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f6d0cbcf FW |
1 | /* |
2 | * This program is free software; you can redistribute it and/or modify | |
3 | * it under the terms of the GNU General Public License version 2 as | |
4 | * published by the Free Software Foundation. | |
5 | */ | |
6 | ||
7 | #include <linux/kernel.h> | |
8 | #include <linux/init.h> | |
9 | #include <linux/module.h> | |
10 | #include <linux/netlink.h> | |
11 | #include <linux/netfilter.h> | |
12 | #include <linux/netfilter/nf_tables.h> | |
13 | #include <net/netfilter/nf_tables_core.h> | |
14 | #include <net/netfilter/nf_tables.h> | |
15 | ||
16 | #include <net/netfilter/nft_fib.h> | |
17 | ||
18 | static void nft_fib_inet_eval(const struct nft_expr *expr, | |
19 | struct nft_regs *regs, | |
20 | const struct nft_pktinfo *pkt) | |
21 | { | |
22 | const struct nft_fib *priv = nft_expr_priv(expr); | |
23 | ||
24 | switch (pkt->pf) { | |
25 | case NFPROTO_IPV4: | |
26 | switch (priv->result) { | |
27 | case NFT_FIB_RESULT_OIF: | |
28 | case NFT_FIB_RESULT_OIFNAME: | |
29 | return nft_fib4_eval(expr, regs, pkt); | |
30 | case NFT_FIB_RESULT_ADDRTYPE: | |
31 | return nft_fib4_eval_type(expr, regs, pkt); | |
32 | } | |
33 | break; | |
34 | case NFPROTO_IPV6: | |
35 | switch (priv->result) { | |
36 | case NFT_FIB_RESULT_OIF: | |
37 | case NFT_FIB_RESULT_OIFNAME: | |
38 | return nft_fib6_eval(expr, regs, pkt); | |
39 | case NFT_FIB_RESULT_ADDRTYPE: | |
40 | return nft_fib6_eval_type(expr, regs, pkt); | |
41 | } | |
42 | break; | |
43 | } | |
44 | ||
45 | regs->verdict.code = NF_DROP; | |
46 | } | |
47 | ||
48 | static struct nft_expr_type nft_fib_inet_type; | |
49 | static const struct nft_expr_ops nft_fib_inet_ops = { | |
50 | .type = &nft_fib_inet_type, | |
51 | .size = NFT_EXPR_SIZE(sizeof(struct nft_fib)), | |
52 | .eval = nft_fib_inet_eval, | |
53 | .init = nft_fib_init, | |
54 | .dump = nft_fib_dump, | |
55 | .validate = nft_fib_validate, | |
56 | }; | |
57 | ||
58 | static struct nft_expr_type nft_fib_inet_type __read_mostly = { | |
59 | .family = NFPROTO_INET, | |
60 | .name = "fib", | |
61 | .ops = &nft_fib_inet_ops, | |
62 | .policy = nft_fib_policy, | |
63 | .maxattr = NFTA_FIB_MAX, | |
64 | .owner = THIS_MODULE, | |
65 | }; | |
66 | ||
67 | static int __init nft_fib_inet_module_init(void) | |
68 | { | |
69 | return nft_register_expr(&nft_fib_inet_type); | |
70 | } | |
71 | ||
72 | static void __exit nft_fib_inet_module_exit(void) | |
73 | { | |
74 | nft_unregister_expr(&nft_fib_inet_type); | |
75 | } | |
76 | ||
77 | module_init(nft_fib_inet_module_init); | |
78 | module_exit(nft_fib_inet_module_exit); | |
79 | ||
80 | MODULE_LICENSE("GPL"); | |
81 | MODULE_AUTHOR("Florian Westphal <fw@strlen.de>"); | |
82 | MODULE_ALIAS_NFT_AF_EXPR(1, "fib"); |