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/* ebt_mark_m
*
* Authors:
* Bart De Schuymer <bdschuym@pandora.be>
*
* July, 2002
*
* Adapted by Arturo Borrero Gonzalez <arturo@debian.org>
* to use libxtables for ebtables-compat in 2015.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include <xtables.h>
#include <linux/netfilter_bridge/ebt_mark_m.h>
#define MARK '1'
static const struct option brmark_m_opts[] = {
{ .name = "mark", .has_arg = true, .val = MARK },
XT_GETOPT_TABLEEND,
};
static void brmark_m_print_help(void)
{
printf(
"mark option:\n"
"--mark [!] [value][/mask]: Match nfmask value (see man page)\n");
}
static void brmark_m_init(struct xt_entry_match *match)
{
struct ebt_mark_m_info *info = (struct ebt_mark_m_info *)match->data;
info->mark = 0;
info->mask = 0;
info->invert = 0;
info->bitmask = 0;
}
#define OPT_MARK 0x01
static int
brmark_m_parse(int c, char **argv, int invert, unsigned int *flags,
const void *entry, struct xt_entry_match **match)
{
struct ebt_mark_m_info *info = (struct ebt_mark_m_info *)
(*match)->data;
char *end;
switch (c) {
case MARK:
if (invert)
info->invert = 1;
info->mark = strtoul(optarg, &end, 0);
info->bitmask = EBT_MARK_AND;
if (*end == '/') {
if (end == optarg)
info->bitmask = EBT_MARK_OR;
info->mask = strtoul(end+1, &end, 0);
} else {
info->mask = 0xffffffff;
}
if (*end != '\0' || end == optarg)
xtables_error(PARAMETER_PROBLEM, "Bad mark value '%s'",
optarg);
break;
default:
return 0;
}
*flags |= info->bitmask;
return 1;
}
static void brmark_m_final_check(unsigned int flags)
{
if (!flags)
xtables_error(PARAMETER_PROBLEM,
"You must specify proper arguments");
}
static void brmark_m_print(const void *ip, const struct xt_entry_match *match,
int numeric)
{
struct ebt_mark_m_info *info = (struct ebt_mark_m_info *)match->data;
printf("--mark ");
if (info->invert)
printf("! ");
if (info->bitmask == EBT_MARK_OR)
printf("/0x%lx ", info->mask);
else if (info->mask != 0xffffffff)
printf("0x%lx/0x%lx ", info->mark, info->mask);
else
printf("0x%lx ", info->mark);
}
static int brmark_m_xlate(struct xt_xlate *xl,
const struct xt_xlate_mt_params *params)
{
const struct ebt_mark_m_info *info = (const void*)params->match->data;
enum xt_op op = XT_OP_EQ;
if (info->invert)
op = XT_OP_NEQ;
xt_xlate_add(xl, "meta mark ");
if (info->bitmask == EBT_MARK_OR) {
xt_xlate_add(xl, "and 0x%x %s0 ", info->mask,
info->invert ? "" : "!= ");
} else if (info->mask != 0xffffffffU) {
xt_xlate_add(xl, "and 0x%x %s0x%x ", info->mask,
op == XT_OP_EQ ? "" : "!= ", info->mark);
} else {
xt_xlate_add(xl, "%s0x%x ",
op == XT_OP_EQ ? "" : "!= ", info->mark);
}
return 1;
}
static struct xtables_match brmark_m_match = {
.name = "mark_m",
.revision = 0,
.version = XTABLES_VERSION,
.family = NFPROTO_BRIDGE,
.size = XT_ALIGN(sizeof(struct ebt_mark_m_info)),
.userspacesize = XT_ALIGN(sizeof(struct ebt_mark_m_info)),
.init = brmark_m_init,
.help = brmark_m_print_help,
.parse = brmark_m_parse,
.final_check = brmark_m_final_check,
.print = brmark_m_print,
.xlate = brmark_m_xlate,
.extra_opts = brmark_m_opts,
};
void _init(void)
{
xtables_register_match(&brmark_m_match);
}
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