Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / net / ipv6 / netfilter / ip6t_MASQUERADE.c

diff --git a/kernel/net/ipv6/netfilter/ip6t_MASQUERADE.c b/kernel/net/ipv6/netfilter/ip6t_MASQUERADE.c
new file mode 100644 (file)
index 0000000..7f9f45d
--- /dev/null
+++ b/kernel/net/ipv6/netfilter/ip6t_MASQUERADE.c
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2011 Patrick McHardy <kaber@trash.net>
+ *
+ * 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.
+ *
+ * Based on Rusty Russell's IPv6 MASQUERADE target. Development of IPv6
+ * NAT funded by Astaro.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/ipv6.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv6.h>
+#include <linux/netfilter/x_tables.h>
+#include <net/netfilter/nf_nat.h>
+#include <net/addrconf.h>
+#include <net/ipv6.h>
+#include <net/netfilter/ipv6/nf_nat_masquerade.h>
+
+static unsigned int
+masquerade_tg6(struct sk_buff *skb, const struct xt_action_param *par)
+{
+       return nf_nat_masquerade_ipv6(skb, par->targinfo, par->out);
+}
+
+static int masquerade_tg6_checkentry(const struct xt_tgchk_param *par)
+{
+       const struct nf_nat_range *range = par->targinfo;
+
+       if (range->flags & NF_NAT_RANGE_MAP_IPS)
+               return -EINVAL;
+       return 0;
+}
+
+static struct xt_target masquerade_tg6_reg __read_mostly = {
+       .name           = "MASQUERADE",
+       .family         = NFPROTO_IPV6,
+       .checkentry     = masquerade_tg6_checkentry,
+       .target         = masquerade_tg6,
+       .targetsize     = sizeof(struct nf_nat_range),
+       .table          = "nat",
+       .hooks          = 1 << NF_INET_POST_ROUTING,
+       .me             = THIS_MODULE,
+};
+
+static int __init masquerade_tg6_init(void)
+{
+       int err;
+
+       err = xt_register_target(&masquerade_tg6_reg);
+       if (err == 0)
+               nf_nat_masquerade_ipv6_register_notifier();
+
+       return err;
+}
+static void __exit masquerade_tg6_exit(void)
+{
+       nf_nat_masquerade_ipv6_unregister_notifier();
+       xt_unregister_target(&masquerade_tg6_reg);
+}
+
+module_init(masquerade_tg6_init);
+module_exit(masquerade_tg6_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
+MODULE_DESCRIPTION("Xtables: automatic address SNAT");