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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
6392c226 PBG |
2 | /* |
3 | * Copyright (c) 2017 Pablo M. Bermudo Garay <pablombg@gmail.com> | |
4 | * | |
6392c226 PBG |
5 | * This code is based on net/netfilter/nft_fib_inet.c, written by |
6 | * Florian Westphal <fw@strlen.de>. | |
7 | */ | |
8 | ||
9 | #include <linux/kernel.h> | |
10 | #include <linux/init.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/netlink.h> | |
13 | #include <linux/netfilter.h> | |
14 | #include <linux/netfilter/nf_tables.h> | |
15 | #include <net/netfilter/nf_tables_core.h> | |
16 | #include <net/netfilter/nf_tables.h> | |
88209141 | 17 | #include <net/ipv6.h> |
6392c226 PBG |
18 | |
19 | #include <net/netfilter/nft_fib.h> | |
20 | ||
21 | static void nft_fib_netdev_eval(const struct nft_expr *expr, | |
22 | struct nft_regs *regs, | |
23 | const struct nft_pktinfo *pkt) | |
24 | { | |
25 | const struct nft_fib *priv = nft_expr_priv(expr); | |
26 | ||
27 | switch (ntohs(pkt->skb->protocol)) { | |
28 | case ETH_P_IP: | |
29 | switch (priv->result) { | |
30 | case NFT_FIB_RESULT_OIF: | |
31 | case NFT_FIB_RESULT_OIFNAME: | |
32 | return nft_fib4_eval(expr, regs, pkt); | |
33 | case NFT_FIB_RESULT_ADDRTYPE: | |
34 | return nft_fib4_eval_type(expr, regs, pkt); | |
35 | } | |
36 | break; | |
37 | case ETH_P_IPV6: | |
88209141 LB |
38 | if (!ipv6_mod_enabled()) |
39 | break; | |
6392c226 PBG |
40 | switch (priv->result) { |
41 | case NFT_FIB_RESULT_OIF: | |
42 | case NFT_FIB_RESULT_OIFNAME: | |
43 | return nft_fib6_eval(expr, regs, pkt); | |
44 | case NFT_FIB_RESULT_ADDRTYPE: | |
45 | return nft_fib6_eval_type(expr, regs, pkt); | |
46 | } | |
47 | break; | |
48 | } | |
49 | ||
50 | regs->verdict.code = NFT_BREAK; | |
51 | } | |
52 | ||
53 | static struct nft_expr_type nft_fib_netdev_type; | |
54 | static const struct nft_expr_ops nft_fib_netdev_ops = { | |
55 | .type = &nft_fib_netdev_type, | |
56 | .size = NFT_EXPR_SIZE(sizeof(struct nft_fib)), | |
57 | .eval = nft_fib_netdev_eval, | |
58 | .init = nft_fib_init, | |
59 | .dump = nft_fib_dump, | |
60 | .validate = nft_fib_validate, | |
3c1eb413 | 61 | .reduce = nft_fib_reduce, |
6392c226 PBG |
62 | }; |
63 | ||
64 | static struct nft_expr_type nft_fib_netdev_type __read_mostly = { | |
65 | .family = NFPROTO_NETDEV, | |
66 | .name = "fib", | |
67 | .ops = &nft_fib_netdev_ops, | |
68 | .policy = nft_fib_policy, | |
69 | .maxattr = NFTA_FIB_MAX, | |
70 | .owner = THIS_MODULE, | |
71 | }; | |
72 | ||
73 | static int __init nft_fib_netdev_module_init(void) | |
74 | { | |
75 | return nft_register_expr(&nft_fib_netdev_type); | |
76 | } | |
77 | ||
78 | static void __exit nft_fib_netdev_module_exit(void) | |
79 | { | |
80 | nft_unregister_expr(&nft_fib_netdev_type); | |
81 | } | |
82 | ||
83 | module_init(nft_fib_netdev_module_init); | |
84 | module_exit(nft_fib_netdev_module_exit); | |
85 | ||
86 | MODULE_LICENSE("GPL"); | |
87 | MODULE_AUTHOR("Pablo M. Bermudo Garay <pablombg@gmail.com>"); | |
88 | MODULE_ALIAS_NFT_AF_EXPR(5, "fib"); | |
4cacc395 | 89 | MODULE_DESCRIPTION("nftables netdev fib lookups support"); |