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>
9 #define IP6TUNNEL_ERR_TIMEO (30*HZ)
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
18 struct __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 */
37 struct ip6_tnl __rcu *next; /* next tunnel in list */
38 struct net_device *dev; /* virtual device associated with tunnel */
39 struct __ip6_tnl_parm parms; /* tunnel configuration parameters */
40 struct flowi fl; /* flowi template for xmit */
41 struct dst_entry *dst_cache; /* cached dst */
45 unsigned long err_time;
47 /* These fields used only by GRE */
48 __u32 i_seqno; /* The last seen seqno */
49 __u32 o_seqno; /* The last output seqno */
50 int hlen; /* Precalculated GRE header length */
54 /* Tunnel encapsulation limit destination sub-option */
56 struct ipv6_tlv_tnl_enc_lim {
57 __u8 type; /* type-code for option */
58 __u8 length; /* option length */
59 __u8 encap_limit; /* tunnel encapsulation limit */
62 struct dst_entry *ip6_tnl_dst_check(struct ip6_tnl *t);
63 void ip6_tnl_dst_reset(struct ip6_tnl *t);
64 void ip6_tnl_dst_store(struct ip6_tnl *t, struct dst_entry *dst);
65 int ip6_tnl_rcv_ctl(struct ip6_tnl *t, const struct in6_addr *laddr,
66 const struct in6_addr *raddr);
67 int ip6_tnl_xmit_ctl(struct ip6_tnl *t);
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);
72 static inline void ip6tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
74 struct net_device_stats *stats = &dev->stats;
79 err = ip6_local_out(skb);
81 if (net_xmit_eval(err) == 0) {
82 struct pcpu_tstats *tstats = this_cpu_ptr(dev->tstats);
83 u64_stats_update_begin(&tstats->syncp);
84 tstats->tx_bytes += pkt_len;
86 u64_stats_update_end(&tstats->syncp);
89 stats->tx_aborted_errors++;