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      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