Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / net / netfilter / nft_redir.c

diff --git a/kernel/net/netfilter/nft_redir.c b/kernel/net/netfilter/nft_redir.c
new file mode 100644 (file)
index 0000000..03f7bf4
--- /dev/null
+++ b/kernel/net/netfilter/nft_redir.c
@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2014 Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
+ *
+ * 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.
+ */
+
+#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_nat.h>
+#include <net/netfilter/nf_tables.h>
+#include <net/netfilter/nft_redir.h>
+
+const struct nla_policy nft_redir_policy[NFTA_REDIR_MAX + 1] = {
+       [NFTA_REDIR_REG_PROTO_MIN]      = { .type = NLA_U32 },
+       [NFTA_REDIR_REG_PROTO_MAX]      = { .type = NLA_U32 },
+       [NFTA_REDIR_FLAGS]              = { .type = NLA_U32 },
+};
+EXPORT_SYMBOL_GPL(nft_redir_policy);
+
+int nft_redir_validate(const struct nft_ctx *ctx,
+                      const struct nft_expr *expr,
+                      const struct nft_data **data)
+{
+       int err;
+
+       err = nft_chain_validate_dependency(ctx->chain, NFT_CHAIN_T_NAT);
+       if (err < 0)
+               return err;
+
+       return nft_chain_validate_hooks(ctx->chain,
+                                       (1 << NF_INET_PRE_ROUTING) |
+                                       (1 << NF_INET_LOCAL_OUT));
+}
+EXPORT_SYMBOL_GPL(nft_redir_validate);
+
+int nft_redir_init(const struct nft_ctx *ctx,
+                  const struct nft_expr *expr,
+                  const struct nlattr * const tb[])
+{
+       struct nft_redir *priv = nft_expr_priv(expr);
+       unsigned int plen;
+       int err;
+
+       err = nft_redir_validate(ctx, expr, NULL);
+       if (err < 0)
+               return err;
+
+       plen = FIELD_SIZEOF(struct nf_nat_range, min_addr.all);
+       if (tb[NFTA_REDIR_REG_PROTO_MIN]) {
+               priv->sreg_proto_min =
+                       nft_parse_register(tb[NFTA_REDIR_REG_PROTO_MIN]);
+
+               err = nft_validate_register_load(priv->sreg_proto_min, plen);
+               if (err < 0)
+                       return err;
+
+               if (tb[NFTA_REDIR_REG_PROTO_MAX]) {
+                       priv->sreg_proto_max =
+                               nft_parse_register(tb[NFTA_REDIR_REG_PROTO_MAX]);
+
+                       err = nft_validate_register_load(priv->sreg_proto_max,
+                                                        plen);
+                       if (err < 0)
+                               return err;
+               } else {
+                       priv->sreg_proto_max = priv->sreg_proto_min;
+               }
+       }
+
+       if (tb[NFTA_REDIR_FLAGS]) {
+               priv->flags = ntohl(nla_get_be32(tb[NFTA_REDIR_FLAGS]));
+               if (priv->flags & ~NF_NAT_RANGE_MASK)
+                       return -EINVAL;
+       }
+
+       return 0;
+}
+EXPORT_SYMBOL_GPL(nft_redir_init);
+
+int nft_redir_dump(struct sk_buff *skb, const struct nft_expr *expr)
+{
+       const struct nft_redir *priv = nft_expr_priv(expr);
+
+       if (priv->sreg_proto_min) {
+               if (nft_dump_register(skb, NFTA_REDIR_REG_PROTO_MIN,
+                                     priv->sreg_proto_min))
+                       goto nla_put_failure;
+               if (nft_dump_register(skb, NFTA_REDIR_REG_PROTO_MAX,
+                                     priv->sreg_proto_max))
+                       goto nla_put_failure;
+       }
+
+       if (priv->flags != 0 &&
+           nla_put_be32(skb, NFTA_REDIR_FLAGS, htonl(priv->flags)))
+                       goto nla_put_failure;
+
+       return 0;
+
+nla_put_failure:
+       return -1;
+}
+EXPORT_SYMBOL_GPL(nft_redir_dump);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>");