1 #ifndef _NET_IP6_TUNNEL_H
2 #define _NET_IP6_TUNNEL_H
4 #include <linux/ipv6.h>
5 #include <linux/netdevice.h>
6 #include <linux/if_tunnel.h>
7 #include <linux/ip6_tunnel.h>
8 #include <net/ip_tunnels.h>
10 #define IP6TUNNEL_ERR_TIMEO (30*HZ)
12 /* capable of sending packets */
13 #define IP6_TNL_F_CAP_XMIT 0x10000
14 /* capable of receiving packets */
15 #define IP6_TNL_F_CAP_RCV 0x20000
16 /* determine capability on a per-packet basis */
17 #define IP6_TNL_F_CAP_PER_PACKET 0x40000
19 struct __ip6_tnl_parm
{
20 char name
[IFNAMSIZ
]; /* name of tunnel device */
21 int link
; /* ifindex of underlying L2 interface */
22 __u8 proto
; /* tunnel protocol */
23 __u8 encap_limit
; /* encapsulation limit for tunnel */
24 __u8 hop_limit
; /* hop limit for tunnel */
25 __be32 flowinfo
; /* traffic class and flowlabel for tunnel */
26 __u32 flags
; /* tunnel flags */
27 struct in6_addr laddr
; /* local tunnel end-point address */
28 struct in6_addr raddr
; /* remote tunnel end-point address */
38 struct dst_entry __rcu
*dst
;
44 struct ip6_tnl __rcu
*next
; /* next tunnel in list */
45 struct net_device
*dev
; /* virtual device associated with tunnel */
46 struct net
*net
; /* netns for packet i/o */
47 struct __ip6_tnl_parm parms
; /* tunnel configuration parameters */
48 struct flowi fl
; /* flowi template for xmit */
49 struct ip6_tnl_dst __percpu
*dst_cache
; /* cached dst */
52 unsigned long err_time
;
54 /* These fields used only by GRE */
55 __u32 i_seqno
; /* The last seen seqno */
56 __u32 o_seqno
; /* The last output seqno */
57 int hlen
; /* Precalculated GRE header length */
61 /* Tunnel encapsulation limit destination sub-option */
63 struct ipv6_tlv_tnl_enc_lim
{
64 __u8 type
; /* type-code for option */
65 __u8 length
; /* option length */
66 __u8 encap_limit
; /* tunnel encapsulation limit */
69 struct dst_entry
*ip6_tnl_dst_get(struct ip6_tnl
*t
);
70 int ip6_tnl_dst_init(struct ip6_tnl
*t
);
71 void ip6_tnl_dst_destroy(struct ip6_tnl
*t
);
72 void ip6_tnl_dst_reset(struct ip6_tnl
*t
);
73 void ip6_tnl_dst_set(struct ip6_tnl
*t
, struct dst_entry
*dst
);
74 int ip6_tnl_rcv_ctl(struct ip6_tnl
*t
, const struct in6_addr
*laddr
,
75 const struct in6_addr
*raddr
);
76 int ip6_tnl_xmit_ctl(struct ip6_tnl
*t
, const struct in6_addr
*laddr
,
77 const struct in6_addr
*raddr
);
78 __u16
ip6_tnl_parse_tlv_enc_lim(struct sk_buff
*skb
, __u8
*raw
);
79 __u32
ip6_tnl_get_cap(struct ip6_tnl
*t
, const struct in6_addr
*laddr
,
80 const struct in6_addr
*raddr
);
81 struct net
*ip6_tnl_get_link_net(const struct net_device
*dev
);
82 int ip6_tnl_get_iflink(const struct net_device
*dev
);
85 static inline void ip6tunnel_xmit(struct sock
*sk
, struct sk_buff
*skb
,
86 struct net_device
*dev
)
90 pkt_len
= skb
->len
- skb_inner_network_offset(skb
);
91 err
= ip6_local_out(dev_net(skb_dst(skb
)->dev
), sk
, skb
);
92 if (unlikely(net_xmit_eval(err
)))
94 iptunnel_xmit_stats(dev
, pkt_len
);
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