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1da177e4 LT |
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 | ||
c12b395a | 8 | #define IP6TUNNEL_ERR_TIMEO (30*HZ) |
9 | ||
1da177e4 LT |
10 | /* capable of sending packets */ |
11 | #define IP6_TNL_F_CAP_XMIT 0x10000 | |
12 | /* capable of receiving packets */ | |
13 | #define IP6_TNL_F_CAP_RCV 0x20000 | |
d0087b29 VN |
14 | /* determine capability on a per-packet basis */ |
15 | #define IP6_TNL_F_CAP_PER_PACKET 0x40000 | |
1da177e4 | 16 | |
c12b395a | 17 | struct __ip6_tnl_parm { |
18 | char name[IFNAMSIZ]; /* name of tunnel device */ | |
19 | int link; /* ifindex of underlying L2 interface */ | |
20 | __u8 proto; /* tunnel protocol */ | |
21 | __u8 encap_limit; /* encapsulation limit for tunnel */ | |
22 | __u8 hop_limit; /* hop limit for tunnel */ | |
23 | __be32 flowinfo; /* traffic class and flowlabel for tunnel */ | |
24 | __u32 flags; /* tunnel flags */ | |
25 | struct in6_addr laddr; /* local tunnel end-point address */ | |
26 | struct in6_addr raddr; /* remote tunnel end-point address */ | |
27 | ||
28 | __be16 i_flags; | |
29 | __be16 o_flags; | |
30 | __be32 i_key; | |
31 | __be32 o_key; | |
32 | }; | |
1da177e4 | 33 | |
c12b395a | 34 | /* IPv6 tunnel */ |
1da177e4 | 35 | struct ip6_tnl { |
6f0bcf15 | 36 | struct ip6_tnl __rcu *next; /* next tunnel in list */ |
1da177e4 | 37 | struct net_device *dev; /* virtual device associated with tunnel */ |
c12b395a | 38 | struct __ip6_tnl_parm parms; /* tunnel configuration parameters */ |
1da177e4 LT |
39 | struct flowi fl; /* flowi template for xmit */ |
40 | struct dst_entry *dst_cache; /* cached dst */ | |
41 | u32 dst_cookie; | |
c12b395a | 42 | |
43 | int err_count; | |
44 | unsigned long err_time; | |
45 | ||
46 | /* These fields used only by GRE */ | |
47 | __u32 i_seqno; /* The last seen seqno */ | |
48 | __u32 o_seqno; /* The last output seqno */ | |
49 | int hlen; /* Precalculated GRE header length */ | |
50 | int mlink; | |
1da177e4 LT |
51 | }; |
52 | ||
53 | /* Tunnel encapsulation limit destination sub-option */ | |
54 | ||
55 | struct ipv6_tlv_tnl_enc_lim { | |
56 | __u8 type; /* type-code for option */ | |
57 | __u8 length; /* option length */ | |
58 | __u8 encap_limit; /* tunnel encapsulation limit */ | |
bc10502d | 59 | } __packed; |
1da177e4 | 60 | |
c12b395a | 61 | struct dst_entry *ip6_tnl_dst_check(struct ip6_tnl *t); |
62 | void ip6_tnl_dst_reset(struct ip6_tnl *t); | |
63 | void ip6_tnl_dst_store(struct ip6_tnl *t, struct dst_entry *dst); | |
64 | int ip6_tnl_rcv_ctl(struct ip6_tnl *t, const struct in6_addr *laddr, | |
65 | const struct in6_addr *raddr); | |
66 | int ip6_tnl_xmit_ctl(struct ip6_tnl *t); | |
67 | __u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw); | |
68 | __u32 ip6_tnl_get_cap(struct ip6_tnl *t, const struct in6_addr *laddr, | |
69 | const struct in6_addr *raddr); | |
70 | ||
e8f72ea4 CW |
71 | static inline void ip6tunnel_xmit(struct sk_buff *skb, struct net_device *dev) |
72 | { | |
73 | struct net_device_stats *stats = &dev->stats; | |
74 | int pkt_len, err; | |
75 | ||
76 | nf_reset(skb); | |
77 | pkt_len = skb->len; | |
78 | err = ip6_local_out(skb); | |
79 | ||
80 | if (net_xmit_eval(err) == 0) { | |
81 | struct pcpu_tstats *tstats = this_cpu_ptr(dev->tstats); | |
82 | u64_stats_update_begin(&tstats->syncp); | |
83 | tstats->tx_bytes += pkt_len; | |
84 | tstats->tx_packets++; | |
85 | u64_stats_update_end(&tstats->syncp); | |
86 | } else { | |
87 | stats->tx_errors++; | |
88 | stats->tx_aborted_errors++; | |
89 | } | |
90 | } | |
1da177e4 | 91 | #endif |