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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/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