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/ip6_tunnel.h>
8 #define IP6TUNNEL_ERR_TIMEO (30*HZ)
10 /* capable of sending packets */
11 #define IP6_TNL_F_CAP_XMIT 0x10000
12 /* capable of receiving packets */
13 #define IP6_TNL_F_CAP_RCV 0x20000
14 /* determine capability on a per-packet basis */
15 #define IP6_TNL_F_CAP_PER_PACKET 0x40000
17 struct __ip6_tnl_parm {
18 char name[IFNAMSIZ]; /* name of tunnel device */
19 int link; /* ifindex of underlying L2 interface */
20 __u8 proto; /* tunnel protocol */
21 __u8 encap_limit; /* encapsulation limit for tunnel */
22 __u8 hop_limit; /* hop limit for tunnel */
23 __be32 flowinfo; /* traffic class and flowlabel for tunnel */
24 __u32 flags; /* tunnel flags */
25 struct in6_addr laddr; /* local tunnel end-point address */
26 struct in6_addr raddr; /* remote tunnel end-point address */
36 struct ip6_tnl __rcu *next; /* next tunnel in list */
37 struct net_device *dev; /* virtual device associated with tunnel */
38 struct __ip6_tnl_parm parms; /* tunnel configuration parameters */
39 struct flowi fl; /* flowi template for xmit */
40 struct dst_entry *dst_cache; /* cached dst */
44 unsigned long err_time;
46 /* These fields used only by GRE */
47 __u32 i_seqno; /* The last seen seqno */
48 __u32 o_seqno; /* The last output seqno */
49 int hlen; /* Precalculated GRE header length */
53 /* Tunnel encapsulation limit destination sub-option */
55 struct ipv6_tlv_tnl_enc_lim {
56 __u8 type; /* type-code for option */
57 __u8 length; /* option length */
58 __u8 encap_limit; /* tunnel encapsulation limit */
61 struct dst_entry *ip6_tnl_dst_check(struct ip6_tnl *t);
62 void ip6_tnl_dst_reset(struct ip6_tnl *t);
63 void ip6_tnl_dst_store(struct ip6_tnl *t, struct dst_entry *dst);
64 int ip6_tnl_rcv_ctl(struct ip6_tnl *t, const struct in6_addr *laddr,
65 const struct in6_addr *raddr);
66 int ip6_tnl_xmit_ctl(struct ip6_tnl *t);
67 __u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw);
68 __u32 ip6_tnl_get_cap(struct ip6_tnl *t, const struct in6_addr *laddr,
69 const struct in6_addr *raddr);