| /* |
| * Copyright (c) 2008 Patrick McHardy <kaber@trash.net> |
| * |
| * 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. |
| * |
| * Development of this code funded by Astaro AG (http://www.astaro.com/) |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/list.h> |
| #include <linux/rbtree.h> |
| #include <linux/netlink.h> |
| #include <linux/netfilter.h> |
| #include <linux/netfilter/nf_tables.h> |
| #include <net/netfilter/nf_tables.h> |
| |
| struct nft_meta { |
| enum nft_meta_keys key; |
| }; |
| |
| static void nft_meta_eval(const struct nft_expr *expr, |
| struct nft_data *nfres, |
| struct nft_data *data, |
| const struct nft_pktinfo *pkt) |
| { |
| const struct nft_meta *meta = nft_expr_priv(expr); |
| struct sk_buff *skb = pkt->skb; |
| u32 val = data->data[0]; |
| |
| switch (meta->key) { |
| case NFT_META_MARK: |
| skb->mark = val; |
| break; |
| case NFT_META_PRIORITY: |
| skb->priority = val; |
| break; |
| case NFT_META_NFTRACE: |
| skb->nf_trace = val; |
| break; |
| #ifdef CONFIG_NETWORK_SECMARK |
| case NFT_META_SECMARK: |
| skb->secmark = val; |
| break; |
| #endif |
| default: |
| WARN_ON(1); |
| } |
| } |
| |
| static const struct nla_policy nft_meta_policy[NFTA_META_MAX + 1] = { |
| [NFTA_META_KEY] = { .type = NLA_U32 }, |
| }; |
| |
| static int nft_meta_init(const struct nft_expr *expr, struct nlattr *tb[]) |
| { |
| struct nft_meta *meta = nft_expr_priv(expr); |
| |
| if (tb[NFTA_META_KEY] == NULL) |
| return -EINVAL; |
| |
| meta->key = ntohl(nla_get_be32(tb[NFTA_META_KEY])); |
| switch (meta->key) { |
| case NFT_META_MARK: |
| case NFT_META_PRIORITY: |
| case NFT_META_NFTRACE: |
| #ifdef CONFIG_NETWORK_SECMARK |
| case NFT_META_SECMARK: |
| #endif |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int nft_meta_dump(struct sk_buff *skb, const struct nft_expr *expr) |
| { |
| struct nft_meta *meta = nft_expr_priv(expr); |
| |
| NLA_PUT_BE32(skb, NFTA_META_KEY, htonl(meta->key)); |
| return 0; |
| |
| nla_put_failure: |
| return -1; |
| } |
| |
| static struct nft_expr_ops meta_target __read_mostly = { |
| .name = "meta", |
| .size = NFT_EXPR_SIZE(sizeof(struct nft_meta)), |
| .owner = THIS_MODULE, |
| .eval = nft_meta_eval, |
| .init = nft_meta_init, |
| .dump = nft_meta_dump, |
| .policy = nft_meta_policy, |
| .maxattr = NFTA_META_MAX, |
| }; |
| |
| static int __init nft_meta_target_init(void) |
| { |
| return nft_register_expr(&meta_target); |
| } |
| |
| static void __exit nft_meta_target_exit(void) |
| { |
| nft_unregister_expr(&meta_target); |
| } |
| |
| module_init(nft_meta_target_init); |
| module_exit(nft_meta_target_exit); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); |
| MODULE_ALIAS_NFT_EXPR("meta"); |