/* Shared library add-on to xtables for AUDIT

 *

 * (C) 2010-2011, Thomas Graf <tgraf@redhat.com>

 * (C) 2010-2011, Red Hat, Inc.

 *

 * This program is distributed under the terms of GNU GPL v2, 1991

 */

#include <stdio.h>

#include <string.h>

#include <xtables.h>

#include <linux/netfilter/xt_AUDIT.h>

enum {

	O_AUDIT_TYPE = 0,

};

static void audit_help(void)

{

	printf(

"AUDIT target options\n"

"  --type TYPE		Action type to be recorded.\n");

}

static const struct xt_option_entry audit_opts[] = {

	{.name = "type", .id = O_AUDIT_TYPE, .type = XTTYPE_STRING,

	 .flags = XTOPT_MAND},

	XTOPT_TABLEEND,

};

static void audit_parse(struct xt_option_call *cb)

{

	struct xt_audit_info *einfo = cb->data;

	xtables_option_parse(cb);

	if (strcasecmp(cb->arg, "accept") == 0)

		einfo->type = XT_AUDIT_TYPE_ACCEPT;

	else if (strcasecmp(cb->arg, "drop") == 0)

		einfo->type = XT_AUDIT_TYPE_DROP;

	else if (strcasecmp(cb->arg, "reject") == 0)

		einfo->type = XT_AUDIT_TYPE_REJECT;

	else

		xtables_error(PARAMETER_PROBLEM,

			   "Bad action type value \"%s\"", cb->arg);

}

static void audit_print(const void *ip, const struct xt_entry_target *target,

                      int numeric)

{

	const struct xt_audit_info *einfo =

		(const struct xt_audit_info *)target->data;

	printf(" AUDIT ");

	switch(einfo->type) {

	case XT_AUDIT_TYPE_ACCEPT:

		printf("accept");

		break;

	case XT_AUDIT_TYPE_DROP:

		printf("drop");

		break;

	case XT_AUDIT_TYPE_REJECT:

		printf("reject");

		break;

	}

}

static void audit_save(const void *ip, const struct xt_entry_target *target)

{

	const struct xt_audit_info *einfo =

		(const struct xt_audit_info *)target->data;

	switch(einfo->type) {

	case XT_AUDIT_TYPE_ACCEPT:

		printf(" --type accept");

		break;

	case XT_AUDIT_TYPE_DROP:

		printf(" --type drop");

		break;

	case XT_AUDIT_TYPE_REJECT:

		printf(" --type reject");

		break;

	}

}

static int audit_xlate(struct xt_xlate *xl,

		       const struct xt_xlate_tg_params *params)

{

	/* audit type is merely sanity checked by xt_AUDIT.ko,

	 * so nftables doesn't even support it */

	xt_xlate_add(xl, "log level audit");

	return 1;

}

static struct xtables_target audit_tg_reg = {

	.name		= "AUDIT",

	.version	= XTABLES_VERSION,

	.family		= NFPROTO_UNSPEC,

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

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

	.help		= audit_help,

	.print		= audit_print,

	.save		= audit_save,

	.x6_parse	= audit_parse,

	.x6_options	= audit_opts,

	.xlate		= audit_xlate,

};

void _init(void)

{

	xtables_register_target(&audit_tg_reg);

}