From a4cc116f706a4462e2e12306692b3b6166298a91 Mon Sep 17 00:00:00 2001
From: laforge <laforge>
Date: Tue, 27 Nov 2001 15:22:44 +0000
Subject: new IPV4OPTSSTRIP target

---
 extensions/libipt_IPV4OPTSSTRIP.c | 81 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 extensions/libipt_IPV4OPTSSTRIP.c

(limited to 'extensions/libipt_IPV4OPTSSTRIP.c')

diff --git a/extensions/libipt_IPV4OPTSSTRIP.c b/extensions/libipt_IPV4OPTSSTRIP.c
new file mode 100644
index 0000000..59cbf19
--- /dev/null
+++ b/extensions/libipt_IPV4OPTSSTRIP.c
@@ -0,0 +1,81 @@
+/* Shared library add-on to iptables for IPV4OPTSSTRIP
+ * This modules strip all the IP options.
+ *
+ * (C) 2001 by Fabrice MARIE <fabrice@celestix.com>
+ * This program is distributed under the terms of GNU GPL v2, 1991
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+
+#include <iptables.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+
+static void init(struct ipt_entry_target *t, unsigned int *nfcache) 
+{
+        *nfcache |= NFC_UNKNOWN;
+}
+
+static void help(void) 
+{
+	printf("IPV4OPTSSTRIP v%s target takes no option !! Make sure you use it in the mangle table.\n",
+	       NETFILTER_VERSION);
+}
+
+static struct option opts[] = {
+	{ 0 }
+};
+
+/* Function which parses command options; returns true if it
+   ate an option */
+static int
+parse(int c, char **argv, int invert, unsigned int *flags,
+      const struct ipt_entry *entry,
+      struct ipt_entry_target **target)
+{
+	return 0;
+}
+
+static void
+final_check(unsigned int flags)
+{
+}
+
+/* Prints out the targinfo. */
+static void
+print(const struct ipt_ip *ip,
+      const struct ipt_entry_target *target,
+      int numeric)
+{
+	/* nothing to print, we don't take option... */
+}
+
+/* Saves the stuff in parsable form to stdout. */
+static void
+save(const struct ipt_ip *ip, const struct ipt_entry_target *target)
+{
+	/* nothing to print, we don't take option... */
+}
+
+static
+struct iptables_target IPV4OPTSSTRIP
+= { NULL,
+    "IPV4OPTSSTRIP",
+    NETFILTER_VERSION,
+    IPT_ALIGN(0),
+    IPT_ALIGN(0),
+    &help,
+    &init,
+    &parse,
+    &final_check,
+    &print,
+    &save,
+    opts
+};
+
+void _init(void)
+{
+	register_target(&IPV4OPTSSTRIP);
+}
-- 
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