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);