1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _IP6_TUNNEL_H
3 #define _IP6_TUNNEL_H
4 
5 #include <linux/types.h>
6 #include <linux/if.h>		/* For IFNAMSIZ. */
7 #include <linux/in6.h>		/* For struct in6_addr. */
8 
9 #define IPV6_TLV_TNL_ENCAP_LIMIT 4
10 #define IPV6_DEFAULT_TNL_ENCAP_LIMIT 4
11 
12 /* don't add encapsulation limit if one isn't present in inner packet */
13 #define IP6_TNL_F_IGN_ENCAP_LIMIT 0x1
14 /* copy the traffic class field from the inner packet */
15 #define IP6_TNL_F_USE_ORIG_TCLASS 0x2
16 /* copy the flowlabel from the inner packet */
17 #define IP6_TNL_F_USE_ORIG_FLOWLABEL 0x4
18 /* being used for Mobile IPv6 */
19 #define IP6_TNL_F_MIP6_DEV 0x8
20 /* copy DSCP from the outer packet */
21 #define IP6_TNL_F_RCV_DSCP_COPY 0x10
22 /* copy fwmark from inner packet */
23 #define IP6_TNL_F_USE_ORIG_FWMARK 0x20
24 /* allow remote endpoint on the local node */
25 #define IP6_TNL_F_ALLOW_LOCAL_REMOTE 0x40
26 
27 struct ip6_tnl_parm {
28 	char name[IFNAMSIZ];	/* name of tunnel device */
29 	int link;		/* ifindex of underlying L2 interface */
30 	__u8 proto;		/* tunnel protocol */
31 	__u8 encap_limit;	/* encapsulation limit for tunnel */
32 	__u8 hop_limit;		/* hop limit for tunnel */
33 	__be32 flowinfo;	/* traffic class and flowlabel for tunnel */
34 	__u32 flags;		/* tunnel flags */
35 	struct in6_addr laddr;	/* local tunnel end-point address */
36 	struct in6_addr raddr;	/* remote tunnel end-point address */
37 };
38 
39 struct ip6_tnl_parm2 {
40 	char name[IFNAMSIZ];	/* name of tunnel device */
41 	int link;		/* ifindex of underlying L2 interface */
42 	__u8 proto;		/* tunnel protocol */
43 	__u8 encap_limit;	/* encapsulation limit for tunnel */
44 	__u8 hop_limit;		/* hop limit for tunnel */
45 	__be32 flowinfo;	/* traffic class and flowlabel for tunnel */
46 	__u32 flags;		/* tunnel flags */
47 	struct in6_addr laddr;	/* local tunnel end-point address */
48 	struct in6_addr raddr;	/* remote tunnel end-point address */
49 
50 	__be16			i_flags;
51 	__be16			o_flags;
52 	__be32			i_key;
53 	__be32			o_key;
54 };
55 
56 #endif
57