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#include <stdbool.h>
#include <stdio.h>
#include <xtables.h>
#include <linux/netfilter/xt_MARK.h>
/* Version 0 */
struct xt_mark_target_info {
unsigned long mark;
};
/* Version 1 */
enum {
XT_MARK_SET=0,
XT_MARK_AND,
XT_MARK_OR,
};
struct xt_mark_target_info_v1 {
unsigned long mark;
uint8_t mode;
};
enum {
O_SET_MARK = 0,
O_AND_MARK,
O_OR_MARK,
O_XOR_MARK,
O_SET_XMARK,
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_SET_XMARK = 1 << O_SET_XMARK,
F_ANY = F_SET_MARK | F_AND_MARK | F_OR_MARK |
F_XOR_MARK | F_SET_XMARK,
};
static void MARK_help(void)
{
printf(
"MARK target options:\n"
" --set-mark value Set nfmark value\n"
" --and-mark value Binary AND the nfmark with value\n"
" --or-mark value Binary OR the nfmark with value\n");
}
static const struct xt_option_entry MARK_opts[] = {
{.name = "set-mark", .id = O_SET_MARK, .type = XTTYPE_UINT32,
.excl = F_ANY},
{.name = "and-mark", .id = O_AND_MARK, .type = XTTYPE_UINT32,
.excl = F_ANY},
{.name = "or-mark", .id = O_OR_MARK, .type = XTTYPE_UINT32,
.excl = F_ANY},
XTOPT_TABLEEND,
};
static const struct xt_option_entry mark_tg_opts[] = {
{.name = "set-xmark", .id = O_SET_XMARK, .type = XTTYPE_MARKMASK32,
.excl = F_ANY},
{.name = "set-mark", .id = O_SET_MARK, .type = XTTYPE_MARKMASK32,
.excl = F_ANY},
{.name = "and-mark", .id = O_AND_MARK, .type = XTTYPE_UINT32,
.excl = F_ANY},
{.name = "or-mark", .id = O_OR_MARK, .type = XTTYPE_UINT32,
.excl = F_ANY},
{.name = "xor-mark", .id = O_XOR_MARK, .type = XTTYPE_UINT32,
.excl = F_ANY},
XTOPT_TABLEEND,
};
static void mark_tg_help(void)
{
printf(
"MARK target options:\n"
" --set-xmark value[/mask] Clear bits in mask and XOR value into nfmark\n"
" --set-mark value[/mask] Clear bits in mask and OR value into nfmark\n"
" --and-mark bits Binary AND the nfmark with bits\n"
" --or-mark bits Binary OR the nfmark with bits\n"
" --xor-mark bits Binary XOR the nfmark with bits\n"
"\n");
}
static void MARK_parse_v0(struct xt_option_call *cb)
{
struct xt_mark_target_info *markinfo = cb->data;
xtables_option_parse(cb);
switch (cb->entry->id) {
case O_SET_MARK:
markinfo->mark = cb->val.mark;
break;
default:
xtables_error(PARAMETER_PROBLEM,
"MARK target: kernel too old for --%s",
cb->entry->name);
}
}
static void MARK_check(struct xt_fcheck_call *cb)
{
if (cb->xflags == 0)
xtables_error(PARAMETER_PROBLEM,
"MARK target: Parameter --set/and/or-mark"
" is required");
}
static void MARK_parse_v1(struct xt_option_call *cb)
{
struct xt_mark_target_info_v1 *markinfo = cb->data;
xtables_option_parse(cb);
switch (cb->entry->id) {
case O_SET_MARK:
markinfo->mode = XT_MARK_SET;
break;
case O_AND_MARK:
markinfo->mode = XT_MARK_AND;
break;
case O_OR_MARK:
markinfo->mode = XT_MARK_OR;
break;
}
markinfo->mark = cb->val.u32;
}
static void mark_tg_parse(struct xt_option_call *cb)
{
struct xt_mark_tginfo2 *info = cb->data;
xtables_option_parse(cb);
switch (cb->entry->id) {
case O_SET_XMARK:
info->mark = cb->val.mark;
info->mask = cb->val.mask;
break;
case O_SET_MARK:
info->mark = cb->val.mark;
info->mask = cb->val.mark | cb->val.mask;
break;
case O_AND_MARK:
info->mark = 0;
info->mask = ~cb->val.u32;
break;
case O_OR_MARK:
info->mark = info->mask = cb->val.u32;
break;
case O_XOR_MARK:
info->mark = cb->val.u32;
info->mask = 0;
break;
}
}
static void mark_tg_check(struct xt_fcheck_call *cb)
{
if (cb->xflags == 0)
xtables_error(PARAMETER_PROBLEM, "MARK: One of the --set-xmark, "
"--{and,or,xor,set}-mark options is required");
}
static void
print_mark(unsigned long mark)
{
printf(" 0x%lx", mark);
}
static void MARK_print_v0(const void *ip,
const struct xt_entry_target *target, int numeric)
{
const struct xt_mark_target_info *markinfo =
(const struct xt_mark_target_info *)target->data;
printf(" MARK set");
print_mark(markinfo->mark);
}
static void MARK_save_v0(const void *ip, const struct xt_entry_target *target)
{
const struct xt_mark_target_info *markinfo =
