These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / net / ipv6 / netfilter / nft_dup_ipv6.c

diff --git a/kernel/net/ipv6/netfilter/nft_dup_ipv6.c b/kernel/net/ipv6/netfilter/nft_dup_ipv6.c
new file mode 100644 (file)
index 0000000..8bfd470
--- /dev/null
+++ b/kernel/net/ipv6/netfilter/nft_dup_ipv6.c
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2015 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.
+ */
+
+#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/ipv6/nf_dup_ipv6.h>
+
+struct nft_dup_ipv6 {
+       enum nft_registers      sreg_addr:8;
+       enum nft_registers      sreg_dev:8;
+};
+
+static void nft_dup_ipv6_eval(const struct nft_expr *expr,
+                             struct nft_regs *regs,
+                             const struct nft_pktinfo *pkt)
+{
+       struct nft_dup_ipv6 *priv = nft_expr_priv(expr);
+       struct in6_addr *gw = (struct in6_addr *)&regs->data[priv->sreg_addr];
+       int oif = regs->data[priv->sreg_dev];
+
+       nf_dup_ipv6(pkt->net, pkt->skb, pkt->hook, gw, oif);
+}
+
+static int nft_dup_ipv6_init(const struct nft_ctx *ctx,
+                            const struct nft_expr *expr,
+                            const struct nlattr * const tb[])
+{
+       struct nft_dup_ipv6 *priv = nft_expr_priv(expr);
+       int err;
+
+       if (tb[NFTA_DUP_SREG_ADDR] == NULL)
+               return -EINVAL;
+
+       priv->sreg_addr = nft_parse_register(tb[NFTA_DUP_SREG_ADDR]);
+       err = nft_validate_register_load(priv->sreg_addr, sizeof(struct in6_addr));
+       if (err < 0)
+               return err;
+
+       if (tb[NFTA_DUP_SREG_DEV] != NULL) {
+               priv->sreg_dev = nft_parse_register(tb[NFTA_DUP_SREG_DEV]);
+               return nft_validate_register_load(priv->sreg_dev, sizeof(int));
+       }
+       return 0;
+}
+
+static int nft_dup_ipv6_dump(struct sk_buff *skb, const struct nft_expr *expr)
+{
+       struct nft_dup_ipv6 *priv = nft_expr_priv(expr);
+
+       if (nft_dump_register(skb, NFTA_DUP_SREG_ADDR, priv->sreg_addr) ||
+           nft_dump_register(skb, NFTA_DUP_SREG_DEV, priv->sreg_dev))
+               goto nla_put_failure;
+
+       return 0;
+
+nla_put_failure:
+       return -1;
+}
+
+static struct nft_expr_type nft_dup_ipv6_type;
+static const struct nft_expr_ops nft_dup_ipv6_ops = {
+       .type           = &nft_dup_ipv6_type,
+       .size           = NFT_EXPR_SIZE(sizeof(struct nft_dup_ipv6)),
+       .eval           = nft_dup_ipv6_eval,
+       .init           = nft_dup_ipv6_init,
+       .dump           = nft_dup_ipv6_dump,
+};
+
+static const struct nla_policy nft_dup_ipv6_policy[NFTA_DUP_MAX + 1] = {
+       [NFTA_DUP_SREG_ADDR]    = { .type = NLA_U32 },
+       [NFTA_DUP_SREG_DEV]     = { .type = NLA_U32 },
+};
+
+static struct nft_expr_type nft_dup_ipv6_type __read_mostly = {
+       .family         = NFPROTO_IPV6,
+       .name           = "dup",
+       .ops            = &nft_dup_ipv6_ops,
+       .policy         = nft_dup_ipv6_policy,
+       .maxattr        = NFTA_DUP_MAX,
+       .owner          = THIS_MODULE,
+};
+
+static int __init nft_dup_ipv6_module_init(void)
+{
+       return nft_register_expr(&nft_dup_ipv6_type);
+}
+
+static void __exit nft_dup_ipv6_module_exit(void)
+{
+       nft_unregister_expr(&nft_dup_ipv6_type);
+}
+
+module_init(nft_dup_ipv6_module_init);
+module_exit(nft_dup_ipv6_module_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
+MODULE_ALIAS_NFT_AF_EXPR(AF_INET6, "dup");