Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / net / ipv6 / netfilter / nf_tables_ipv6.c

diff --git a/kernel/net/ipv6/netfilter/nf_tables_ipv6.c b/kernel/net/ipv6/netfilter/nf_tables_ipv6.c
new file mode 100644 (file)
index 0000000..c8148ba
--- /dev/null
+++ b/kernel/net/ipv6/netfilter/nf_tables_ipv6.c
@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
+ * Copyright (c) 2012-2013 Pablo Neira Ayuso <pablo@netfilter.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/init.h>
+#include <linux/module.h>
+#include <linux/ipv6.h>
+#include <linux/netfilter_ipv6.h>
+#include <net/netfilter/nf_tables.h>
+#include <net/netfilter/nf_tables_ipv6.h>
+
+static unsigned int nft_do_chain_ipv6(const struct nf_hook_ops *ops,
+                                     struct sk_buff *skb,
+                                     const struct nf_hook_state *state)
+{
+       struct nft_pktinfo pkt;
+
+       /* malformed packet, drop it */
+       if (nft_set_pktinfo_ipv6(&pkt, ops, skb, state) < 0)
+               return NF_DROP;
+
+       return nft_do_chain(&pkt, ops);
+}
+
+static unsigned int nft_ipv6_output(const struct nf_hook_ops *ops,
+                                   struct sk_buff *skb,
+                                   const struct nf_hook_state *state)
+{
+       if (unlikely(skb->len < sizeof(struct ipv6hdr))) {
+               if (net_ratelimit())
+                       pr_info("nf_tables_ipv6: ignoring short SOCK_RAW "
+                               "packet\n");
+               return NF_ACCEPT;
+       }
+
+       return nft_do_chain_ipv6(ops, skb, state);
+}
+
+struct nft_af_info nft_af_ipv6 __read_mostly = {
+       .family         = NFPROTO_IPV6,
+       .nhooks         = NF_INET_NUMHOOKS,
+       .owner          = THIS_MODULE,
+       .nops           = 1,
+       .hooks          = {
+               [NF_INET_LOCAL_IN]      = nft_do_chain_ipv6,
+               [NF_INET_LOCAL_OUT]     = nft_ipv6_output,
+               [NF_INET_FORWARD]       = nft_do_chain_ipv6,
+               [NF_INET_PRE_ROUTING]   = nft_do_chain_ipv6,
+               [NF_INET_POST_ROUTING]  = nft_do_chain_ipv6,
+       },
+};
+EXPORT_SYMBOL_GPL(nft_af_ipv6);
+
+static int nf_tables_ipv6_init_net(struct net *net)
+{
+       net->nft.ipv6 = kmalloc(sizeof(struct nft_af_info), GFP_KERNEL);
+       if (net->nft.ipv6 == NULL)
+               return -ENOMEM;
+
+       memcpy(net->nft.ipv6, &nft_af_ipv6, sizeof(nft_af_ipv6));
+
+       if (nft_register_afinfo(net, net->nft.ipv6) < 0)
+               goto err;
+
+       return 0;
+err:
+       kfree(net->nft.ipv6);
+       return -ENOMEM;
+}
+
+static void nf_tables_ipv6_exit_net(struct net *net)
+{
+       nft_unregister_afinfo(net->nft.ipv6);
+       kfree(net->nft.ipv6);
+}
+
+static struct pernet_operations nf_tables_ipv6_net_ops = {
+       .init   = nf_tables_ipv6_init_net,
+       .exit   = nf_tables_ipv6_exit_net,
+};
+
+static const struct nf_chain_type filter_ipv6 = {
+       .name           = "filter",
+       .type           = NFT_CHAIN_T_DEFAULT,
+       .family         = NFPROTO_IPV6,
+       .owner          = THIS_MODULE,
+       .hook_mask      = (1 << NF_INET_LOCAL_IN) |
+                         (1 << NF_INET_LOCAL_OUT) |
+                         (1 << NF_INET_FORWARD) |
+                         (1 << NF_INET_PRE_ROUTING) |
+                         (1 << NF_INET_POST_ROUTING),
+};
+
+static int __init nf_tables_ipv6_init(void)
+{
+       int ret;
+
+       nft_register_chain_type(&filter_ipv6);
+       ret = register_pernet_subsys(&nf_tables_ipv6_net_ops);
+       if (ret < 0)
+               nft_unregister_chain_type(&filter_ipv6);
+
+       return ret;
+}
+
+static void __exit nf_tables_ipv6_exit(void)
+{
+       unregister_pernet_subsys(&nf_tables_ipv6_net_ops);
+       nft_unregister_chain_type(&filter_ipv6);
+}
+
+module_init(nf_tables_ipv6_init);
+module_exit(nf_tables_ipv6_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
+MODULE_ALIAS_NFT_FAMILY(AF_INET6);