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

 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
 9#define IP6TUNNEL_ERR_TIMEO (30*HZ)
10
11/* capable of sending packets */
12#define IP6_TNL_F_CAP_XMIT 0x10000
13/* capable of receiving packets */
14#define IP6_TNL_F_CAP_RCV 0x20000
15/* determine capability on a per-packet basis */
16#define IP6_TNL_F_CAP_PER_PACKET 0x40000
17
18struct __ip6_tnl_parm {
19	char name[IFNAMSIZ];	/* name of tunnel device */
20	int link;		/* ifindex of underlying L2 interface */
21	__u8 proto;		/* tunnel protocol */
22	__u8 encap_limit;	/* encapsulation limit for tunnel */
23	__u8 hop_limit;		/* hop limit for tunnel */
24	__be32 flowinfo;	/* traffic class and flowlabel for tunnel */
25	__u32 flags;		/* tunnel flags */
26	struct in6_addr laddr;	/* local tunnel end-point address */
27	struct in6_addr raddr;	/* remote tunnel end-point address */
28
29	__be16			i_flags;
30	__be16			o_flags;
31	__be32			i_key;
32	__be32			o_key;
33};
34
35/* IPv6 tunnel */
36struct ip6_tnl {
37	struct ip6_tnl __rcu *next;	/* next tunnel in list */
38	struct net_device *dev;	/* virtual device associated with tunnel */
39	struct net *net;	/* netns for packet i/o */
40	struct __ip6_tnl_parm parms;	/* tunnel configuration parameters */
41	struct flowi fl;	/* flowi template for xmit */
42	struct dst_entry *dst_cache;    /* cached dst */
43	u32 dst_cookie;
44
45	int err_count;
46	unsigned long err_time;
47
48	/* These fields used only by GRE */
49	__u32 i_seqno;	/* The last seen seqno	*/
50	__u32 o_seqno;	/* The last output seqno */
51	int hlen;       /* Precalculated GRE header length */
52	int mlink;
53};
54
55/* Tunnel encapsulation limit destination sub-option */
56
57struct ipv6_tlv_tnl_enc_lim {
58	__u8 type;		/* type-code for option         */
59	__u8 length;		/* option length                */
60	__u8 encap_limit;	/* tunnel encapsulation limit   */
61} __packed;
62
63struct dst_entry *ip6_tnl_dst_check(struct ip6_tnl *t);
64void ip6_tnl_dst_reset(struct ip6_tnl *t);
65void ip6_tnl_dst_store(struct ip6_tnl *t, struct dst_entry *dst);
66int ip6_tnl_rcv_ctl(struct ip6_tnl *t, const struct in6_addr *laddr,
67		const struct in6_addr *raddr);
68int ip6_tnl_xmit_ctl(struct ip6_tnl *t);
69__u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw);
70__u32 ip6_tnl_get_cap(struct ip6_tnl *t, const struct in6_addr *laddr,
71			     const struct in6_addr *raddr);
72
73static inline void ip6tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
74{
75	struct net_device_stats *stats = &dev->stats;
76	int pkt_len, err;
77
78	pkt_len = skb->len;
79	err = ip6_local_out(skb);
80
81	if (net_xmit_eval(err) == 0) {
82		struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
83		u64_stats_update_begin(&tstats->syncp);
84		tstats->tx_bytes += pkt_len;
85		tstats->tx_packets++;
86		u64_stats_update_end(&tstats->syncp);
87	} else {
88		stats->tx_errors++;
89		stats->tx_aborted_errors++;
90	}
91}
92#endif