80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
/*
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* Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
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* Copyright (c) 2013 Pablo Neira Ayuso <pablo@netfilter.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Development of this code funded by Astaro AG (http://www.astaro.com/)
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/netfilter_bridge.h>
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#include <net/netfilter/nf_tables.h>
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#include <linux/ip.h>
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#include <linux/ipv6.h>
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#include <net/netfilter/nf_tables_ipv4.h>
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#include <net/netfilter/nf_tables_ipv6.h>
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static unsigned int
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nft_do_chain_bridge(void *priv,
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struct sk_buff *skb,
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const struct nf_hook_state *state)
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{
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struct nft_pktinfo pkt;
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nft_set_pktinfo(&pkt, skb, state);
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switch (eth_hdr(skb)->h_proto) {
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case htons(ETH_P_IP):
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nft_set_pktinfo_ipv4_validate(&pkt, skb);
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break;
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case htons(ETH_P_IPV6):
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nft_set_pktinfo_ipv6_validate(&pkt, skb);
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break;
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default:
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nft_set_pktinfo_unspec(&pkt, skb);
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break;
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}
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return nft_do_chain(&pkt, priv);
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}
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static const struct nf_chain_type filter_bridge = {
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.name = "filter",
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.type = NFT_CHAIN_T_DEFAULT,
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.family = NFPROTO_BRIDGE,
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.owner = THIS_MODULE,
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.hook_mask = (1 << NF_BR_PRE_ROUTING) |
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(1 << NF_BR_LOCAL_IN) |
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(1 << NF_BR_FORWARD) |
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(1 << NF_BR_LOCAL_OUT) |
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(1 << NF_BR_POST_ROUTING),
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.hooks = {
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[NF_BR_PRE_ROUTING] = nft_do_chain_bridge,
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[NF_BR_LOCAL_IN] = nft_do_chain_bridge,
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[NF_BR_FORWARD] = nft_do_chain_bridge,
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[NF_BR_LOCAL_OUT] = nft_do_chain_bridge,
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[NF_BR_POST_ROUTING] = nft_do_chain_bridge,
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},
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};
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static int __init nf_tables_bridge_init(void)
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{
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return nft_register_chain_type(&filter_bridge);
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}
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static void __exit nf_tables_bridge_exit(void)
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{
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nft_unregister_chain_type(&filter_bridge);
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}
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module_init(nf_tables_bridge_init);
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module_exit(nf_tables_bridge_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
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MODULE_ALIAS_NFT_CHAIN(AF_BRIDGE, "filter");
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