netfilter: nft_reject: split up reject module into IPv4 and IPv6 specifc parts

[cascardo/linux.git] / net / ipv6 / netfilter / nft_reject_ipv6.c

diff --git a/net/ipv6/netfilter/nft_reject_ipv6.c b/net/ipv6/netfilter/nft_reject_ipv6.c
new file mode 100644 (file)
index 0000000..f732859
--- /dev/null
+++ b/net/ipv6/netfilter/nft_reject_ipv6.c
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net>
+ * Copyright (c) 2013 Eric Leblond <eric@regit.org>
+ *
+ * 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.
+ *
+ * Development of this code funded by Astaro AG (http://www.astaro.com/)
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/netlink.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter/nf_tables.h>
+#include <net/netfilter/nf_tables.h>
+#include <net/netfilter/nft_reject.h>
+#include <net/netfilter/ipv6/nf_reject.h>
+
+static void nft_reject_ipv6_eval(const struct nft_expr *expr,
+                                struct nft_data data[NFT_REG_MAX + 1],
+                                const struct nft_pktinfo *pkt)
+{
+       struct nft_reject *priv = nft_expr_priv(expr);
+       struct net *net = dev_net((pkt->in != NULL) ? pkt->in : pkt->out);
+
+       switch (priv->type) {
+       case NFT_REJECT_ICMP_UNREACH:
+               nf_send_unreach6(net, pkt->skb, priv->icmp_code,
+                                pkt->ops->hooknum);
+               break;
+       case NFT_REJECT_TCP_RST:
+               nf_send_reset6(net, pkt->skb, pkt->ops->hooknum);
+               break;
+       }
+
+       data[NFT_REG_VERDICT].verdict = NF_DROP;
+}
+
+static struct nft_expr_type nft_reject_ipv6_type;
+static const struct nft_expr_ops nft_reject_ipv6_ops = {
+       .type           = &nft_reject_ipv6_type,
+       .size           = NFT_EXPR_SIZE(sizeof(struct nft_reject)),
+       .eval           = nft_reject_ipv6_eval,
+       .init           = nft_reject_init,
+       .dump           = nft_reject_dump,
+};
+
+static struct nft_expr_type nft_reject_ipv6_type __read_mostly = {
+       .family         = NFPROTO_IPV6,
+       .name           = "reject",
+       .ops            = &nft_reject_ipv6_ops,
+       .policy         = nft_reject_policy,
+       .maxattr        = NFTA_REJECT_MAX,
+       .owner          = THIS_MODULE,
+};
+
+static int __init nft_reject_ipv6_module_init(void)
+{
+       return nft_register_expr(&nft_reject_ipv6_type);
+}
+
+static void __exit nft_reject_ipv6_module_exit(void)
+{
+       nft_unregister_expr(&nft_reject_ipv6_type);
+}
+
+module_init(nft_reject_ipv6_module_init);
+module_exit(nft_reject_ipv6_module_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
+MODULE_ALIAS_NFT_AF_EXPR(AF_INET6, "reject");