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- /*
- * 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_tables.h>
- #include <net/netfilter/nf_nat.h>
- #include <net/netfilter/nft_redir.h>
- #include <net/netfilter/nf_nat_redirect.h>
- static void nft_redir_ipv6_eval(const struct nft_expr *expr,
- struct nft_regs *regs,
- const struct nft_pktinfo *pkt)
- {
- struct nft_redir *priv = nft_expr_priv(expr);
- struct nf_nat_range range;
- memset(&range, 0, sizeof(range));
- if (priv->sreg_proto_min) {
- range.min_proto.all =
- *(__be16 *)®s->data[priv->sreg_proto_min],
- range.max_proto.all =
- *(__be16 *)®s->data[priv->sreg_proto_max],
- range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
- }
- range.flags |= priv->flags;
- regs->verdict.code = nf_nat_redirect_ipv6(pkt->skb, &range, pkt->hook);
- }
- static struct nft_expr_type nft_redir_ipv6_type;
- static const struct nft_expr_ops nft_redir_ipv6_ops = {
- .type = &nft_redir_ipv6_type,
- .size = NFT_EXPR_SIZE(sizeof(struct nft_redir)),
- .eval = nft_redir_ipv6_eval,
- .init = nft_redir_init,
- .dump = nft_redir_dump,
- .validate = nft_redir_validate,
- };
- static struct nft_expr_type nft_redir_ipv6_type __read_mostly = {
- .family = NFPROTO_IPV6,
- .name = "redir",
- .ops = &nft_redir_ipv6_ops,
- .policy = nft_redir_policy,
- .maxattr = NFTA_REDIR_MAX,
- .owner = THIS_MODULE,
- };
- static int __init nft_redir_ipv6_module_init(void)
- {
- return nft_register_expr(&nft_redir_ipv6_type);
- }
- static void __exit nft_redir_ipv6_module_exit(void)
- {
- nft_unregister_expr(&nft_redir_ipv6_type);
- }
- module_init(nft_redir_ipv6_module_init);
- module_exit(nft_redir_ipv6_module_exit);
- MODULE_LICENSE("GPL");
- MODULE_AUTHOR("Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>");
- MODULE_ALIAS_NFT_AF_EXPR(AF_INET6, "redir");
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