| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright (c) 2017 Pablo M. Bermudo Garay <pablombg@gmail.com> |
| * |
| * 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/ipv6.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: |
| if (!ipv6_mod_enabled()) |
| break; |
| 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, |
| .reduce = nft_fib_reduce, |
| }; |
| |
| 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"); |
| MODULE_DESCRIPTION("nftables netdev fib lookups support"); |