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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> | |
c5441932 | 6 | #include <linux/if_tunnel.h> |
1da177e4 LT |
7 | #include <linux/ip6_tunnel.h> |
8 | ||
c12b395a | 9 | #define IP6TUNNEL_ERR_TIMEO (30*HZ) |
10 | ||
1da177e4 LT |
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 | |
d0087b29 VN |
15 | /* determine capability on a per-packet basis */ |
16 | #define IP6_TNL_F_CAP_PER_PACKET 0x40000 | |
1da177e4 | 17 | |
c12b395a | 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 */ | |
28 | ||
29 | __be16 i_flags; | |
30 | __be16 o_flags; | |
31 | __be32 i_key; | |
32 | __be32 o_key; | |
33 | }; | |
1da177e4 | 34 | |
cdf3464e | 35 | struct ip6_tnl_dst { |
70da5b5c MKL |
36 | seqlock_t lock; |
37 | struct dst_entry __rcu *dst; | |
cdf3464e MKL |
38 | u32 cookie; |
39 | }; | |
40 | ||
c12b395a | 41 | /* IPv6 tunnel */ |
1da177e4 | 42 | struct ip6_tnl { |
6f0bcf15 | 43 | struct ip6_tnl __rcu *next; /* next tunnel in list */ |
1da177e4 | 44 | struct net_device *dev; /* virtual device associated with tunnel */ |
0bd87628 | 45 | struct net *net; /* netns for packet i/o */ |
c12b395a | 46 | struct __ip6_tnl_parm parms; /* tunnel configuration parameters */ |
1da177e4 | 47 | struct flowi fl; /* flowi template for xmit */ |
cdf3464e | 48 | struct ip6_tnl_dst __percpu *dst_cache; /* cached dst */ |
c12b395a | 49 | |
50 | int err_count; | |
51 | unsigned long err_time; | |
52 | ||
53 | /* These fields used only by GRE */ | |
54 | __u32 i_seqno; /* The last seen seqno */ | |
55 | __u32 o_seqno; /* The last output seqno */ | |
56 | int hlen; /* Precalculated GRE header length */ | |
57 | int mlink; | |
1da177e4 LT |
58 | }; |
59 | ||
60 | /* Tunnel encapsulation limit destination sub-option */ | |
61 | ||
62 | struct ipv6_tlv_tnl_enc_lim { | |
63 | __u8 type; /* type-code for option */ | |
64 | __u8 length; /* option length */ | |
65 | __u8 encap_limit; /* tunnel encapsulation limit */ | |
bc10502d | 66 | } __packed; |
1da177e4 | 67 | |
f230d1e8 | 68 | struct dst_entry *ip6_tnl_dst_get(struct ip6_tnl *t); |
cdf3464e MKL |
69 | int ip6_tnl_dst_init(struct ip6_tnl *t); |
70 | void ip6_tnl_dst_destroy(struct ip6_tnl *t); | |
c12b395a | 71 | void ip6_tnl_dst_reset(struct ip6_tnl *t); |
f230d1e8 | 72 | void ip6_tnl_dst_set(struct ip6_tnl *t, struct dst_entry *dst); |
c12b395a | 73 | int ip6_tnl_rcv_ctl(struct ip6_tnl *t, const struct in6_addr *laddr, |
74 | const struct in6_addr *raddr); | |
d5005140 SK |
75 | int ip6_tnl_xmit_ctl(struct ip6_tnl *t, const struct in6_addr *laddr, |
76 | const struct in6_addr *raddr); | |
c12b395a | 77 | __u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw); |
78 | __u32 ip6_tnl_get_cap(struct ip6_tnl *t, const struct in6_addr *laddr, | |
79 | const struct in6_addr *raddr); | |
1728d4fa | 80 | struct net *ip6_tnl_get_link_net(const struct net_device *dev); |
ecf2c06a | 81 | int ip6_tnl_get_iflink(const struct net_device *dev); |
c12b395a | 82 | |
79b16aad DM |
83 | static inline void ip6tunnel_xmit(struct sock *sk, struct sk_buff *skb, |
84 | struct net_device *dev) | |
e8f72ea4 CW |
85 | { |
86 | struct net_device_stats *stats = &dev->stats; | |
87 | int pkt_len, err; | |
88 | ||
83cf9a25 | 89 | pkt_len = skb->len - skb_inner_network_offset(skb); |
33224b16 | 90 | err = ip6_local_out(dev_net(skb_dst(skb)->dev), sk, skb); |
e8f72ea4 CW |
91 | |
92 | if (net_xmit_eval(err) == 0) { | |
b4fe85f9 | 93 | struct pcpu_sw_netstats *tstats = get_cpu_ptr(dev->tstats); |
e8f72ea4 CW |
94 | u64_stats_update_begin(&tstats->syncp); |
95 | tstats->tx_bytes += pkt_len; | |
96 | tstats->tx_packets++; | |
97 | u64_stats_update_end(&tstats->syncp); | |
b4fe85f9 | 98 | put_cpu_ptr(tstats); |
e8f72ea4 CW |
99 | } else { |
100 | stats->tx_errors++; | |
101 | stats->tx_aborted_errors++; | |
102 | } | |
103 | } | |
1da177e4 | 104 | #endif |