1 // SPDX-License-Identifier: GPL-2.0-only
2 #include <linux/kernel.h>
3 #include <linux/init.h>
4 #include <linux/module.h>
5 #include <linux/netfilter.h>
6 #include <linux/rhashtable.h>
7 #include <net/netfilter/nf_flow_table.h>
8 #include <net/netfilter/nf_tables.h>
11 nf_flow_offload_inet_hook(void *priv, struct sk_buff *skb,
12 const struct nf_hook_state *state)
14 switch (skb->protocol) {
16 return nf_flow_offload_ip_hook(priv, skb, state);
17 case htons(ETH_P_IPV6):
18 return nf_flow_offload_ipv6_hook(priv, skb, state);
24 static int nf_flow_rule_route_inet(struct net *net,
25 const struct flow_offload *flow,
26 enum flow_offload_tuple_dir dir,
27 struct nf_flow_rule *flow_rule)
29 const struct flow_offload_tuple *flow_tuple = &flow->tuplehash[dir].tuple;
32 switch (flow_tuple->l3proto) {
34 err = nf_flow_rule_route_ipv4(net, flow, dir, flow_rule);
37 err = nf_flow_rule_route_ipv6(net, flow, dir, flow_rule);
47 static struct nf_flowtable_type flowtable_inet = {
48 .family = NFPROTO_INET,
49 .init = nf_flow_table_init,
50 .setup = nf_flow_table_offload_setup,
51 .action = nf_flow_rule_route_inet,
52 .free = nf_flow_table_free,
53 .hook = nf_flow_offload_inet_hook,
57 static int __init nf_flow_inet_module_init(void)
59 nft_register_flowtable_type(&flowtable_inet);
64 static void __exit nf_flow_inet_module_exit(void)
66 nft_unregister_flowtable_type(&flowtable_inet);
69 module_init(nf_flow_inet_module_init);
70 module_exit(nf_flow_inet_module_exit);
72 MODULE_LICENSE("GPL");
73 MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
74 MODULE_ALIAS_NF_FLOWTABLE(1); /* NFPROTO_INET */
75 MODULE_DESCRIPTION("Netfilter flow table mixed IPv4/IPv6 module");