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/*
* Copyright (c) 2017 Pablo M. Bermudo Garay <pablombg@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.
*
* This code is based on net/netfilter/nft_fib_inet.c, written by
* Florian Westphal <fw@strlen.de>.
*/
#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_core.h>
#include <net/netfilter/nf_tables.h>
#include <net/netfilter/nft_fib.h>
static void nft_fib_netdev_eval(const struct nft_expr *expr,
struct nft_regs *regs,
const struct nft_pktinfo *pkt)
{
const struct nft_fib *priv = nft_expr_priv(expr);
switch (ntohs(pkt->skb->protocol)) {
case ETH_P_IP:
switch (priv->result) {
case NFT_FIB_RESULT_OIF:
case NFT_FIB_RESULT_OIFNAME:
return nft_fib4_eval(expr, regs, pkt);
case NFT_FIB_RESULT_ADDRTYPE:
return nft_fib4_eval_type(expr, regs, pkt);
}
break;
case ETH_P_IPV6:
switch (priv->result) {
case NFT_FIB_RESULT_OIF:
case NFT_FIB_RESULT_OIFNAME:
return nft_fib6_eval(expr, regs, pkt);
case NFT_FIB_RESULT_ADDRTYPE:
return nft_fib6_eval_type(expr, regs, pkt);
}
break;
}
regs->verdict.code = NFT_BREAK;
}
static struct nft_expr_type nft_fib_netdev_type;
static const struct nft_expr_ops nft_fib_netdev_ops = {
.type = &nft_fib_netdev_type,
.size = NFT_EXPR_SIZE(sizeof(struct nft_fib)),
.eval = nft_fib_netdev_eval,
.init = nft_fib_init,
.dump = nft_fib_dump,
.validate = nft_fib_validate,
};
static struct nft_expr_type nft_fib_netdev_type __read_mostly = {
.family = NFPROTO_NETDEV,
.name = "fib",
.ops = &nft_fib_netdev_ops,
.policy = nft_fib_policy,
.maxattr = NFTA_FIB_MAX,
.owner = THIS_MODULE,
};
static int __init nft_fib_netdev_module_init(void)
{
return nft_register_expr(&nft_fib_netdev_type);
}
static void __exit nft_fib_netdev_module_exit(void)
{
nft_unregister_expr(&nft_fib_netdev_type);
}
module_init(nft_fib_netdev_module_init);
module_exit(nft_fib_netdev_module_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Pablo M. Bermudo Garay <pablombg@gmail.com>");
MODULE_ALIAS_NFT_AF_EXPR(5, "fib");
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