Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
8024e028 TH |
2 | #ifndef __NET_UDP_TUNNEL_H |
3 | #define __NET_UDP_TUNNEL_H | |
4 | ||
6a93cc90 AZ |
5 | #include <net/ip_tunnels.h> |
6 | #include <net/udp.h> | |
7 | ||
8 | #if IS_ENABLED(CONFIG_IPV6) | |
9 | #include <net/ipv6.h> | |
10 | #include <net/addrconf.h> | |
11 | #endif | |
12 | ||
8024e028 TH |
13 | struct udp_port_cfg { |
14 | u8 family; | |
15 | ||
16 | /* Used only for kernel-created sockets */ | |
17 | union { | |
18 | struct in_addr local_ip; | |
19 | #if IS_ENABLED(CONFIG_IPV6) | |
20 | struct in6_addr local_ip6; | |
21 | #endif | |
22 | }; | |
23 | ||
24 | union { | |
25 | struct in_addr peer_ip; | |
26 | #if IS_ENABLED(CONFIG_IPV6) | |
27 | struct in6_addr peer_ip6; | |
28 | #endif | |
29 | }; | |
30 | ||
31 | __be16 local_udp_port; | |
32 | __be16 peer_udp_port; | |
33 | unsigned int use_udp_checksums:1, | |
34 | use_udp6_tx_checksums:1, | |
a43a9ef6 JB |
35 | use_udp6_rx_checksums:1, |
36 | ipv6_v6only:1; | |
8024e028 TH |
37 | }; |
38 | ||
fd384412 AZ |
39 | int udp_sock_create4(struct net *net, struct udp_port_cfg *cfg, |
40 | struct socket **sockp); | |
41 | ||
42 | #if IS_ENABLED(CONFIG_IPV6) | |
43 | int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg, | |
44 | struct socket **sockp); | |
45 | #else | |
46 | static inline int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg, | |
47 | struct socket **sockp) | |
48 | { | |
49 | return 0; | |
50 | } | |
51 | #endif | |
52 | ||
53 | static inline int udp_sock_create(struct net *net, | |
54 | struct udp_port_cfg *cfg, | |
55 | struct socket **sockp) | |
56 | { | |
57 | if (cfg->family == AF_INET) | |
58 | return udp_sock_create4(net, cfg, sockp); | |
59 | ||
60 | if (cfg->family == AF_INET6) | |
61 | return udp_sock_create6(net, cfg, sockp); | |
62 | ||
63 | return -EPFNOSUPPORT; | |
64 | } | |
8024e028 | 65 | |
6a93cc90 AZ |
66 | typedef int (*udp_tunnel_encap_rcv_t)(struct sock *sk, struct sk_buff *skb); |
67 | typedef void (*udp_tunnel_encap_destroy_t)(struct sock *sk); | |
38fd2af2 TH |
68 | typedef struct sk_buff **(*udp_tunnel_gro_receive_t)(struct sock *sk, |
69 | struct sk_buff **head, | |
70 | struct sk_buff *skb); | |
71 | typedef int (*udp_tunnel_gro_complete_t)(struct sock *sk, struct sk_buff *skb, | |
72 | int nhoff); | |
6a93cc90 AZ |
73 | |
74 | struct udp_tunnel_sock_cfg { | |
75 | void *sk_user_data; /* user data used by encap_rcv call back */ | |
76 | /* Used for setting up udp_sock fields, see udp.h for details */ | |
77 | __u8 encap_type; | |
78 | udp_tunnel_encap_rcv_t encap_rcv; | |
79 | udp_tunnel_encap_destroy_t encap_destroy; | |
38fd2af2 TH |
80 | udp_tunnel_gro_receive_t gro_receive; |
81 | udp_tunnel_gro_complete_t gro_complete; | |
6a93cc90 AZ |
82 | }; |
83 | ||
84 | /* Setup the given (UDP) sock to receive UDP encapsulated packets */ | |
85 | void setup_udp_tunnel_sock(struct net *net, struct socket *sock, | |
86 | struct udp_tunnel_sock_cfg *sock_cfg); | |
87 | ||
e7b3db5e AD |
88 | /* -- List of parsable UDP tunnel types -- |
89 | * | |
90 | * Adding to this list will result in serious debate. The main issue is | |
91 | * that this list is essentially a list of workarounds for either poorly | |
92 | * designed tunnels, or poorly designed device offloads. | |
93 | * | |
94 | * The parsing supported via these types should really be used for Rx | |
95 | * traffic only as the network stack will have already inserted offsets for | |
