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#include <stdio.h>
#include <xtables.h>
#include <linux/netfilter/xt_cgroup.h>
enum {
O_CGROUP = 0,
};
static void cgroup_help(void)
{
printf(
"cgroup match options:\n"
"[!] --cgroup fwid Match cgroup fwid\n");
}
static const struct xt_option_entry cgroup_opts[] = {
{
.name = "cgroup",
.id = O_CGROUP,
.type = XTTYPE_UINT32,
.flags = XTOPT_INVERT | XTOPT_MAND | XTOPT_PUT,
XTOPT_POINTER(struct xt_cgroup_info, id)
},
XTOPT_TABLEEND,
};
static void cgroup_parse(struct xt_option_call *cb)
{
struct xt_cgroup_info *cgroupinfo = cb->data;
xtables_option_parse(cb);
if (cb->invert)
cgroupinfo->invert = true;
}
static void
cgroup_print(const void *ip, const struct xt_entry_match *match, int numeric)
{
const struct xt_cgroup_info *info = (void *) match->data;
printf(" cgroup %s%u", info->invert ? "! ":"", info->id);
}
static void cgroup_save(const void *ip, const struct xt_entry_match *match)
{
const struct xt_cgroup_info *info = (void *) match->data;
printf("%s --cgroup %u", info->invert ? " !" : "", info->id);
}
static struct xtables_match cgroup_match = {
.family = NFPROTO_UNSPEC,
.name = "cgroup",
.version = XTABLES_VERSION,
.size = XT_ALIGN(sizeof(struct xt_cgroup_info)),
.userspacesize = XT_ALIGN(sizeof(struct xt_cgroup_info)),
.help = cgroup_help,
.print = cgroup_print,
.save = cgroup_save,
.x6_parse = cgroup_parse,
.x6_options = cgroup_opts,
};
void _init(void)
{
xtables_register_match(&cgroup_match);
}
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