| #ifndef __NET_UDP_TUNNEL_H |
| #define __NET_UDP_TUNNEL_H |
| |
| #include <net/ip_tunnels.h> |
| #include <net/udp.h> |
| |
| #if IS_ENABLED(CONFIG_IPV6) |
| #include <net/ipv6.h> |
| #include <net/addrconf.h> |
| #endif |
| |
| struct udp_port_cfg { |
| u8 family; |
| |
| /* Used only for kernel-created sockets */ |
| union { |
| struct in_addr local_ip; |
| #if IS_ENABLED(CONFIG_IPV6) |
| struct in6_addr local_ip6; |
| #endif |
| }; |
| |
| union { |
| struct in_addr peer_ip; |
| #if IS_ENABLED(CONFIG_IPV6) |
| struct in6_addr peer_ip6; |
| #endif |
| }; |
| |
| __be16 local_udp_port; |
| __be16 peer_udp_port; |
| unsigned int use_udp_checksums:1, |
| use_udp6_tx_checksums:1, |
| use_udp6_rx_checksums:1, |
| ipv6_v6only:1; |
| }; |
| |
| int udp_sock_create4(struct net *net, struct udp_port_cfg *cfg, |
| struct socket **sockp); |
| |
| #if IS_ENABLED(CONFIG_IPV6) |
| int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg, |
| struct socket **sockp); |
| #else |
| static inline int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg, |
| struct socket **sockp) |
| { |
| return 0; |
| } |
| #endif |
| |
| static inline int udp_sock_create(struct net *net, |
| struct udp_port_cfg *cfg, |
| struct socket **sockp) |
| { |
| if (cfg->family == AF_INET) |
| return udp_sock_create4(net, cfg, sockp); |
| |
| if (cfg->family == AF_INET6) |
| return udp_sock_create6(net, cfg, sockp); |
| |
| return -EPFNOSUPPORT; |
| } |
| |
| typedef int (*udp_tunnel_encap_rcv_t)(struct sock *sk, struct sk_buff *skb); |
| typedef void (*udp_tunnel_encap_destroy_t)(struct sock *sk); |
| typedef struct sk_buff **(*udp_tunnel_gro_receive_t)(struct sock *sk, |
| struct sk_buff **head, |
| struct sk_buff *skb); |
| typedef int (*udp_tunnel_gro_complete_t)(struct sock *sk, struct sk_buff *skb, |
| int nhoff); |
| |
| struct udp_tunnel_sock_cfg { |
| void *sk_user_data; /* user data used by encap_rcv call back */ |
| /* Used for setting up udp_sock fields, see udp.h for details */ |
| __u8 encap_type; |
| udp_tunnel_encap_rcv_t encap_rcv; |
| udp_tunnel_encap_destroy_t encap_destroy; |
| udp_tunnel_gro_receive_t gro_receive; |
| udp_tunnel_gro_complete_t gro_complete; |
| }; |
| |
| /* Setup the given (UDP) sock to receive UDP encapsulated packets */ |
| void setup_udp_tunnel_sock(struct net *net, struct socket *sock, |
| struct udp_tunnel_sock_cfg *sock_cfg); |
| |
| /* Transmit the skb using UDP encapsulation. */ |
| void udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb, |
| __be32 src, __be32 dst, __u8 tos, __u8 ttl, |
| __be16 df, __be16 src_port, __be16 dst_port, |
| bool xnet, bool nocheck); |
| |
| #if IS_ENABLED(CONFIG_IPV6) |
| int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk, |
| struct sk_buff *skb, |
| struct net_device *dev, struct in6_addr *saddr, |
| struct in6_addr *daddr, |
| __u8 prio, __u8 ttl, __be32 label, |
| __be16 src_port, __be16 dst_port, bool nocheck); |
| #endif |
| |
| void udp_tunnel_sock_release(struct socket *sock); |
| |
| struct metadata_dst *udp_tun_rx_dst(struct sk_buff *skb, unsigned short family, |
| __be16 flags, __be64 tunnel_id, |
| int md_size); |
| |
| static inline int udp_tunnel_handle_offloads(struct sk_buff *skb, bool udp_csum) |
| { |
| int type = udp_csum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; |
| |
| return iptunnel_handle_offloads(skb, type); |
| } |
| |
| static inline void udp_tunnel_gro_complete(struct sk_buff *skb, int nhoff) |
| { |
| struct udphdr *uh; |
| |
| uh = (struct udphdr *)(skb->data + nhoff - sizeof(struct udphdr)); |
| skb_shinfo(skb)->gso_type |= uh->check ? |
| SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; |
| } |
| |
| static inline void udp_tunnel_encap_enable(struct socket *sock) |
| { |
| #if IS_ENABLED(CONFIG_IPV6) |
| if (sock->sk->sk_family == PF_INET6) |
| ipv6_stub->udpv6_encap_enable(); |
| else |
| #endif |
| udp_encap_enable(); |
| } |
| |
| #endif |