1#include <stdio.h>
2#include <xtables.h>
3#include <linux/netfilter/xt_cpu.h>
4
5enum {
6	O_CPU = 0,
7};
8
9static void cpu_help(void)
10{
11	printf(
12"cpu match options:\n"
13"[!] --cpu number   Match CPU number\n");
14}
15
16static const struct xt_option_entry cpu_opts[] = {
17	{.name = "cpu", .id = O_CPU, .type = XTTYPE_UINT32,
18	 .flags = XTOPT_INVERT | XTOPT_MAND | XTOPT_PUT,
19	 XTOPT_POINTER(struct xt_cpu_info, cpu)},
20	XTOPT_TABLEEND,
21};
22
23static void cpu_parse(struct xt_option_call *cb)
24{
25	struct xt_cpu_info *cpuinfo = cb->data;
26
27	xtables_option_parse(cb);
28	if (cb->invert)
29		cpuinfo->invert = true;
30}
31
32static void
33cpu_print(const void *ip, const struct xt_entry_match *match, int numeric)
34{
35	const struct xt_cpu_info *info = (void *)match->data;
36
37	printf(" cpu %s%u", info->invert ? "! ":"", info->cpu);
38}
39
40static void cpu_save(const void *ip, const struct xt_entry_match *match)
41{
42	const struct xt_cpu_info *info = (void *)match->data;
43
44	printf("%s --cpu %u", info->invert ? " !" : "", info->cpu);
45}
46
47static struct xtables_match cpu_match = {
48	.family		= NFPROTO_UNSPEC,
49 	.name		= "cpu",
50	.version	= XTABLES_VERSION,
51	.size		= XT_ALIGN(sizeof(struct xt_cpu_info)),
52	.userspacesize	= XT_ALIGN(sizeof(struct xt_cpu_info)),
53	.help		= cpu_help,
54	.print		= cpu_print,
55	.save		= cpu_save,
56	.x6_parse	= cpu_parse,
57	.x6_options	= cpu_opts,
58};
59
60void _init(void)
61{
62	xtables_register_match(&cpu_match);
63}
64