projects / deliverable / linux.git / blame
| 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, | |
| 34 | use_udp6_rx_checksums:1; | |
| 35 | }; | |
| 36 | ||
| fd384412 AZ |
37 | int udp_sock_create4(struct net *net, struct udp_port_cfg *cfg, |
| 38 | struct socket **sockp); | |
| 39 | ||
| 40 | #if IS_ENABLED(CONFIG_IPV6) | |
| 41 | int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg, | |
| 42 | struct socket **sockp); | |
| 43 | #else | |
| 44 | static inline int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg, | |
| 45 | struct socket **sockp) | |
| 46 | { | |
| 47 | return 0; | |
| 48 | } | |
| 49 | #endif | |
| 50 | ||
| 51 | static inline int udp_sock_create(struct net *net, | |
| 52 | struct udp_port_cfg *cfg, | |
| 53 | struct socket **sockp) | |
| 54 | { | |
| 55 | if (cfg->family == AF_INET) | |
| 56 | return udp_sock_create4(net, cfg, sockp); | |
| 57 | ||
| 58 | if (cfg->family == AF_INET6) | |
| 59 | return udp_sock_create6(net, cfg, sockp); | |
| 60 | ||
| 61 | return -EPFNOSUPPORT; | |
| 62 | } | |
| 8024e028 | 63 | |
| 6a93cc90 AZ |
64 | typedef int (*udp_tunnel_encap_rcv_t)(struct sock *sk, struct sk_buff *skb); |
| 65 | typedef void (*udp_tunnel_encap_destroy_t)(struct sock *sk); | |
| 66 | ||
| 67 | struct udp_tunnel_sock_cfg { | |
| 68 | void *sk_user_data; /* user data used by encap_rcv call back */ | |
| 69 | /* Used for setting up udp_sock fields, see udp.h for details */ | |
| 70 | __u8 encap_type; | |
| 71 | udp_tunnel_encap_rcv_t encap_rcv; | |
| 72 | udp_tunnel_encap_destroy_t encap_destroy; | |
| 73 | }; | |
| 74 | ||
| 75 | /* Setup the given (UDP) sock to receive UDP encapsulated packets */ | |
| 76 | void setup_udp_tunnel_sock(struct net *net, struct socket *sock, | |
| 77 | struct udp_tunnel_sock_cfg *sock_cfg); | |
| 78 | ||
| 79 | /* Transmit the skb using UDP encapsulation. */ | |
| d998f8ef TH |
80 | int udp_tunnel_xmit_skb(struct rtable *rt, struct sk_buff *skb, |
| 81 | __be32 src, __be32 dst, __u8 tos, __u8 ttl, | |
| 82 | __be16 df, __be16 src_port, __be16 dst_port, | |
| 83 | bool xnet, bool nocheck); | |
| 6a93cc90 AZ |
84 | |
| 85 | #if IS_ENABLED(CONFIG_IPV6) | |
| d998f8ef TH |
86 | int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sk_buff *skb, |
| 87 | struct net_device *dev, struct in6_addr *saddr, | |
| 88 | struct in6_addr *daddr, | |
| 6a93cc90 | 89 | __u8 prio, __u8 ttl, __be16 src_port, |
| d998f8ef | 90 | __be16 dst_port, bool nocheck); |
| 6a93cc90 AZ |
91 | #endif |
| 92 | ||
| 93 | void udp_tunnel_sock_release(struct socket *sock); | |
| 94 | ||
| 95 | static inline struct sk_buff *udp_tunnel_handle_offloads(struct sk_buff *skb, | |
| 96 | bool udp_csum) | |
| 97 | { | |
| 98 | int type = udp_csum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; | |
| 99 | ||
| 100 | return iptunnel_handle_offloads(skb, udp_csum, type); | |
| 101 | } | |
| 102 | ||
| cfdf1e1b JG |
103 | static inline void udp_tunnel_gro_complete(struct sk_buff *skb, int nhoff) |
| 104 | { | |
| 105 | struct udphdr *uh; | |
| 106 | ||
| 107 | uh = (struct udphdr *)(skb->data + nhoff - sizeof(struct udphdr)); | |
| 108 | skb_shinfo(skb)->gso_type |= uh->check ? | |
| 109 | SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; | |
| 110 | } | |
| 111 | ||
| 6a93cc90 AZ |
112 | static inline void udp_tunnel_encap_enable(struct socket *sock) |
| 113 | { | |
| 114 | #if IS_ENABLED(CONFIG_IPV6) | |
| 115 | if (sock->sk->sk_family == PF_INET6) | |
| 116 | ipv6_stub->udpv6_encap_enable(); | |
| 117 | else | |
| 118 | #endif | |
| 119 | udp_encap_enable(); | |
| 120 | } | |
| 121 | ||
| 8024e028 | 122 | #endif |