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/* ebt_mark
*
* Authors:
* Bart De Schuymer <bdschuym@pandora.be>
*
* July, 2002, September 2006
*
* 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 <xtables.h>
#include <linux/netfilter_bridge/ebt_mark_t.h>
#include "iptables/nft.h"
#include "iptables/nft-bridge.h"
enum {
O_SET_MARK = 0,
O_AND_MARK,
O_OR_MARK,
O_XOR_MARK,
O_MARK_TARGET,
F_SET_MARK = 1 << O_SET_MARK,
F_AND_MARK = 1 << O_AND_MARK,
F_OR_MARK = 1 << O_OR_MARK,
F_XOR_MARK = 1 << O_XOR_MARK,
F_ANY = F_SET_MARK | F_AND_MARK | F_OR_MARK | F_XOR_MARK,
};
static const struct xt_option_entry brmark_opts[] = {
{ .name = "mark-target",.id = O_MARK_TARGET, .type = XTTYPE_STRING },
/* an oldtime messup, we should have always used the scheme
* <extension-name>-<option> */
{ .name = "set-mark", .id = O_SET_MARK, .type = XTTYPE_UINT32,
.excl = F_ANY },
{ .name = "mark-set", .id = O_SET_MARK, .type = XTTYPE_UINT32,
.excl = F_ANY },
{ .name = "mark-or", .id = O_OR_MARK, .type = XTTYPE_UINT32,
.excl = F_ANY },
{ .name = "mark-and", .id = O_AND_MARK, .type = XTTYPE_UINT32,
.excl = F_ANY },
{ .name = "mark-xor", .id = O_XOR_MARK, .type = XTTYPE_UINT32,
.excl = F_ANY },
XTOPT_TABLEEND,
};
static void brmark_print_help(void)
{
printf(
"mark target options:\n"
" --mark-set value : Set nfmark value\n"
" --mark-or value : Or nfmark with value (nfmark |= value)\n"
" --mark-and value : And nfmark with value (nfmark &= value)\n"
" --mark-xor value : Xor nfmark with value (nfmark ^= value)\n"
" --mark-target target : ACCEPT, DROP, RETURN or CONTINUE\n");
}
static void brmark_init(struct xt_entry_target *target)
{
struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)target->data;
info->target = EBT_ACCEPT;
info->mark = 0;
}
static void brmark_parse(struct xt_option_call *cb)
{
static const unsigned long target_orval[] = {
[O_SET_MARK] = MARK_SET_VALUE,
[O_AND_MARK] = MARK_AND_VALUE,
[O_OR_MARK] = MARK_OR_VALUE,
[O_XOR_MARK] = MARK_XOR_VALUE,
};
struct ebt_mark_t_info *info = cb->data;
unsigned int tmp;
xtables_option_parse(cb);
switch (cb->entry->id) {
case O_MARK_TARGET:
if (ebt_fill_target(cb->arg, &tmp))
xtables_error(PARAMETER_PROBLEM,
"Illegal --mark-target target");
/* the 4 lsb are left to designate the target */
info->target = (info->target & ~EBT_VERDICT_BITS) |
(tmp & EBT_VERDICT_BITS);
return;
case O_SET_MARK:
case O_OR_MARK:
case O_AND_MARK:
case O_XOR_MARK:
break;
default:
return;
}
/* mutual code */
info->mark = cb->val.u32;
info->target = (info->target & EBT_VERDICT_BITS) |
target_orval[cb->entry->id];
}
static void brmark_print(const void *ip, const struct xt_entry_target *target,
int numeric)
{
struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)target->data;
int tmp;
tmp = info->target & ~EBT_VERDICT_BITS;
if (tmp == MARK_SET_VALUE)
printf("--mark-set");
else if (tmp == MARK_OR_VALUE)
printf("--mark-or");
else if (tmp == MARK_XOR_VALUE)
printf("--mark-xor");
else if (tmp == MARK_AND_VALUE)
printf("--mark-and");
else
xtables_error(PARAMETER_PROBLEM, "Unknown mark action");
printf(" 0x%lx", info->mark);
tmp = info->target | ~EBT_VERDICT_BITS;
printf(" --mark-target %s", ebt_target_name(tmp));
}
static void brmark_final_check(struct xt_fcheck_call *fc)
{
if (!fc->xflags)
xtables_error(PARAMETER_PROBLEM,
"You must specify some option");
}
static const char* brmark_verdict(int verdict)
{
switch (verdict) {
case EBT_ACCEPT: return "accept";
case EBT_DROP: return "drop";
case EBT_CONTINUE: return "continue";
case EBT_RETURN: return "return";
}
return "";
}
static int brmark_xlate(struct xt_xlate *xl,
const struct xt_xlate_tg_params *params)
{
const struct ebt_mark_t_info *info = (const void*)params->target->data;
int tmp;
tmp = info->target & ~EBT_VERDICT_BITS;
xt_xlate_add(xl, "meta mark set ");
switch (tmp) {
case MARK_SET_VALUE:
break;
case MARK_OR_VALUE:
xt_xlate_add(xl, "meta mark or ");
break;
case MARK_XOR_VALUE:
xt_xlate_add(xl, "meta mark xor ");
break;
case MARK_AND_VALUE:
xt_xlate_add(xl, "meta mark and ");
break;
default:
return 0;
}
tmp = info->target | ~EBT_VERDICT_BITS;
xt_xlate_add(xl, "0x%lx %s ", info->mark, brmark_verdict(tmp));
return 1;
}
static struct xtables_target brmark_target = {
.name = "mark",
.revision = 0,
.version = XTABLES_VERSION,
.family = NFPROTO_BRIDGE,
.size = XT_ALIGN(sizeof(struct ebt_mark_t_info)),
.userspacesize = XT_ALIGN(sizeof(struct ebt_mark_t_info)),
.help = brmark_print_help,
.init = brmark_init,
.x6_parse = brmark_parse,
.x6_fcheck = brmark_final_check,
.print = brmark_print,
.xlate = brmark_xlate,
.x6_options = brmark_opts,
};
void _init(void)
{
xtables_register_target(&brmark_target);
}
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