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git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/blob - include/net/ip6_tunnel.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _NET_IP6_TUNNEL_H
3 #define _NET_IP6_TUNNEL_H
5 #include <linux/ipv6.h>
6 #include <linux/netdevice.h>
7 #include <linux/if_tunnel.h>
8 #include <linux/ip6_tunnel.h>
9 #include <net/ip_tunnels.h>
10 #include <net/dst_cache.h>
12 #define IP6TUNNEL_ERR_TIMEO (30*HZ)
14 /* capable of sending packets */
15 #define IP6_TNL_F_CAP_XMIT 0x10000
16 /* capable of receiving packets */
17 #define IP6_TNL_F_CAP_RCV 0x20000
18 /* determine capability on a per-packet basis */
19 #define IP6_TNL_F_CAP_PER_PACKET 0x40000
21 struct __ip6_tnl_parm
{
22 char name
[IFNAMSIZ
]; /* name of tunnel device */
23 int link
; /* ifindex of underlying L2 interface */
24 __u8 proto
; /* tunnel protocol */
25 __u8 encap_limit
; /* encapsulation limit for tunnel */
26 __u8 hop_limit
; /* hop limit for tunnel */
28 __be32 flowinfo
; /* traffic class and flowlabel for tunnel */
29 __u32 flags
; /* tunnel flags */
30 struct in6_addr laddr
; /* local tunnel end-point address */
31 struct in6_addr raddr
; /* remote tunnel end-point address */
39 __u32 index
; /* ERSPAN type II index */
40 __u8 erspan_ver
; /* ERSPAN version */
41 __u8 dir
; /* direction */
42 __u16 hwid
; /* hwid */
47 struct ip6_tnl __rcu
*next
; /* next tunnel in list */
48 struct net_device
*dev
; /* virtual device associated with tunnel */
49 struct net
*net
; /* netns for packet i/o */
50 struct __ip6_tnl_parm parms
; /* tunnel configuration parameters */
51 struct flowi fl
; /* flowi template for xmit */
52 struct dst_cache dst_cache
; /* cached dst */
53 struct gro_cells gro_cells
;
56 unsigned long err_time
;
58 /* These fields used only by GRE */
59 __u32 i_seqno
; /* The last seen seqno */
60 __u32 o_seqno
; /* The last output seqno */
61 int hlen
; /* tun_hlen + encap_hlen */
62 int tun_hlen
; /* Precalculated header length */
63 int encap_hlen
; /* Encap header length (FOU,GUE) */
64 struct ip_tunnel_encap encap
;
68 struct ip6_tnl_encap_ops
{
69 size_t (*encap_hlen
)(struct ip_tunnel_encap
*e
);
70 int (*build_header
)(struct sk_buff
*skb
, struct ip_tunnel_encap
*e
,
71 u8
*protocol
, struct flowi6
*fl6
);
72 int (*err_handler
)(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
73 u8 type
, u8 code
, int offset
, __be32 info
);
78 extern const struct ip6_tnl_encap_ops __rcu
*
79 ip6tun_encaps
[MAX_IPTUN_ENCAP_OPS
];
81 int ip6_tnl_encap_add_ops(const struct ip6_tnl_encap_ops
*ops
,
83 int ip6_tnl_encap_del_ops(const struct ip6_tnl_encap_ops
*ops
,
85 int ip6_tnl_encap_setup(struct ip6_tnl
*t
,
86 struct ip_tunnel_encap
*ipencap
);
88 static inline int ip6_encap_hlen(struct ip_tunnel_encap
*e
)
90 const struct ip6_tnl_encap_ops
*ops
;
93 if (e
->type
== TUNNEL_ENCAP_NONE
)
96 if (e
->type
>= MAX_IPTUN_ENCAP_OPS
)
100 ops
= rcu_dereference(ip6tun_encaps
[e
->type
]);
101 if (likely(ops
&& ops
->encap_hlen
))
102 hlen
= ops
->encap_hlen(e
);
108 static inline int ip6_tnl_encap(struct sk_buff
*skb
, struct ip6_tnl
*t
,
109 u8
*protocol
, struct flowi6
*fl6
)
111 const struct ip6_tnl_encap_ops
*ops
;
114 if (t
->encap
.type
== TUNNEL_ENCAP_NONE
)
117 if (t
->encap
.type
>= MAX_IPTUN_ENCAP_OPS
)
121 ops
= rcu_dereference(ip6tun_encaps
[t
->encap
.type
]);
122 if (likely(ops
&& ops
->build_header
))
123 ret
= ops
->build_header(skb
, &t
->encap
, protocol
, fl6
);
129 /* Tunnel encapsulation limit destination sub-option */
131 struct ipv6_tlv_tnl_enc_lim
{
132 __u8 type
; /* type-code for option */
133 __u8 length
; /* option length */
134 __u8 encap_limit
; /* tunnel encapsulation limit */
137 int ip6_tnl_rcv_ctl(struct ip6_tnl
*t
, const struct in6_addr
*laddr
,
138 const struct in6_addr
*raddr
);
139 int ip6_tnl_rcv(struct ip6_tnl
*tunnel
, struct sk_buff
*skb
,
140 const struct tnl_ptk_info
*tpi
, struct metadata_dst
*tun_dst
,
142 int ip6_tnl_xmit_ctl(struct ip6_tnl
*t
, const struct in6_addr
*laddr
,
143 const struct in6_addr
*raddr
);
144 int ip6_tnl_xmit(struct sk_buff
*skb
, struct net_device
*dev
, __u8 dsfield
,
145 struct flowi6
*fl6
, int encap_limit
, __u32
*pmtu
, __u8 proto
);
146 __u16
ip6_tnl_parse_tlv_enc_lim(struct sk_buff
*skb
, __u8
*raw
);
147 __u32
ip6_tnl_get_cap(struct ip6_tnl
*t
, const struct in6_addr
*laddr
,
148 const struct in6_addr
*raddr
);
149 struct net
*ip6_tnl_get_link_net(const struct net_device
*dev
);
150 int ip6_tnl_get_iflink(const struct net_device
*dev
);
151 int ip6_tnl_change_mtu(struct net_device
*dev
, int new_mtu
);
153 static inline void ip6tunnel_xmit(struct sock
*sk
, struct sk_buff
*skb
,
154 struct net_device
*dev
)
158 memset(skb
->cb
, 0, sizeof(struct inet6_skb_parm
));
159 pkt_len
= skb
->len
- skb_inner_network_offset(skb
);
160 err
= ip6_local_out(dev_net(skb_dst(skb
)->dev
), sk
, skb
);
161 if (unlikely(net_xmit_eval(err
)))
163 iptunnel_xmit_stats(dev
, pkt_len
);