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-rwxr-xr-xextensions/.quota-test3
-rw-r--r--extensions/libipt_quota.c114
2 files changed, 117 insertions, 0 deletions
diff --git a/extensions/.quota-test b/extensions/.quota-test
new file mode 100755
index 00000000..761bf143
--- /dev/null
+++ b/extensions/.quota-test
@@ -0,0 +1,3 @@
+#!/bin/sh
+[ -f $KERNEL_DIR/include/linux/netfilter_ipv4/ipt_quota.h ] && echo quota
+
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);
+}