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#include <stdio.h>
#include <xtables.h>
#include <linux/netfilter/xt_physdev.h>
enum {
O_PHYSDEV_IN = 0,
O_PHYSDEV_OUT,
O_PHYSDEV_IS_IN,
O_PHYSDEV_IS_OUT,
O_PHYSDEV_IS_BRIDGED,
};
static void physdev_help(void)
{
printf(
"physdev match options:\n"
" [!] --physdev-in inputname[+] bridge port name ([+] for wildcard)\n"
" [!] --physdev-out outputname[+] bridge port name ([+] for wildcard)\n"
" [!] --physdev-is-in arrived on a bridge device\n"
" [!] --physdev-is-out will leave on a bridge device\n"
" [!] --physdev-is-bridged it's a bridged packet\n");
}
#define s struct xt_physdev_info
static const struct xt_option_entry physdev_opts[] = {
{.name = "physdev-in", .id = O_PHYSDEV_IN, .type = XTTYPE_STRING,
.flags = XTOPT_INVERT | XTOPT_PUT, XTOPT_POINTER(s, physindev)},
{.name = "physdev-out", .id = O_PHYSDEV_OUT, .type = XTTYPE_STRING,
.flags = XTOPT_INVERT | XTOPT_PUT, XTOPT_POINTER(s, physoutdev)},
{.name = "physdev-is-in", .id = O_PHYSDEV_IS_IN, .type = XTTYPE_NONE,
.flags = XTOPT_INVERT},
{.name = "physdev-is-out", .id = O_PHYSDEV_IS_OUT,
.type = XTTYPE_NONE, .flags = XTOPT_INVERT},
{.name = "physdev-is-bridged", .id = O_PHYSDEV_IS_BRIDGED,
.type = XTTYPE_NONE, .flags = XTOPT_INVERT},
XTOPT_TABLEEND,
};
#undef s
static void physdev_parse(struct xt_option_call *cb)
{
struct xt_physdev_info *info = cb->data;
xtables_option_parse(cb);
switch (cb->entry->id) {
case O_PHYSDEV_IN:
xtables_parse_interface(cb->arg, info->physindev,
(unsigned char *)info->in_mask);
if (cb->invert)
info->invert |= XT_PHYSDEV_OP_IN;
info->bitmask |= XT_PHYSDEV_OP_IN;
break;
case O_PHYSDEV_OUT:
xtables_parse_interface(cb->arg, info->physoutdev,
(unsigned char *)info->out_mask);
if (cb->invert)
info->invert |= XT_PHYSDEV_OP_OUT;
info->bitmask |= XT_PHYSDEV_OP_OUT;
break;
case O_PHYSDEV_IS_IN:
info->bitmask |= XT_PHYSDEV_OP_ISIN;
if (cb->invert)
info->invert |= XT_PHYSDEV_OP_ISIN;
break;
case O_PHYSDEV_IS_OUT:
info->bitmask |= XT_PHYSDEV_OP_ISOUT;
if (cb->invert)
info->invert |= XT_PHYSDEV_OP_ISOUT;
break;
case O_PHYSDEV_IS_BRIDGED:
if (cb->invert)
info->invert |= XT_PHYSDEV_OP_BRIDGED;
info->bitmask |= XT_PHYSDEV_OP_BRIDGED;
break;
}
}
static void physdev_check(struct xt_fcheck_call *cb)
{
if (cb->xflags == 0)
xtables_error(PARAMETER_PROBLEM, "PHYSDEV: no physdev option specified");
}
static void
physdev_print(const void *ip, const struct xt_entry_match *match, int numeric)
{
const struct xt_physdev_info *info = (const void *)match->data;
printf(" PHYSDEV match");
if (info->bitmask & XT_PHYSDEV_OP_ISIN)
printf("%s --physdev-is-in",
info->invert & XT_PHYSDEV_OP_ISIN ? " !":"");
if (info->bitmask & XT_PHYSDEV_OP_IN)
printf("%s --physdev-in %s",
(info->invert & XT_PHYSDEV_OP_IN) ? " !":"", info->physindev);
if (info->bitmask & XT_PHYSDEV_OP_ISOUT)
printf("%s --physdev-is-out",
info->invert & XT_PHYSDEV_OP_ISOUT ? " !":"");
if (info->bitmask & XT_PHYSDEV_OP_OUT)
printf("%s --physdev-out %s",
(info->invert & XT_PHYSDEV_OP_OUT) ? " !":"", info->physoutdev);
if (info->bitmask & XT_PHYSDEV_OP_BRIDGED)
printf("%s --physdev-is-bridged",
info->invert & XT_PHYSDEV_OP_BRIDGED ? " !":"");
}
static void physdev_save(const void *ip, const struct xt_entry_match *match)
{
const struct xt_physdev_info *info = (const void *)match->data;
if (info->bitmask & XT_PHYSDEV_OP_ISIN)
printf("%s --physdev-is-in",
(info->invert & XT_PHYSDEV_OP_ISIN) ? " !" : "");
if (info->bitmask & XT_PHYSDEV_OP_IN)
printf("%s --physdev-in %s",
(info->invert & XT_PHYSDEV_OP_IN) ? " !" : "",
info->physindev);
if (info->bitmask & XT_PHYSDEV_OP_ISOUT)
printf("%s --physdev-is-out",
(info->invert & XT_PHYSDEV_OP_ISOUT) ? " !" : "");
if (info->bitmask & XT_PHYSDEV_OP_OUT)
printf("%s --physdev-out %s",
(info->invert & XT_PHYSDEV_OP_OUT) ? " !" : "",
info->physoutdev);
if (info->bitmask & XT_PHYSDEV_OP_BRIDGED)
printf("%s --physdev-is-bridged",
(info->invert & XT_PHYSDEV_OP_BRIDGED) ? " !" : "");
}
static struct xtables_match physdev_match = {
.family = NFPROTO_UNSPEC,
.name = "physdev",
.version = XTABLES_VERSION,
.size = XT_ALIGN(sizeof(struct xt_physdev_info)),
.userspacesize = XT_ALIGN(sizeof(struct xt_physdev_info)),
.help = physdev_help,
.print = physdev_print,
.save = physdev_save,
.x6_parse = physdev_parse,
.x6_fcheck = physdev_check,
.x6_options = physdev_opts,
};
void _init(void)
{
xtables_register_match(&physdev_match);
}
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