#include <stdio.h>

#include <xtables.h>

#include <linux/netfilter/xt_cpu.h>

enum {

	O_CPU = 0,

};

static void cpu_help(void)

{

	printf(

"cpu match options:\n"

"[!] --cpu number   Match CPU number\n");

}

static const struct xt_option_entry cpu_opts[] = {

	{.name = "cpu", .id = O_CPU, .type = XTTYPE_UINT32,

	 .flags = XTOPT_INVERT | XTOPT_MAND | XTOPT_PUT,

	 XTOPT_POINTER(struct xt_cpu_info, cpu)},

	XTOPT_TABLEEND,

};

static void cpu_parse(struct xt_option_call *cb)

{

	struct xt_cpu_info *cpuinfo = cb->data;

	xtables_option_parse(cb);

	if (cb->invert)

		cpuinfo->invert = true;

}

static void

cpu_print(const void *ip, const struct xt_entry_match *match, int numeric)

{

	const struct xt_cpu_info *info = (void *)match->data;

	printf(" cpu %s%u", info->invert ? "! ":"", info->cpu);

}

static void cpu_save(const void *ip, const struct xt_entry_match *match)

{

	const struct xt_cpu_info *info = (void *)match->data;

	printf("%s --cpu %u", info->invert ? " !" : "", info->cpu);

}

static int cpu_xlate(struct xt_xlate *xl,

		     const struct xt_xlate_mt_params *params)

{

	const struct xt_cpu_info *info = (void *)params->match->data;

	xt_xlate_add(xl, "cpu%s %u", info->invert ? " !=" : "", info->cpu);

	return 1;

}

static struct xtables_match cpu_match = {

	.family		= NFPROTO_UNSPEC,

	.name		= "cpu",

	.version	= XTABLES_VERSION,

	.size		= XT_ALIGN(sizeof(struct xt_cpu_info)),

	.userspacesize	= XT_ALIGN(sizeof(struct xt_cpu_info)),

	.help		= cpu_help,

	.print		= cpu_print,

	.save		= cpu_save,

	.x6_parse	= cpu_parse,

	.x6_options	= cpu_opts,

	.xlate		= cpu_xlate,

};

void _init(void)

{

	xtables_register_match(&cpu_match);

}