1 #ifndef __NET_UDP_TUNNEL_H
2 #define __NET_UDP_TUNNEL_H
4 #include <net/ip_tunnels.h>
7 #if IS_ENABLED(CONFIG_IPV6)
9 #include <net/addrconf.h>
15 /* Used only for kernel-created sockets */
17 struct in_addr local_ip;
18 #if IS_ENABLED(CONFIG_IPV6)
19 struct in6_addr local_ip6;
24 struct in_addr peer_ip;
25 #if IS_ENABLED(CONFIG_IPV6)
26 struct in6_addr peer_ip6;
30 __be16 local_udp_port;
32 unsigned int use_udp_checksums:1,
33 use_udp6_tx_checksums:1,
34 use_udp6_rx_checksums:1,
38 int udp_sock_create4(struct net *net, struct udp_port_cfg *cfg,
39 struct socket **sockp);
41 #if IS_ENABLED(CONFIG_IPV6)
42 int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg,
43 struct socket **sockp);
45 static inline int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg,
46 struct socket **sockp)
52 static inline int udp_sock_create(struct net *net,
53 struct udp_port_cfg *cfg,
54 struct socket **sockp)
56 if (cfg->family == AF_INET)
57 return udp_sock_create4(net, cfg, sockp);
59 if (cfg->family == AF_INET6)
60 return udp_sock_create6(net, cfg, sockp);
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);
67 typedef struct sk_buff **(*udp_tunnel_gro_receive_t)(struct sock *sk,
68 struct sk_buff **head,
70 typedef int (*udp_tunnel_gro_complete_t)(struct sock *sk, struct sk_buff *skb,
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 */
77 udp_tunnel_encap_rcv_t encap_rcv;
78 udp_tunnel_encap_destroy_t encap_destroy;
79 udp_tunnel_gro_receive_t gro_receive;
80 udp_tunnel_gro_complete_t gro_complete;
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);
87 /* -- List of parsable UDP tunnel types --
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.
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.
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.
103 enum udp_parsable_tunnel_type {
104 UDP_TUNNEL_TYPE_VXLAN, /* RFC 7348 */
105 UDP_TUNNEL_TYPE_GENEVE, /* draft-ietf-nvo3-geneve */
106 UDP_TUNNEL_TYPE_VXLAN_GPE, /* draft-ietf-nvo3-vxlan-gpe */
109 struct udp_tunnel_info {
111 sa_family_t sa_family;
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);
121 static inline void udp_tunnel_get_rx_info(struct net_device *dev)
124 call_netdevice_notifiers(NETDEV_UDP_TUNNEL_PUSH_INFO, dev);
127 /* Transmit the skb using UDP encapsulation. */
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);
133 #if IS_ENABLED(CONFIG_IPV6)
134 int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk,
136 struct net_device *dev, struct in6_addr *saddr,
137 struct in6_addr *daddr,
138 __u8 prio, __u8 ttl, __be32 label,
139 __be16 src_port, __be16 dst_port, bool nocheck);
142 void udp_tunnel_sock_release(struct socket *sock);
144 struct metadata_dst *udp_tun_rx_dst(struct sk_buff *skb, unsigned short family,
145 __be16 flags, __be64 tunnel_id,
149 static inline int udp_tunnel_handle_offloads(struct sk_buff *skb, bool udp_csum)
151 int type = udp_csum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
153 return iptunnel_handle_offloads(skb, type);
157 static inline void udp_tunnel_encap_enable(struct socket *sock)
159 #if IS_ENABLED(CONFIG_IPV6)
160 if (sock->sk->sk_family == PF_INET6)
161 ipv6_stub->udpv6_encap_enable();