This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / net / netfilter / xt_mark.c

diff --git a/net/netfilter/xt_mark.c b/net/netfilter/xt_mark.c
new file mode 100644 (file)
index 0000000..8b385a3
--- /dev/null
+++ b/net/netfilter/xt_mark.c
@@ -0,0 +1,93 @@
+/* Kernel module to match NFMARK values. */
+
+/* (C) 1999-2001 Marc Boucher <marc@mbsi.ca>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/skbuff.h>
+
+#include <linux/netfilter/xt_mark.h>
+#include <linux/netfilter/x_tables.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");
+MODULE_DESCRIPTION("iptables mark matching module");
+MODULE_ALIAS("ipt_mark");
+MODULE_ALIAS("ip6t_mark");
+
+static int
+match(const struct sk_buff *skb,
+      const struct net_device *in,
+      const struct net_device *out,
+      const struct xt_match *match,
+      const void *matchinfo,
+      int offset,
+      unsigned int protoff,
+      int *hotdrop)
+{
+       const struct xt_mark_info *info = matchinfo;
+
+       return ((skb->nfmark & info->mask) == info->mark) ^ info->invert;
+}
+
+static int
+checkentry(const char *tablename,
+           const void *entry,
+          const struct xt_match *match,
+           void *matchinfo,
+           unsigned int matchsize,
+           unsigned int hook_mask)
+{
+       struct xt_mark_info *minfo = (struct xt_mark_info *) matchinfo;
+
+       if (minfo->mark > 0xffffffff || minfo->mask > 0xffffffff) {
+               printk(KERN_WARNING "mark: only supports 32bit mark\n");
+               return 0;
+       }
+       return 1;
+}
+
+static struct xt_match mark_match = {
+       .name           = "mark",
+       .match          = match,
+       .matchsize      = sizeof(struct xt_mark_info),
+       .checkentry     = checkentry,
+       .family         = AF_INET,
+       .me             = THIS_MODULE,
+};
+
+static struct xt_match mark6_match = {
+       .name           = "mark",
+       .match          = match,
+       .matchsize      = sizeof(struct xt_mark_info),
+       .checkentry     = checkentry,
+       .family         = AF_INET6,
+       .me             = THIS_MODULE,
+};
+
+static int __init xt_mark_init(void)
+{
+       int ret;
+       ret = xt_register_match(&mark_match);
+       if (ret)
+               return ret;
+
+       ret = xt_register_match(&mark6_match);
+       if (ret)
+               xt_unregister_match(&mark_match);
+
+       return ret;
+}
+
+static void __exit xt_mark_fini(void)
+{
+       xt_unregister_match(&mark_match);
+       xt_unregister_match(&mark6_match);
+}
+
+module_init(xt_mark_init);
+module_exit(xt_mark_fini);