1 files changed, 63 insertions, 0 deletions

diff --git a/net/sched/em_u32.c b/net/sched/em_u32.c
new file mode 100644
index 000000000000..34e7e51e601e
--- /dev/null
+++ b/net/sched/em_u32.c
@@ -0,0 +1,63 @@
+/*
+ * net/sched/em_u32.c   U32 Ematch
+ *
+ *              This program is free software; you can redistribute it and/or
+ *              modify it under the terms of the GNU General Public License
+ *              as published by the Free Software Foundation; either version
+ *              2 of the License, or (at your option) any later version.
+ *
+ * Authors:     Thomas Graf <tgraf@suug.ch>
+ *              Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ *
+ * Based on net/sched/cls_u32.c
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+#include <net/pkt_cls.h>
+
+static int em_u32_match(struct sk_buff *skb, struct tcf_ematch *em,
+                        struct tcf_pkt_info *info)
+{
+        struct tc_u32_key *key = (struct tc_u32_key *) em->data;
+        unsigned char *ptr = skb->nh.raw;
+        
+        if (info) {
+                if (info->ptr)
+                        ptr = info->ptr;
+                ptr += (info->nexthdr & key->offmask);
+        }
+
+        ptr += key->off;
+
+        if (!tcf_valid_offset(skb, ptr, sizeof(u32)))
+                return 0;
+        
+        return !(((*(u32*) ptr)  ^ key->val) & key->mask);
+}
+
+static struct tcf_ematch_ops em_u32_ops = {
+        .kind     = TCF_EM_U32,
+        .datalen  = sizeof(struct tc_u32_key),
+        .match    = em_u32_match,
+        .owner    = THIS_MODULE,
+        .link     = LIST_HEAD_INIT(em_u32_ops.link)
+};
+
+static int __init init_em_u32(void)
+{
+        return tcf_em_register(&em_u32_ops);
+}
+
+static void __exit exit_em_u32(void) 
+{
+        tcf_em_unregister(&em_u32_ops);
+}
+
+MODULE_LICENSE("GPL");
+
+module_init(init_em_u32);
+module_exit(exit_em_u32);