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/* 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 <xtables.h>
#include <linux/netfilter_bridge/ebt_802_3.h>
static const struct xt_option_entry br802_3_opts[] =
{
{ .name = "802_3-sap", .id = EBT_802_3_SAP,
.type = XTTYPE_UINT8, .base = 16,
.flags = XTOPT_INVERT | XTOPT_PUT,
XTOPT_POINTER(struct ebt_802_3_info, sap) },
{ .name = "802_3-type", .id = EBT_802_3_TYPE,
.type = XTTYPE_UINT16, .base = 16,
.flags = XTOPT_INVERT | XTOPT_PUT | XTOPT_NBO,
XTOPT_POINTER(struct ebt_802_3_info, type) },
XTOPT_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_parse(struct xt_option_call *cb)
{
struct ebt_802_3_info *info = cb->data;
xtables_option_parse(cb);
info->bitmask |= cb->entry->id;
if (cb->invert)
info->invflags |= cb->entry->id;
}
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 0x%.2x ", info->sap);
}
if (info->bitmask & EBT_802_3_TYPE) {
if (info->invflags & EBT_802_3_TYPE)
printf("! ");
printf("--802_3-type 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)),
.help = br802_3_print_help,
.x6_parse = br802_3_parse,
.print = br802_3_print,
.x6_options = br802_3_opts,
};
void _init(void)
{
xtables_register_match(&br802_3_match);
}
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