96 | * the location of the headers in the skb. In addition any ports that are | |
97 | * pushed should be kept within the namespace without leaking to other | |
98 | * devices such as VFs or other ports on the same device. | |
99 | * | |
100 | * It is strongly encouraged to use CHECKSUM_COMPLETE for Rx to avoid the | |
101 | * need to use this for Rx checksum offload. It should not be necessary to | |
102 | * call this function to perform Tx offloads on outgoing traffic. | |
103 | */ | |
104 | enum udp_parsable_tunnel_type { | |
105 | UDP_TUNNEL_TYPE_VXLAN, /* RFC 7348 */ | |
106 | UDP_TUNNEL_TYPE_GENEVE, /* draft-ietf-nvo3-geneve */ | |
b9adcd69 | 107 | UDP_TUNNEL_TYPE_VXLAN_GPE, /* draft-ietf-nvo3-vxlan-gpe */ |
e7b3db5e AD |
108 | }; |
109 | ||
110 | struct udp_tunnel_info { | |
111 | unsigned short type; | |
112 | sa_family_t sa_family; | |
113 | __be16 port; | |
114 | }; | |
115 | ||
116 | /* Notify network devices of offloadable types */ | |
117 | void udp_tunnel_push_rx_port(struct net_device *dev, struct socket *sock, | |
118 | unsigned short type); | |
296d8ee3 SD |
119 | void udp_tunnel_drop_rx_port(struct net_device *dev, struct socket *sock, |
120 | unsigned short type); | |
e7b3db5e AD |
121 | void udp_tunnel_notify_add_rx_port(struct socket *sock, unsigned short type); |
122 | void udp_tunnel_notify_del_rx_port(struct socket *sock, unsigned short type); | |
123 | ||
7c46a640 AD |
124 | static inline void udp_tunnel_get_rx_info(struct net_device *dev) |
125 | { | |
126 | ASSERT_RTNL(); | |
127 | call_netdevice_notifiers(NETDEV_UDP_TUNNEL_PUSH_INFO, dev); | |
128 | } | |
129 | ||
296d8ee3 SD |
130 | static inline void udp_tunnel_drop_rx_info(struct net_device *dev) |
131 | { | |
132 | ASSERT_RTNL(); | |
133 | call_netdevice_notifiers(NETDEV_UDP_TUNNEL_DROP_INFO, dev); | |
134 | } | |
135 | ||
6a93cc90 | 136 | /* Transmit the skb using UDP encapsulation. */ |
039f5062 PS |
137 | void udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb, |
138 | __be32 src, __be32 dst, __u8 tos, __u8 ttl, | |
139 | __be16 df, __be16 src_port, __be16 dst_port, | |
140 | bool xnet, bool nocheck); | |
6a93cc90 AZ |
141 | |
142 | #if IS_ENABLED(CONFIG_IPV6) | |
79b16aad DM |
143 | int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk, |
144 | struct sk_buff *skb, | |
d998f8ef TH |
145 | struct net_device *dev, struct in6_addr *saddr, |
146 | struct in6_addr *daddr, | |
13461144 DB |
147 | __u8 prio, __u8 ttl, __be32 label, |
148 | __be16 src_port, __be16 dst_port, bool nocheck); | |
6a93cc90 AZ |
149 | #endif |
150 | ||
151 | void udp_tunnel_sock_release(struct socket *sock); | |
152 | ||
c29a70d2 PS |
153 | struct metadata_dst *udp_tun_rx_dst(struct sk_buff *skb, unsigned short family, |
154 | __be16 flags, __be64 tunnel_id, | |
155 | int md_size); | |
156 | ||
86a98057 | 157 | #ifdef CONFIG_INET |
aed069df | 158 | static inline int udp_tunnel_handle_offloads(struct sk_buff *skb, bool udp_csum) |
6a93cc90 AZ |
159 | { |
160 | int type = udp_csum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; | |
161 | ||
6fa79666 | 162 | return iptunnel_handle_offloads(skb, type); |
6a93cc90 | 163 | } |
86a98057 | 164 | #endif |
6a93cc90 AZ |
165 | |
166 | static inline void udp_tunnel_encap_enable(struct socket *sock) | |
167 | { | |
168 | #if IS_ENABLED(CONFIG_IPV6) | |
169 | if (sock->sk->sk_family == PF_INET6) | |
170 | ipv6_stub->udpv6_encap_enable(); | |
171 | else | |
172 | #endif | |
173 | udp_encap_enable(); | |
174 | } | |
175 | ||
8024e028 | 176 | #endif |