Commit | Line | Data |
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8024e028 TH |
1 | #ifndef __NET_UDP_TUNNEL_H |
2 | #define __NET_UDP_TUNNEL_H | |
3 | ||
6a93cc90 AZ |
4 | #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 | ||
8024e028 TH |
12 | struct 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, | |
a43a9ef6 JB |
34 | use_udp6_rx_checksums:1, |
35 | ipv6_v6only:1; | |
8024e028 TH |
36 | }; |
37 | ||
fd384412 AZ |
38 | int udp_sock_create4(struct net *net, struct udp_port_cfg *cfg, |
39 | struct socket **sockp); | |
40 | ||
41 | #if IS_ENABLED(CONFIG_IPV6) | |
42 | int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg, | |
43 | struct socket **sockp); | |
44 | #else | |
45 | static 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 | ||
52 | static 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 | } | |
8024e028 | 64 | |
6a93cc90 AZ |
65 | typedef int (*udp_tunnel_encap_rcv_t)(struct sock *sk, struct sk_buff *skb); |
66 | typedef void (*udp_tunnel_encap_destroy_t)(struct sock *sk); | |
38fd2af2 TH |
67 | typedef struct sk_buff **(*udp_tunnel_gro_receive_t)(struct sock *sk, |
68 | struct sk_buff **head, | |
69 | struct sk_buff *skb); | |
70 | typedef int (*udp_tunnel_gro_complete_t)(struct sock *sk, struct sk_buff *skb, | |
71 | int nhoff); | |
6a93cc90 AZ |
72 | |
73 | struct udp_tunnel_sock_cfg { | |
74 | void *sk_user_data; /* user data used by encap_rcv call back */ | |
75 | /* Used for setting up udp_sock fields, see udp.h for details */ | |
76 | __u8 encap_type; | |
77 | udp_tunnel_encap_rcv_t encap_rcv; | |
78 | udp_tunnel_encap_destroy_t encap_destroy; | |
38fd2af2 TH |
79 | udp_tunnel_gro_receive_t gro_receive; |
80 | udp_tunnel_gro_complete_t gro_complete; | |
6a93cc90 AZ |
81 | }; |
82 | ||
83 | /* Setup the given (UDP) sock to receive UDP encapsulated packets */ | |
84 | void setup_udp_tunnel_sock(struct net *net, struct socket *sock, | |
85 | struct udp_tunnel_sock_cfg *sock_cfg); | |
86 | ||
87 | /* Transmit the skb using UDP encapsulation. */ | |
039f5062 PS |
88 | void udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb, |
89 | __be32 src, __be32 dst, __u8 tos, __u8 ttl, | |
90 | __be16 df, __be16 src_port, __be16 dst_port, | |
91 | bool xnet, bool nocheck); | |
6a93cc90 AZ |
92 | |
93 | #if IS_ENABLED(CONFIG_IPV6) | |
79b16aad DM |
94 | int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk, |
95 | struct sk_buff *skb, | |
d998f8ef TH |
96 | struct net_device *dev, struct in6_addr *saddr, |
97 | struct in6_addr *daddr, | |
13461144 DB |
98 | __u8 prio, __u8 ttl, __be32 label, |
99 | __be16 src_port, __be16 dst_port, bool nocheck); | |
6a93cc90 AZ |
100 | #endif |
101 | ||
102 | void udp_tunnel_sock_release(struct socket *sock); | |
103 | ||
c29a70d2 PS |
104 | struct metadata_dst *udp_tun_rx_dst(struct sk_buff *skb, unsigned short family, |
105 | __be16 flags, __be64 tunnel_id, | |
106 | int md_size); | |
107 | ||
6a93cc90 AZ |
108 | static inline struct sk_buff *udp_tunnel_handle_offloads(struct sk_buff *skb, |
109 | bool udp_csum) | |
110 | { | |
111 | int type = udp_csum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; | |
112 | ||
6fa79666 | 113 | return iptunnel_handle_offloads(skb, type); |
6a93cc90 AZ |
114 | } |
115 | ||
cfdf1e1b JG |
116 | static inline void udp_tunnel_gro_complete(struct sk_buff *skb, int nhoff) |
117 | { | |
118 | struct udphdr *uh; | |
119 | ||
120 | uh = (struct udphdr *)(skb->data + nhoff - sizeof(struct udphdr)); | |
121 | skb_shinfo(skb)->gso_type |= uh->check ? | |
122 | SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; | |
123 | } | |
124 | ||
6a93cc90 AZ |
125 | static inline void udp_tunnel_encap_enable(struct socket *sock) |
126 | { | |
127 | #if IS_ENABLED(CONFIG_IPV6) | |
128 | if (sock->sk->sk_family == PF_INET6) | |
129 | ipv6_stub->udpv6_encap_enable(); | |
130 | else | |
131 | #endif | |
132 | udp_encap_enable(); | |
133 | } | |
134 | ||
8024e028 | 135 | #endif |