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83 lines
1.9 KiB
83 lines
1.9 KiB
/*
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* Shared library add-on to iptables to add quota support
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*
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* Sam Johnston <samj@samj.net>
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*/
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#include <stdio.h>
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#include <xtables.h>
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#include <linux/netfilter/xt_quota.h>
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enum {
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O_QUOTA = 0,
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};
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static const struct xt_option_entry quota_opts[] = {
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{.name = "quota", .id = O_QUOTA, .type = XTTYPE_UINT64,
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.flags = XTOPT_MAND | XTOPT_INVERT | XTOPT_PUT,
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XTOPT_POINTER(struct xt_quota_info, quota)},
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XTOPT_TABLEEND,
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};
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static void quota_help(void)
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{
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printf("quota match options:\n"
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"[!] --quota quota quota (bytes)\n");
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}
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static void
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quota_print(const void *ip, const struct xt_entry_match *match, int numeric)
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{
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const struct xt_quota_info *q = (const void *)match->data;
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printf(" quota: %llu bytes", (unsigned long long)q->quota);
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}
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static void
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quota_save(const void *ip, const struct xt_entry_match *match)
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{
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const struct xt_quota_info *q = (const void *)match->data;
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if (q->flags & XT_QUOTA_INVERT)
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printf(" !");
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printf(" --quota %llu", (unsigned long long) q->quota);
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}
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static void quota_parse(struct xt_option_call *cb)
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{
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struct xt_quota_info *info = cb->data;
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xtables_option_parse(cb);
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if (cb->invert)
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info->flags |= XT_QUOTA_INVERT;
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}
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static int quota_xlate(struct xt_xlate *xl,
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const struct xt_xlate_mt_params *params)
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{
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const struct xt_quota_info *q = (void *)params->match->data;
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xt_xlate_add(xl, "quota %s%llu bytes",
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q->flags & XT_QUOTA_INVERT ? "over " : "",
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(unsigned long long) q->quota);
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return 1;
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}
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static struct xtables_match quota_match = {
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.family = NFPROTO_UNSPEC,
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.name = "quota",
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.version = XTABLES_VERSION,
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.size = XT_ALIGN(sizeof (struct xt_quota_info)),
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.userspacesize = offsetof(struct xt_quota_info, master),
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.help = quota_help,
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.print = quota_print,
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.save = quota_save,
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.x6_parse = quota_parse,
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.x6_options = quota_opts,
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.xlate = quota_xlate,
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};
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void
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_init(void)
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{
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xtables_register_match("a_match);
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}
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