From e746abb15df34da1729de8d669c95f1b0b9ecb7c Mon Sep 17 00:00:00 2001
From: Harald Welte <laforge@gnumonks.org>
Date: Mon, 3 Dec 2001 22:22:55 +0000
Subject: add quota patch

---
 extensions/libipt_quota.c | 114 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 extensions/libipt_quota.c

(limited to 'extensions/libipt_quota.c')

diff --git a/extensions/libipt_quota.c b/extensions/libipt_quota.c
new file mode 100644
index 00000000..28e16e61
--- /dev/null
+++ b/extensions/libipt_quota.c
@@ -0,0 +1,114 @@
+/*
+ * Shared library add-on to iptables to add quota support
+ *
+ * Sam Johnston <samj@samj.net>
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <iptables.h>
+
+#include <linux/netfilter_ipv4/ipt_quota.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+
+static struct option opts[] = {
+        {"quota", 1, 0, '1'},
+        {0}
+};
+
+/* print usage */
+static void
+help(void)
+{
+        printf("quota options:\n"
+               " --quota quota			quota (bytes)\n" "\n");
+}
+
+/* initialise match */
+static void
+init(struct ipt_entry_match *m, unsigned int *nfcache)
+{
+        /* no can cache */
+        *nfcache |= NFC_UNKNOWN;
+}
+
+/* print matchinfo */
+static void
+print(const struct ipt_ip *ip, const struct ipt_entry_match *match, int numeric)
+{
+        struct ipt_quota_info *q = (struct ipt_quota_info *) match->data;
+        printf("quota: %llu bytes", (unsigned long long) q->quota);
+}
+
+/* save matchinfo */
+static void
+save(const struct ipt_ip *ip, const struct ipt_entry_match *match)
+{
+        struct ipt_quota_info *q = (struct ipt_quota_info *) match->data;
+        printf("--quota %llu ", (unsigned long long) q->quota);
+}
+
+/* parse quota option */
+static int
+parse_quota(const char *s, u_int64_t * quota)
+{
+        *quota = strtoull(s, (char **) NULL, 10);
+
+#ifdef DEBUG_IPT_QUOTA
+        printf("Quota: %llu\n", *quota);
+#endif
+
+        if (*quota == -1)
+                exit_error(PARAMETER_PROBLEM, "quota invalid: '%s'\n", s);
+        else
+                return 1;
+}
+
+/* parse all options, returning true if we found any for us */
+static int
+parse(int c, char **argv, int invert, unsigned int *flags,
+      const struct ipt_entry *entry,
+      unsigned int *nfcache, struct ipt_entry_match **match)
+{
+        struct ipt_quota_info *info = (struct ipt_quota_info *) (*match)->data;
+
+        switch (c) {
+        case '1':
+                if (check_inverse(optarg, &invert))
+                        exit_error(PARAMETER_PROBLEM, "quota: unexpected '!'");
+                if (!parse_quota(optarg, &info->quota))
+                        exit_error(PARAMETER_PROBLEM,
+                                   "bad quota: '%s'", optarg);
+                break;
+
+        default:
+                return 0;
+        }
+        return 1;
+}
+
+/* no final check */
+static void
+final_check(unsigned int flags)
+{
+}
+
+struct iptables_match quota = { NULL,
+        "quota",
+        NETFILTER_VERSION,
+        IPT_ALIGN(sizeof (struct ipt_quota_info)),
+        IPT_ALIGN(sizeof (struct ipt_quota_info)),
+        &help,
+        &init,
+        &parse,
+        &final_check,
+        &print,
+        &save,
+        opts
+};
+
+void
+_init(void)
+{
+        register_match(&quota);
+}
-- 
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