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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _NET_IP6_TUNNEL_H
2#define _NET_IP6_TUNNEL_H
3
4#include <linux/ipv6.h>
5#include <linux/netdevice.h>
Pravin B Shelarc5441932013-03-25 14:49:35 +00006#include <linux/if_tunnel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07007#include <linux/ip6_tunnel.h>
8
xeb@mail.ruc12b3952012-08-10 00:51:50 +00009#define IP6TUNNEL_ERR_TIMEO (30*HZ)
10
Linus Torvalds1da177e2005-04-16 15:20:36 -070011/* 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
Ville Nuorvalad0087b22012-06-28 18:15:52 +000015/* determine capability on a per-packet basis */
16#define IP6_TNL_F_CAP_PER_PACKET 0x40000
Linus Torvalds1da177e2005-04-16 15:20:36 -070017
xeb@mail.ruc12b3952012-08-10 00:51:50 +000018struct __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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070028
xeb@mail.ruc12b3952012-08-10 00:51:50 +000029 __be16 i_flags;
30 __be16 o_flags;
31 __be32 i_key;
32 __be32 o_key;
33};
34
35/* IPv6 tunnel */
Linus Torvalds1da177e2005-04-16 15:20:36 -070036struct ip6_tnl {
Eric Dumazet6f0bcf12010-10-24 21:33:16 +000037 struct ip6_tnl __rcu *next; /* next tunnel in list */
Linus Torvalds1da177e2005-04-16 15:20:36 -070038 struct net_device *dev; /* virtual device associated with tunnel */
Nicolas Dichtel0bd876282013-08-13 17:51:12 +020039 struct net *net; /* netns for packet i/o */
xeb@mail.ruc12b3952012-08-10 00:51:50 +000040 struct __ip6_tnl_parm parms; /* tunnel configuration parameters */
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 struct flowi fl; /* flowi template for xmit */
42 struct dst_entry *dst_cache; /* cached dst */
43 u32 dst_cookie;
xeb@mail.ruc12b3952012-08-10 00:51:50 +000044
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;
Linus Torvalds1da177e2005-04-16 15:20:36 -070053};
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 */
Eric Dumazetbc105022010-06-03 03:21:52 -070061} __packed;
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
xeb@mail.ruc12b3952012-08-10 00:51:50 +000063struct 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);
Steffen Klassertd5005142014-11-05 08:02:48 +010068int ip6_tnl_xmit_ctl(struct ip6_tnl *t, const struct in6_addr *laddr,
69 const struct in6_addr *raddr);
xeb@mail.ruc12b3952012-08-10 00:51:50 +000070__u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw);
71__u32 ip6_tnl_get_cap(struct ip6_tnl *t, const struct in6_addr *laddr,
72 const struct in6_addr *raddr);
73
Cong Wange8f72ea2013-03-09 23:00:39 +000074static inline void ip6tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
75{
76 struct net_device_stats *stats = &dev->stats;
77 int pkt_len, err;
78
Cong Wange8f72ea2013-03-09 23:00:39 +000079 pkt_len = skb->len;
80 err = ip6_local_out(skb);
81
82 if (net_xmit_eval(err) == 0) {
Li RongQing8f849852014-01-04 13:57:59 +080083 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
Cong Wange8f72ea2013-03-09 23:00:39 +000084 u64_stats_update_begin(&tstats->syncp);
85 tstats->tx_bytes += pkt_len;
86 tstats->tx_packets++;
87 u64_stats_update_end(&tstats->syncp);
88 } else {
89 stats->tx_errors++;
90 stats->tx_aborted_errors++;
91 }
92}
Linus Torvalds1da177e2005-04-16 15:20:36 -070093#endif