
quota_mt2_parse(int c, char **argv, int invert, unsigned int *flags,
const void *entry, struct xt_entry_match **match)
{
struct xt_quota_mtinfo2 *info = (void *)(*match)->data;
char *end;
switch (c) {
case 'g':
xtables_param_act(XTF_ONLY_ONCE, "quota", "--grow", *flags & FL_GROW);
xtables_param_act(XTF_NO_INVERT, "quota", "--grow", invert);
info->flags |= XT_QUOTA_GROW;
*flags |= FL_GROW;
return true;
case 'c': /* no-change */
xtables_param_act(XTF_ONLY_ONCE, "quota", "--no-change", *flags & FL_NO_CHANGE);
xtables_param_act(XTF_NO_INVERT, "quota", "--no-change", invert);
info->flags |= XT_QUOTA_NO_CHANGE;
*flags |= FL_NO_CHANGE;
return true;
case 'n':
/* zero termination done on behalf of the kernel module */
xtables_param_act(XTF_ONLY_ONCE, "quota", "--name", *flags & FL_NAME);
xtables_param_act(XTF_NO_INVERT, "quota", "--name", invert);
strncpy(info->name, optarg, sizeof(info->name));
*flags |= FL_NAME;
return true;
case 'p':
xtables_param_act(XTF_ONLY_ONCE, "quota", "--packets", *flags & FL_PACKET);
xtables_param_act(XTF_NO_INVERT, "quota", "--packets", invert);
info->flags |= XT_QUOTA_PACKET;
*flags |= FL_PACKET;
return true;
case 'q':
xtables_param_act(XTF_ONLY_ONCE, "quota", "--quota", *flags & FL_QUOTA);
if (invert)
info->flags |= XT_QUOTA_INVERT;
info->quota = strtoull(optarg, &end, 0);
if (*end != '\0')
xtables_error(PARAMETER_PROBLEM, "quota match: "
"invalid value for --quota");
*flags |= FL_QUOTA;
return true;
}
return false;
}
static void
quota_mt2_save(const void *ip, const struct xt_entry_match *match)
{
const struct xt_quota_mtinfo2 *q = (void *)match->data;
if (q->flags & XT_QUOTA_GROW)
printf(" --grow ");
if (q->flags & XT_QUOTA_NO_CHANGE)
printf(" --no-change ");
if (q->flags & XT_QUOTA_PACKET)
printf(" --packets ");
if (*q->name != '\0')
printf(" --name %s ", q->name);
if (q->flags & XT_QUOTA_INVERT)
printf(" !");
printf(" --quota %llu ", (unsigned long long)q->quota);
}
static void quota_mt2_print(const void *ip, const struct xt_entry_match *match,
int numeric)
{
printf(" -m quota");
quota_mt2_save(ip, match);
}
static struct xtables_match quota_mt2_reg = {
.family = NFPROTO_UNSPEC,
.revision = 3,
.name = "quota2",
.version = XTABLES_VERSION,
.size = XT_ALIGN(sizeof (struct xt_quota_mtinfo2)),
.userspacesize = offsetof(struct xt_quota_mtinfo2, quota),
.help = quota_mt2_help,
.parse = quota_mt2_parse,
.print = quota_mt2_print,
.save = quota_mt2_save,
.extra_opts = quota_mt2_opts,
};
static __attribute__((constructor)) void quota2_mt_ldr(void)
{
xtables_register_match("a_mt2_reg);
}
|