/* 802_3

 *

 * Author:

 * Chris Vitale <csv@bluetail.com>

 *

 * May 2003

 *

 * Adapted by Arturo Borrero Gonzalez <arturo@debian.org>

 * to use libxtables for ebtables-compat

 */

#include <stdbool.h>

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#include <getopt.h>

#include <xtables.h>

#include <linux/netfilter_bridge/ebt_802_3.h>

#define _802_3_SAP	'1'

#define _802_3_TYPE	'2'

static const struct option br802_3_opts[] = {

	{ .name = "802_3-sap",	.has_arg = true, .val = _802_3_SAP },

	{ .name = "802_3-type",	.has_arg = true, .val = _802_3_TYPE },

	XT_GETOPT_TABLEEND,

};

static void br802_3_print_help(void)

{

	printf(

"802_3 options:\n"

"--802_3-sap [!] protocol       : 802.3 DSAP/SSAP- 1 byte value (hex)\n"

"  DSAP and SSAP are always the same.  One SAP applies to both fields\n"

"--802_3-type [!] protocol      : 802.3 SNAP Type- 2 byte value (hex)\n"

"  Type implies SAP value 0xaa\n");

}

static void br802_3_init(struct xt_entry_match *match)

{

	struct ebt_802_3_info *info = (struct ebt_802_3_info *)match->data;

	info->invflags = 0;

	info->bitmask = 0;

}

static int

br802_3_parse(int c, char **argv, int invert, unsigned int *flags,

	      const void *entry, struct xt_entry_match **match)

{

	struct ebt_802_3_info *info = (struct ebt_802_3_info *) (*match)->data;

	unsigned int i;

	char *end;

	switch (c) {

	case _802_3_SAP:

		if (invert)

			info->invflags |= EBT_802_3_SAP;

		i = strtoul(optarg, &end, 16);

		if (i > 255 || *end != '\0')

			xtables_error(PARAMETER_PROBLEM,

				      "Problem with specified "

					"sap hex value, %x",i);

		info->sap = i; /* one byte, so no byte order worries */

		info->bitmask |= EBT_802_3_SAP;

		break;

	case _802_3_TYPE:

		if (invert)

			info->invflags |= EBT_802_3_TYPE;

		i = strtoul(optarg, &end, 16);

		if (i > 65535 || *end != '\0') {

			xtables_error(PARAMETER_PROBLEM,

				      "Problem with the specified "

					"type hex value, %x",i);

		}

		info->type = htons(i);

		info->bitmask |= EBT_802_3_TYPE;

		break;

	default:

		return 0;

	}

	*flags |= info->bitmask;

	return 1;

}

static void

br802_3_final_check(unsigned int flags)

{

	if (!flags)

		xtables_error(PARAMETER_PROBLEM,

			      "You must specify proper arguments");

}

static void br802_3_print(const void *ip, const struct xt_entry_match *match,

			  int numeric)

{

	struct ebt_802_3_info *info = (struct ebt_802_3_info *)match->data;

	if (info->bitmask & EBT_802_3_SAP) {

		if (info->invflags & EBT_802_3_SAP)

			printf("! ");

		printf("--802_3-sap ");

		printf("0x%.2x ", info->sap);

	}

	if (info->bitmask & EBT_802_3_TYPE) {

		if (info->invflags & EBT_802_3_TYPE)

			printf("! ");

		printf("--802_3-type ");

		printf("0x%.4x ", ntohs(info->type));

	}

}

static struct xtables_match br802_3_match =

{

	.name		= "802_3",

	.revision	= 0,

	.version	= XTABLES_VERSION,

	.family		= NFPROTO_BRIDGE,

	.size		= XT_ALIGN(sizeof(struct ebt_802_3_info)),

	.userspacesize	= XT_ALIGN(sizeof(struct ebt_802_3_info)),

	.init		= br802_3_init,

	.help		= br802_3_print_help,

	.parse		= br802_3_parse,

	.final_check	= br802_3_final_check,

	.print		= br802_3_print,

	.extra_opts	= br802_3_opts,

};

void _init(void)

{

	xtables_register_match(&br802_3_match);

}