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Tom Herbert8024e022014-07-13 19:49:37 -07001#ifndef __NET_UDP_TUNNEL_H
2#define __NET_UDP_TUNNEL_H
3
Andy Zhou6a93cc92014-09-16 17:31:17 -07004#include <net/ip_tunnels.h>
5#include <net/udp.h>
6
7#if IS_ENABLED(CONFIG_IPV6)
8#include <net/ipv6.h>
9#include <net/addrconf.h>
10#endif
11
Tom Herbert8024e022014-07-13 19:49:37 -070012struct udp_port_cfg {
13 u8 family;
14
15 /* Used only for kernel-created sockets */
16 union {
17 struct in_addr local_ip;
18#if IS_ENABLED(CONFIG_IPV6)
19 struct in6_addr local_ip6;
20#endif
21 };
22
23 union {
24 struct in_addr peer_ip;
25#if IS_ENABLED(CONFIG_IPV6)
26 struct in6_addr peer_ip6;
27#endif
28 };
29
30 __be16 local_udp_port;
31 __be16 peer_udp_port;
32 unsigned int use_udp_checksums:1,
33 use_udp6_tx_checksums:1,
Jiri Benca43a9ef2015-08-28 20:48:22 +020034 use_udp6_rx_checksums:1,
35 ipv6_v6only:1;
Tom Herbert8024e022014-07-13 19:49:37 -070036};
37
Andy Zhoufd384412014-09-16 17:31:16 -070038int udp_sock_create4(struct net *net, struct udp_port_cfg *cfg,
39 struct socket **sockp);
40
41#if IS_ENABLED(CONFIG_IPV6)
42int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg,
43 struct socket **sockp);
44#else
45static inline int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg,
46 struct socket **sockp)
47{
48 return 0;
49}
50#endif
51
52static inline int udp_sock_create(struct net *net,
53 struct udp_port_cfg *cfg,
54 struct socket **sockp)
55{
56 if (cfg->family == AF_INET)
57 return udp_sock_create4(net, cfg, sockp);
58
59 if (cfg->family == AF_INET6)
60 return udp_sock_create6(net, cfg, sockp);
61
62 return -EPFNOSUPPORT;
63}
Tom Herbert8024e022014-07-13 19:49:37 -070064
Andy Zhou6a93cc92014-09-16 17:31:17 -070065typedef int (*udp_tunnel_encap_rcv_t)(struct sock *sk, struct sk_buff *skb);
66typedef void (*udp_tunnel_encap_destroy_t)(struct sock *sk);
67
68struct udp_tunnel_sock_cfg {
69 void *sk_user_data; /* user data used by encap_rcv call back */
70 /* Used for setting up udp_sock fields, see udp.h for details */
71 __u8 encap_type;
72 udp_tunnel_encap_rcv_t encap_rcv;
73 udp_tunnel_encap_destroy_t encap_destroy;
74};
75
76/* Setup the given (UDP) sock to receive UDP encapsulated packets */
77void setup_udp_tunnel_sock(struct net *net, struct socket *sock,
78 struct udp_tunnel_sock_cfg *sock_cfg);
79
80/* Transmit the skb using UDP encapsulation. */
David Miller79b16aa2015-04-05 22:19:09 -040081int udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb,
Tom Herbertd998f8e2015-01-20 11:23:04 -080082 __be32 src, __be32 dst, __u8 tos, __u8 ttl,
83 __be16 df, __be16 src_port, __be16 dst_port,
84 bool xnet, bool nocheck);
Andy Zhou6a93cc92014-09-16 17:31:17 -070085
86#if IS_ENABLED(CONFIG_IPV6)
David Miller79b16aa2015-04-05 22:19:09 -040087int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk,
88 struct sk_buff *skb,
Tom Herbertd998f8e2015-01-20 11:23:04 -080089 struct net_device *dev, struct in6_addr *saddr,
90 struct in6_addr *daddr,
Andy Zhou6a93cc92014-09-16 17:31:17 -070091 __u8 prio, __u8 ttl, __be16 src_port,
Tom Herbertd998f8e2015-01-20 11:23:04 -080092 __be16 dst_port, bool nocheck);
Andy Zhou6a93cc92014-09-16 17:31:17 -070093#endif
94
95void udp_tunnel_sock_release(struct socket *sock);
96
Pravin B Shelarc29a70d2015-08-26 23:46:50 -070097struct metadata_dst *udp_tun_rx_dst(struct sk_buff *skb, unsigned short family,
98 __be16 flags, __be64 tunnel_id,
99 int md_size);
100
Andy Zhou6a93cc92014-09-16 17:31:17 -0700101static inline struct sk_buff *udp_tunnel_handle_offloads(struct sk_buff *skb,
102 bool udp_csum)
103{
104 int type = udp_csum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
105
106 return iptunnel_handle_offloads(skb, udp_csum, type);
107}
108
Jesse Grosscfdf1e12014-11-10 11:45:13 -0800109static inline void udp_tunnel_gro_complete(struct sk_buff *skb, int nhoff)
110{
111 struct udphdr *uh;
112
113 uh = (struct udphdr *)(skb->data + nhoff - sizeof(struct udphdr));
114 skb_shinfo(skb)->gso_type |= uh->check ?
115 SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
116}
117
Andy Zhou6a93cc92014-09-16 17:31:17 -0700118static inline void udp_tunnel_encap_enable(struct socket *sock)
119{
120#if IS_ENABLED(CONFIG_IPV6)
121 if (sock->sk->sk_family == PF_INET6)
122 ipv6_stub->udpv6_encap_enable();
123 else
124#endif
125 udp_encap_enable();
126}
127
Tom Herbert8024e022014-07-13 19:49:37 -0700128#endif