1#ifndef _NET_IP6_TUNNEL_H
 2#define _NET_IP6_TUNNEL_H
 3
 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>
 9#include <net/dst_cache.h>
10
11#define IP6TUNNEL_ERR_TIMEO (30*HZ)
12
13/* capable of sending packets */
14#define IP6_TNL_F_CAP_XMIT 0x10000
15/* capable of receiving packets */
16#define IP6_TNL_F_CAP_RCV 0x20000
17/* determine capability on a per-packet basis */
18#define IP6_TNL_F_CAP_PER_PACKET 0x40000
19
20struct __ip6_tnl_parm {
21	char name[IFNAMSIZ];	/* name of tunnel device */
22	int link;		/* ifindex of underlying L2 interface */
23	__u8 proto;		/* tunnel protocol */
24	__u8 encap_limit;	/* encapsulation limit for tunnel */
25	__u8 hop_limit;		/* hop limit for tunnel */
26	__be32 flowinfo;	/* traffic class and flowlabel for tunnel */
27	__u32 flags;		/* tunnel flags */
28	struct in6_addr laddr;	/* local tunnel end-point address */
29	struct in6_addr raddr;	/* remote tunnel end-point address */
30
31	__be16			i_flags;
32	__be16			o_flags;
33	__be32			i_key;
34	__be32			o_key;
35};
36
37/* IPv6 tunnel */
 
38struct ip6_tnl {
39	struct ip6_tnl __rcu *next;	/* next tunnel in list */
40	struct net_device *dev;	/* virtual device associated with tunnel */
41	struct net *net;	/* netns for packet i/o */
42	struct __ip6_tnl_parm parms;	/* tunnel configuration parameters */
43	struct flowi fl;	/* flowi template for xmit */
44	struct dst_cache dst_cache;	/* cached dst */
45
46	int err_count;
47	unsigned long err_time;
48
49	/* These fields used only by GRE */
50	__u32 i_seqno;	/* The last seen seqno	*/
51	__u32 o_seqno;	/* The last output seqno */
52	int hlen;       /* Precalculated GRE header length */
53	int mlink;
54};
55
56/* Tunnel encapsulation limit destination sub-option */
57
58struct ipv6_tlv_tnl_enc_lim {
59	__u8 type;		/* type-code for option         */
60	__u8 length;		/* option length                */
61	__u8 encap_limit;	/* tunnel encapsulation limit   */
62} __packed;
63
64int ip6_tnl_rcv_ctl(struct ip6_tnl *t, const struct in6_addr *laddr,
65		const struct in6_addr *raddr);
66int ip6_tnl_xmit_ctl(struct ip6_tnl *t, const struct in6_addr *laddr,
67		     const struct in6_addr *raddr);
68__u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw);
69__u32 ip6_tnl_get_cap(struct ip6_tnl *t, const struct in6_addr *laddr,
70			     const struct in6_addr *raddr);
71struct net *ip6_tnl_get_link_net(const struct net_device *dev);
72int ip6_tnl_get_iflink(const struct net_device *dev);
73
74#ifdef CONFIG_INET
75static inline void ip6tunnel_xmit(struct sock *sk, struct sk_buff *skb,
76				  struct net_device *dev)
77{
78	int pkt_len, err;
79
80	pkt_len = skb->len - skb_inner_network_offset(skb);
81	err = ip6_local_out(dev_net(skb_dst(skb)->dev), sk, skb);
82	if (unlikely(net_xmit_eval(err)))
83		pkt_len = -1;
84	iptunnel_xmit_stats(dev, pkt_len);
85}
86#endif
87#endif

 1#ifndef _NET_IP6_TUNNEL_H
 2#define _NET_IP6_TUNNEL_H
 3
 4#include <linux/ipv6.h>
 5#include <linux/netdevice.h>
 
 6#include <linux/ip6_tunnel.h>
 
 
 
 
 7
 8/* capable of sending packets */
 9#define IP6_TNL_F_CAP_XMIT 0x10000
10/* capable of receiving packets */
11#define IP6_TNL_F_CAP_RCV 0x20000
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
12
13/* IPv6 tunnel */
14
15struct ip6_tnl {
16	struct ip6_tnl __rcu *next;	/* next tunnel in list */
17	struct net_device *dev;	/* virtual device associated with tunnel */
18	struct ip6_tnl_parm parms;	/* tunnel configuration parameters */
 
19	struct flowi fl;	/* flowi template for xmit */
20	struct dst_entry *dst_cache;    /* cached dst */
21	u32 dst_cookie;
 
 
 
 
 
 
 
 
22};
23
24/* Tunnel encapsulation limit destination sub-option */
25
26struct ipv6_tlv_tnl_enc_lim {
27	__u8 type;		/* type-code for option         */
28	__u8 length;		/* option length                */
29	__u8 encap_limit;	/* tunnel encapsulation limit   */
30} __packed;
31
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
32#endif