1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _CONNTRACK_PROTO_GRE_H
3 #define _CONNTRACK_PROTO_GRE_H
4 #include <asm/byteorder.h>
5 #include <net/gre.h>
6 #include <net/pptp.h>
7 
8 struct nf_ct_gre {
9 	unsigned int stream_timeout;
10 	unsigned int timeout;
11 };
12 
13 #ifdef __KERNEL__
14 #include <net/netfilter/nf_conntrack_tuple.h>
15 
16 struct nf_conn;
17 
18 /* structure for original <-> reply keymap */
19 struct nf_ct_gre_keymap {
20 	struct list_head list;
21 	struct nf_conntrack_tuple tuple;
22 };
23 
24 /* add new tuple->key_reply pair to keymap */
25 int nf_ct_gre_keymap_add(struct nf_conn *ct, enum ip_conntrack_dir dir,
26 			 struct nf_conntrack_tuple *t);
27 
28 /* delete keymap entries */
29 void nf_ct_gre_keymap_destroy(struct nf_conn *ct);
30 
31 void nf_nat_need_gre(void);
32 
33 #endif /* __KERNEL__ */
34 #endif /* _CONNTRACK_PROTO_GRE_H */
35