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/*
* Shared library add-on to iptables to add quota support
*
* Sam Johnston <samj@samj.net>
*/
#include <stdio.h>
#include <xtables.h>
#include <linux/netfilter/xt_quota.h>
enum {
O_QUOTA = 0,
};
static const struct xt_option_entry quota_opts[] = {
{.name = "quota", .id = O_QUOTA, .type = XTTYPE_UINT64,
.flags = XTOPT_MAND | XTOPT_INVERT | XTOPT_PUT,
XTOPT_POINTER(struct xt_quota_info, quota)},
XTOPT_TABLEEND,
};
static void quota_help(void)
{
printf("quota match options:\n"
"[!] --quota quota quota (bytes)\n");
}
static void
quota_print(const void *ip, const struct xt_entry_match *match, int numeric)
{
const struct xt_quota_info *q = (const void *)match->data;
printf(" quota: %llu bytes", (unsigned long long)q->quota);
}
static void
quota_save(const void *ip, const struct xt_entry_match *match)
{
const struct xt_quota_info *q = (const void *)match->data;
if (q->flags & XT_QUOTA_INVERT)
printf("! ");
printf(" --quota %llu", (unsigned long long) q->quota);
}
static void quota_parse(struct xt_option_call *cb)
{
struct xt_quota_info *info = cb->data;
xtables_option_parse(cb);
if (cb->invert)
info->flags |= XT_QUOTA_INVERT;
}
static struct xtables_match quota_match = {
.family = NFPROTO_UNSPEC,
.name = "quota",
.version = XTABLES_VERSION,
.size = XT_ALIGN(sizeof (struct xt_quota_info)),
.userspacesize = offsetof(struct xt_quota_info, master),
.help = quota_help,
.print = quota_print,
.save = quota_save,
.x6_parse = quota_parse,
.x6_options = quota_opts,
};
void
_init(void)
{
xtables_register_match("a_match);
}
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