Commit | Line | Data |
---|---|---|
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 | ||
e7b3db5e AD |
87 | /* -- List of parsable UDP tunnel types -- |
88 | * | |
89 | * Adding to this list will result in serious debate. The main issue is | |
90 | * that this list is essentially a list of workarounds for either poorly | |
91 | * designed tunnels, or poorly designed device offloads. | |
92 | * | |
93 | * The parsing supported via these types should really be used for Rx | |
94 | * traffic only as the network stack will have already inserted offsets for | |
95 | * the location of the headers in the skb. In addition any ports that are | |
96 | * pushed should be kept within the namespace without leaking to other | |
97 | * devices such as VFs or other ports on the same device. | |
98 | * | |
99 | * It is strongly encouraged to use CHECKSUM_COMPLETE for Rx to avoid the | |
100 | * need to use this for Rx checksum offload. It should not be necessary to | |
101 | * call this function to perform Tx offloads on outgoing traffic. | |
102 | */ | |
103 | enum udp_parsable_tunnel_type { | |
104 | UDP_TUNNEL_TYPE_VXLAN, /* RFC 7348 */ | |
105 | UDP_TUNNEL_TYPE_GENEVE, /* draft-ietf-nvo3-geneve */ | |
b9adcd69 | 106 | UDP_TUNNEL_TYPE_VXLAN_GPE, /* draft-ietf-nvo3-vxlan-gpe */ |
e7b3db5e AD |
107 | }; |
108 | ||
109 | struct udp_tunnel_info { | |
110 | unsigned short type; | |
111 | sa_family_t sa_family; | |
112 | __be16 port; | |
113 | }; | |
114 | ||
115 | /* Notify network devices of offloadable types */ | |
116 | void udp_tunnel_push_rx_port(struct net_device *dev, struct socket *sock, | |
117 | unsigned short type); | |
118 | void udp_tunnel_notify_add_rx_port(struct socket *sock, unsigned short type); | |
119 | void udp_tunnel_notify_del_rx_port(struct socket *sock, unsigned short type); | |
120 | ||
7c46a640 AD |
121 | static inline void udp_tunnel_get_rx_info(struct net_device *dev) |
122 | { | |
123 | ASSERT_RTNL(); | |
124 | call_netdevice_notifiers(NETDEV_UDP_TUNNEL_PUSH_INFO, dev); | |
125 | } | |
126 | ||
6a93cc90 | 127 | /* Transmit the skb using UDP encapsulation. */ |
039f5062 PS |
128 | void udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb, |
129 | __be32 src, __be32 dst, __u8 tos, __u8 ttl, | |
130 | __be16 df, __be16 src_port, __be16 dst_port, | |
131 | bool xnet, bool nocheck); | |
6a93cc90 AZ |
132 | |
133 | #if IS_ENABLED(CONFIG_IPV6) | |
79b16aad DM |
134 | int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk, |
135 | struct sk_buff *skb, | |
d998f8ef TH |
136 | struct net_device *dev, struct in6_addr *saddr, |
137 | struct in6_addr *daddr, | |
13461144 DB |
138 | __u8 prio, __u8 ttl, __be32 label, |
139 | __be16 src_port, __be16 dst_port, bool nocheck); | |
6a93cc90 AZ |
140 | #endif |
141 | ||
142 | void udp_tunnel_sock_release(struct socket *sock); | |
143 | ||
c29a70d2 PS |
144 | struct metadata_dst *udp_tun_rx_dst(struct sk_buff *skb, unsigned short family, |
145 | __be16 flags, __be64 tunnel_id, | |
146 | int md_size); | |
147 | ||
86a98057 | 148 | #ifdef CONFIG_INET |
aed069df | 149 | static inline int udp_tunnel_handle_offloads(struct sk_buff *skb, bool udp_csum) |
6a93cc90 AZ |
150 | { |
151 | int type = udp_csum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; | |
152 | ||
6fa79666 | 153 | return iptunnel_handle_offloads(skb, type); |
6a93cc90 | 154 | } |
86a98057 | 155 | #endif |
6a93cc90 AZ |
156 | |
157 | static inline void udp_tunnel_encap_enable(struct socket *sock) | |
158 | { | |
159 | #if IS_ENABLED(CONFIG_IPV6) | |
160 | if (sock->sk->sk_family == PF_INET6) | |
161 | ipv6_stub->udpv6_encap_enable(); | |
162 | else | |
163 | #endif | |
164 | udp_encap_enable(); | |
165 | } | |
166 | ||
8024e028 | 167 | #endif |