(const struct xt_mark_target_info *)target->data;
printf(" --set-mark");
print_mark(markinfo->mark);
}
static void MARK_print_v1(const void *ip, const struct xt_entry_target *target,
int numeric)
{
const struct xt_mark_target_info_v1 *markinfo =
(const struct xt_mark_target_info_v1 *)target->data;
switch (markinfo->mode) {
case XT_MARK_SET:
printf(" MARK set");
break;
case XT_MARK_AND:
printf(" MARK and");
break;
case XT_MARK_OR:
printf(" MARK or");
break;
}
print_mark(markinfo->mark);
}
static void mark_tg_print(const void *ip, const struct xt_entry_target *target,
int numeric)
{
const struct xt_mark_tginfo2 *info = (const void *)target->data;
if (info->mark == 0)
printf(" MARK and 0x%x", (unsigned int)(uint32_t)~info->mask);
else if (info->mark == info->mask)
printf(" MARK or 0x%x", info->mark);
else if (info->mask == 0)
printf(" MARK xor 0x%x", info->mark);
else if (info->mask == 0xffffffffU)
printf(" MARK set 0x%x", info->mark);
else
printf(" MARK xset 0x%x/0x%x", info->mark, info->mask);
}
static void MARK_save_v1(const void *ip, const struct xt_entry_target *target)
{
const struct xt_mark_target_info_v1 *markinfo =
(const struct xt_mark_target_info_v1 *)target->data;
switch (markinfo->mode) {
case XT_MARK_SET:
printf(" --set-mark");
break;
case XT_MARK_AND:
printf(" --and-mark");
break;
case XT_MARK_OR:
printf(" --or-mark");
break;
}
print_mark(markinfo->mark);
}
static void mark_tg_save(const void *ip, const struct xt_entry_target *target)
{
const struct xt_mark_tginfo2 *info = (const void *)target->data;
printf(" --set-xmark 0x%x/0x%x", info->mark, info->mask);
}
static int mark_tg_xlate(struct xt_xlate *xl,
const struct xt_xlate_tg_params *params)
{
const struct xt_mark_tginfo2 *info = (const void *)params->target->data;
xt_xlate_add(xl, "meta mark set ");
if (info->mask == 0xffffffffU)
xt_xlate_add(xl, "0x%x ", info->mark);
else if (info->mark == 0)
xt_xlate_add(xl, "mark and 0x%x ", ~info->mask);
else if (info->mark == info->mask)
xt_xlate_add(xl, "mark or 0x%x ", info->mark);
else if (info->mask == 0)
xt_xlate_add(xl, "mark xor 0x%x ", info->mark);
else
xt_xlate_add(xl, "mark and 0x%x xor 0x%x ", ~info->mask,
info->mark);
return 1;
}
static int MARK_xlate(struct xt_xlate *xl,
const struct xt_xlate_tg_params *params)
{
const struct xt_mark_target_info_v1 *markinfo =
(const struct xt_mark_target_info_v1 *)params->target->data;
xt_xlate_add(xl, "meta mark set ");
switch(markinfo->mode) {
case XT_MARK_SET:
xt_xlate_add(xl, "0x%x ", markinfo->mark);
break;
case XT_MARK_AND:
xt_xlate_add(xl, "mark and 0x%x ", markinfo->mark);
break;
case XT_MARK_OR:
xt_xlate_add(xl, "mark or 0x%x ", markinfo->mark);
break;
}
return 1;
}
static struct xtables_target mark_tg_reg[] = {
{
.family = NFPROTO_UNSPEC,
.name = "MARK",
.version = XTABLES_VERSION,
.revision = 0,
.size = XT_ALIGN(sizeof(struct xt_mark_target_info)),
.userspacesize = XT_ALIGN(sizeof(struct xt_mark_target_info)),
.help = MARK_help,
.print = MARK_print_v0,
.save = MARK_save_v0,
.x6_parse = MARK_parse_v0,
.x6_fcheck = MARK_check,
.x6_options = MARK_opts,
},
{
.family = NFPROTO_IPV4,
.name = "MARK",
.version = XTABLES_VERSION,
.revision = 1,
.size = XT_ALIGN(sizeof(struct xt_mark_target_info_v1)),
.userspacesize = XT_ALIGN(sizeof(struct xt_mark_target_info_v1)),
.help = MARK_help,
.print = MARK_print_v1,
.save = MARK_save_v1,
.x6_parse = MARK_parse_v1,
.x6_fcheck = MARK_check,
.x6_options = MARK_opts,
.xlate = MARK_xlate,
},
{
.version = XTABLES_VERSION,
.name = "MARK",
.revision = 2,
.family = NFPROTO_UNSPEC,
.size = XT_ALIGN(sizeof(struct xt_mark_tginfo2)),
.userspacesize = XT_ALIGN(sizeof(struct xt_mark_tginfo2)),
.help = mark_tg_help,
.print = mark_tg_print,
.save = mark_tg_save,
.x6_parse = mark_tg_parse,
.x6_fcheck = mark_tg_check,
.x6_options = mark_tg_opts,
.xlate = mark_tg_xlate,
},
};
void _init(void)
{
xtables_register_targets(mark_tg_reg, ARRAY_SIZE(mark_tg_reg));
}
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