linux-imx

/* SPDX-License-Identifier: GPL-2.0 */

#ifndef _NET_IP6_TUNNEL_H

#define _NET_IP6_TUNNEL_H

​

#include <linux/ipv6.h>

#include <linux/netdevice.h>

#include <linux/if_tunnel.h>

#include <linux/ip6_tunnel.h>

#include <net/ip_tunnels.h>

#include <net/dst_cache.h>

​

#define IP6TUNNEL_ERR_TIMEO (30*HZ)

​

/* capable of sending packets */

#define IP6_TNL_F_CAP_XMIT 0x10000

/* capable of receiving packets */

#define IP6_TNL_F_CAP_RCV 0x20000

/* determine capability on a per-packet basis */

#define IP6_TNL_F_CAP_PER_PACKET 0x40000

​

struct __ip6_tnl_parm {

    char name[IFNAMSIZ];    /* name of tunnel device */

    int link;       /* ifindex of underlying L2 interface */

    __u8 proto;     /* tunnel protocol */

    __u8 encap_limit;   /* encapsulation limit for tunnel */

    __u8 hop_limit;     /* hop limit for tunnel */

    bool collect_md;

    __be32 flowinfo;    /* traffic class and flowlabel for tunnel */

    __u32 flags;        /* tunnel flags */

    struct in6_addr laddr;  /* local tunnel end-point address */

    struct in6_addr raddr;  /* remote tunnel end-point address */

​

    __be16          i_flags;

    __be16          o_flags;

    __be32          i_key;

    __be32          o_key;

​

    __u32           fwmark;

    __u32           index;  /* ERSPAN type II index */

    __u8            erspan_ver; /* ERSPAN version */

    __u8            dir;    /* direction */

    __u16           hwid;   /* hwid */

};

​

/* IPv6 tunnel */

struct ip6_tnl {

    struct ip6_tnl __rcu *next; /* next tunnel in list */

    struct net_device *dev; /* virtual device associated with tunnel */

    struct net *net;    /* netns for packet i/o */

    struct __ip6_tnl_parm parms;    /* tunnel configuration parameters */

    struct flowi fl;    /* flowi template for xmit */

    struct dst_cache dst_cache; /* cached dst */

    struct gro_cells gro_cells;

​

    int err_count;

    unsigned long err_time;

​

    /* These fields used only by GRE */

    __u32 i_seqno;  /* The last seen seqno  */

    __u32 o_seqno;  /* The last output seqno */

    int hlen;       /* tun_hlen + encap_hlen */

    int tun_hlen;   /* Precalculated header length */

    int encap_hlen; /* Encap header length (FOU,GUE) */