Commit | Line | Data |
---|---|---|
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 | 7 | #include <linux/ip6_tunnel.h> |
039f5062 | 8 | #include <net/ip_tunnels.h> |
607f725f | 9 | #include <net/dst_cache.h> |
1da177e4 | 10 | |
c12b395a | 11 | #define IP6TUNNEL_ERR_TIMEO (30*HZ) |
12 | ||
1da177e4 LT |
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 | |
d0087b29 VN |
17 | /* determine capability on a per-packet basis */ |
18 | #define IP6_TNL_F_CAP_PER_PACKET 0x40000 | |
1da177e4 | 19 | |
c12b395a | 20 | struct __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 | }; | |
1da177e4 | 36 | |
c12b395a | 37 | /* IPv6 tunnel */ |
1da177e4 | 38 | struct ip6_tnl { |
6f0bcf15 | 39 | struct ip6_tnl __rcu *next; /* next tunnel in list */ |
1da177e4 | 40 | struct net_device *dev; /* virtual device associated with tunnel */ |
0bd87628 | 41 | struct net *net; /* netns for packet i/o */ |
c12b395a | 42 | struct __ip6_tnl_parm parms; /* tunnel configuration parameters */ |
1da177e4 | 43 | struct flowi fl; /* flowi template for xmit */ |
607f725f | 44 | struct dst_cache dst_cache; /* cached dst */ |
0d3c703a | 45 | struct gro_cells gro_cells; |
c12b395a | 46 | |
47 | int err_count; | |
48 | unsigned long err_time; | |
49 | ||
50 | /* These fields used only by GRE */ | |
51 | __u32 i_seqno; /* The last seen seqno */ | |
52 | __u32 o_seqno; /* The last output seqno */ | |
79ecb90e TH |
53 | int hlen; /* tun_hlen + encap_hlen */ |
54 | int tun_hlen; /* Precalculated header length */ | |
058214a4 TH |
55 | int encap_hlen; /* Encap header length (FOU,GUE) */ |
56 | struct ip_tunnel_encap encap; | |
c12b395a | 57 | int mlink; |
058214a4 | 58 | }; |
79ecb90e | 59 | |
058214a4 TH |
60 | struct ip6_tnl_encap_ops { |
61 | size_t (*encap_hlen)(struct ip_tunnel_encap *e); | |
62 | int (*build_header)(struct sk_buff *skb, struct ip_tunnel_encap *e, | |
63 | u8 *protocol, struct flowi6 *fl6); | |
1da177e4 LT |
64 | }; |
65 | ||
058214a4 TH |
66 | extern const struct ip6_tnl_encap_ops __rcu * |
67 | ip6tun_encaps[MAX_IPTUN_ENCAP_OPS]; | |
68 | ||
69 | int ip6_tnl_encap_add_ops(const struct ip6_tnl_encap_ops *ops, | |
70 | unsigned int num); | |
71 | int ip6_tnl_encap_del_ops(const struct ip6_tnl_encap_ops *ops, | |
72 | unsigned int num); | |
73 | int ip6_tnl_encap_setup(struct ip6_tnl *t, | |
74 | struct ip_tunnel_encap *ipencap); | |
75 | ||
76 | static inline int ip6_encap_hlen(struct ip_tunnel_encap *e) | |
77 | { | |
78 | const struct ip6_tnl_encap_ops *ops; | |
79 | int hlen = -EINVAL; | |
80 | ||
81 | if (e->type == TUNNEL_ENCAP_NONE) | |
82 | return 0; | |
83 | ||
84 | if (e->type >= MAX_IPTUN_ENCAP_OPS) | |
85 | return -EINVAL; | |
86 | ||
87 | rcu_read_lock(); | |
88 | ops = rcu_dereference(ip6tun_encaps[e->type]); | |
89 | if (likely(ops && ops->encap_hlen)) | |
90 | hlen = ops->encap_hlen(e); | |
91 | rcu_read_unlock(); | |
92 | ||
93 | return hlen; | |
94 | } | |
95 | ||
96 | static inline int ip6_tnl_encap(struct sk_buff *skb, struct ip6_tnl *t, | |
97 | u8 *protocol, struct flowi6 *fl6) | |
98 | { | |
99 | const struct ip6_tnl_encap_ops *ops; | |
100 | int ret = -EINVAL; | |
101 | ||
102 | if (t->encap.type == TUNNEL_ENCAP_NONE) | |
103 | return 0; | |
104 | ||
105 | if (t->encap.type >= MAX_IPTUN_ENCAP_OPS) | |
106 | return -EINVAL; | |
107 | ||
108 | rcu_read_lock(); | |
109 | ops = rcu_dereference(ip6tun_encaps[t->encap.type]); | |
110 | if (likely(ops && ops->build_header)) | |
111 | ret = ops->build_header(skb, &t->encap, protocol, fl6); | |
112 | rcu_read_unlock(); | |
113 | ||
114 | return ret; | |
115 | } | |
116 | ||
1da177e4 LT |
117 | /* Tunnel encapsulation limit destination sub-option */ |
118 | ||
119 | struct ipv6_tlv_tnl_enc_lim { | |
120 | __u8 type; /* type-code for option */ | |
121 | __u8 length; /* option length */ | |
122 | __u8 encap_limit; /* tunnel encapsulation limit */ | |
bc10502d | 123 | } __packed; |
1da177e4 | 124 | |
c12b395a | 125 | int ip6_tnl_rcv_ctl(struct ip6_tnl *t, const struct in6_addr *laddr, |
126 | const struct in6_addr *raddr); | |
0d3c703a TH |
127 | int ip6_tnl_rcv(struct ip6_tnl *tunnel, struct sk_buff *skb, |
128 | const struct tnl_ptk_info *tpi, struct metadata_dst *tun_dst, | |
129 | bool log_ecn_error); | |
d5005140 SK |
130 | int ip6_tnl_xmit_ctl(struct ip6_tnl *t, const struct in6_addr *laddr, |
131 | const struct in6_addr *raddr); | |
8eb30be0 TH |
132 | int ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev, __u8 dsfield, |
133 | struct flowi6 *fl6, int encap_limit, __u32 *pmtu, __u8 proto); | |
c12b395a | 134 | __u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw); |
135 | __u32 ip6_tnl_get_cap(struct ip6_tnl *t, const struct in6_addr *laddr, | |
136 | const struct in6_addr *raddr); | |
1728d4fa | 137 | struct net *ip6_tnl_get_link_net(const struct net_device *dev); |
ecf2c06a | 138 | int ip6_tnl_get_iflink(const struct net_device *dev); |
79ecb90e | 139 | int ip6_tnl_change_mtu(struct net_device *dev, int new_mtu); |
c12b395a | 140 | |
0efeff29 | 141 | #ifdef CONFIG_INET |
79b16aad DM |
142 | static inline void ip6tunnel_xmit(struct sock *sk, struct sk_buff *skb, |
143 | struct net_device *dev) | |
e8f72ea4 | 144 | { |
e8f72ea4 CW |
145 | int pkt_len, err; |
146 | ||
83cf9a25 | 147 | pkt_len = skb->len - skb_inner_network_offset(skb); |
33224b16 | 148 | err = ip6_local_out(dev_net(skb_dst(skb)->dev), sk, skb); |
039f5062 PS |
149 | if (unlikely(net_xmit_eval(err))) |
150 | pkt_len = -1; | |
151 | iptunnel_xmit_stats(dev, pkt_len); | |
e8f72ea4 | 152 | } |
1da177e4 | 153 | #endif |
0efeff29 | 154 | #endif |