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Diffstat (limited to 'net/ipv4/netfilter/nft_reject_ipv4.c')
-rw-r--r--net/ipv4/netfilter/nft_reject_ipv4.c74
1 files changed, 74 insertions, 0 deletions
diff --git a/net/ipv4/netfilter/nft_reject_ipv4.c b/net/ipv4/netfilter/nft_reject_ipv4.c
new file mode 100644
index 000000000000..e935d8de1182
--- /dev/null
+++ b/net/ipv4/netfilter/nft_reject_ipv4.c
@@ -0,0 +1,74 @@
+/*
+ * 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/icmp.h>
+#include <net/netfilter/ipv4/nf_reject.h>
+#include <net/netfilter/nft_reject.h>
+
+static void nft_reject_ipv4_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);
+
+ switch (priv->type) {
+ case NFT_REJECT_ICMP_UNREACH:
+ nf_send_unreach(pkt->skb, priv->icmp_code);
+ break;
+ case NFT_REJECT_TCP_RST:
+ nf_send_reset(pkt->skb, pkt->ops->hooknum);
+ break;
+ }
+
+ data[NFT_REG_VERDICT].verdict = NF_DROP;
+}
+
+static struct nft_expr_type nft_reject_ipv4_type;
+static const struct nft_expr_ops nft_reject_ipv4_ops = {
+ .type = &nft_reject_ipv4_type,
+ .size = NFT_EXPR_SIZE(sizeof(struct nft_reject)),
+ .eval = nft_reject_ipv4_eval,
+ .init = nft_reject_init,
+ .dump = nft_reject_dump,
+};
+
+static struct nft_expr_type nft_reject_ipv4_type __read_mostly = {
+ .family = NFPROTO_IPV4,
+ .name = "reject",
+ .ops = &nft_reject_ipv4_ops,
+ .policy = nft_reject_policy,
+ .maxattr = NFTA_REJECT_MAX,
+ .owner = THIS_MODULE,
+};
+
+static int __init nft_reject_ipv4_module_init(void)
+{
+ return nft_register_expr(&nft_reject_ipv4_type);
+}
+
+static void __exit nft_reject_ipv4_module_exit(void)
+{
+ nft_unregister_expr(&nft_reject_ipv4_type);
+}
+
+module_init(nft_reject_ipv4_module_init);
+module_exit(nft_reject_ipv4_module_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
+MODULE_ALIAS_NFT_AF_EXPR(AF_INET, "reject");