2 * Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
3 * Copyright (c) 2013 Pablo Neira Ayuso <pablo@netfilter.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Development of this code funded by Astaro AG (http://www.astaro.com/)
12 #include <linux/init.h>
13 #include <linux/module.h>
14 #include <linux/netfilter_bridge.h>
15 #include <net/netfilter/nf_tables.h>
17 #include <linux/ipv6.h>
18 #include <net/netfilter/nf_tables_ipv4.h>
19 #include <net/netfilter/nf_tables_ipv6.h>
22 nft_do_chain_bridge(void *priv,
24 const struct nf_hook_state *state)
26 struct nft_pktinfo pkt;
28 switch (eth_hdr(skb)->h_proto) {
30 nft_set_pktinfo_ipv4_validate(&pkt, skb, state);
32 case htons(ETH_P_IPV6):
33 nft_set_pktinfo_ipv6_validate(&pkt, skb, state);
36 nft_set_pktinfo_unspec(&pkt, skb, state);
40 return nft_do_chain(&pkt, priv);
43 static struct nft_af_info nft_af_bridge __read_mostly = {
44 .family = NFPROTO_BRIDGE,
45 .nhooks = NF_BR_NUMHOOKS,
49 [NF_BR_PRE_ROUTING] = nft_do_chain_bridge,
50 [NF_BR_LOCAL_IN] = nft_do_chain_bridge,
51 [NF_BR_FORWARD] = nft_do_chain_bridge,
52 [NF_BR_LOCAL_OUT] = nft_do_chain_bridge,
53 [NF_BR_POST_ROUTING] = nft_do_chain_bridge,
57 static int nf_tables_bridge_init_net(struct net *net)
59 net->nft.bridge = kmalloc(sizeof(struct nft_af_info), GFP_KERNEL);
60 if (net->nft.bridge == NULL)
63 memcpy(net->nft.bridge, &nft_af_bridge, sizeof(nft_af_bridge));
65 if (nft_register_afinfo(net, net->nft.bridge) < 0)
70 kfree(net->nft.bridge);
74 static void nf_tables_bridge_exit_net(struct net *net)
76 nft_unregister_afinfo(net, net->nft.bridge);
77 kfree(net->nft.bridge);
80 static struct pernet_operations nf_tables_bridge_net_ops = {
81 .init = nf_tables_bridge_init_net,
82 .exit = nf_tables_bridge_exit_net,
85 static const struct nf_chain_type filter_bridge = {
87 .type = NFT_CHAIN_T_DEFAULT,
88 .family = NFPROTO_BRIDGE,
90 .hook_mask = (1 << NF_BR_PRE_ROUTING) |
91 (1 << NF_BR_LOCAL_IN) |
92 (1 << NF_BR_FORWARD) |
93 (1 << NF_BR_LOCAL_OUT) |
94 (1 << NF_BR_POST_ROUTING),
97 static void nf_br_saveroute(const struct sk_buff *skb,
98 struct nf_queue_entry *entry)
102 static int nf_br_reroute(struct net *net, struct sk_buff *skb,
103 const struct nf_queue_entry *entry)
108 static __sum16 nf_br_checksum(struct sk_buff *skb, unsigned int hook,
109 unsigned int dataoff, u_int8_t protocol)
114 static __sum16 nf_br_checksum_partial(struct sk_buff *skb, unsigned int hook,
115 unsigned int dataoff, unsigned int len,
121 static int nf_br_route(struct net *net, struct dst_entry **dst,
122 struct flowi *fl, bool strict __always_unused)
127 static const struct nf_afinfo nf_br_afinfo = {
129 .checksum = nf_br_checksum,
130 .checksum_partial = nf_br_checksum_partial,
131 .route = nf_br_route,
132 .saveroute = nf_br_saveroute,
133 .reroute = nf_br_reroute,
137 static int __init nf_tables_bridge_init(void)
141 nf_register_afinfo(&nf_br_afinfo);
142 ret = nft_register_chain_type(&filter_bridge);
146 ret = register_pernet_subsys(&nf_tables_bridge_net_ops);
153 nft_unregister_chain_type(&filter_bridge);
155 nf_unregister_afinfo(&nf_br_afinfo);
159 static void __exit nf_tables_bridge_exit(void)
161 unregister_pernet_subsys(&nf_tables_bridge_net_ops);
162 nft_unregister_chain_type(&filter_bridge);
163 nf_unregister_afinfo(&nf_br_afinfo);
166 module_init(nf_tables_bridge_init);
167 module_exit(nf_tables_bridge_exit);
169 MODULE_LICENSE("GPL");
170 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
171 MODULE_ALIAS_NFT_FAMILY(AF_BRIDGE);