Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
Tom Herbert | 8024e02 | 2014-07-13 19:49:37 -0700 | [diff] [blame] | 2 | #ifndef __NET_UDP_TUNNEL_H |
| 3 | #define __NET_UDP_TUNNEL_H |
| 4 | |
Andy Zhou | 6a93cc9 | 2014-09-16 17:31:17 -0700 | [diff] [blame] | 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 | |
Tom Herbert | 8024e02 | 2014-07-13 19:49:37 -0700 | [diff] [blame] | 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; |
Alexis Bauvin | da5095d05 | 2018-12-03 10:54:38 +0100 | [diff] [blame] | 33 | int bind_ifindex; |
Tom Herbert | 8024e02 | 2014-07-13 19:49:37 -0700 | [diff] [blame] | 34 | unsigned int use_udp_checksums:1, |
| 35 | use_udp6_tx_checksums:1, |
Jiri Benc | a43a9ef | 2015-08-28 20:48:22 +0200 | [diff] [blame] | 36 | use_udp6_rx_checksums:1, |
| 37 | ipv6_v6only:1; |
Tom Herbert | 8024e02 | 2014-07-13 19:49:37 -0700 | [diff] [blame] | 38 | }; |
| 39 | |
Andy Zhou | fd38441 | 2014-09-16 17:31:16 -0700 | [diff] [blame] | 40 | int udp_sock_create4(struct net *net, struct udp_port_cfg *cfg, |
| 41 | struct socket **sockp); |
| 42 | |
| 43 | #if IS_ENABLED(CONFIG_IPV6) |
| 44 | int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg, |
| 45 | struct socket **sockp); |
| 46 | #else |
| 47 | static inline int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg, |
| 48 | struct socket **sockp) |
| 49 | { |
| 50 | return 0; |
| 51 | } |
| 52 | #endif |
| 53 | |
| 54 | static inline int udp_sock_create(struct net *net, |
| 55 | struct udp_port_cfg *cfg, |
| 56 | struct socket **sockp) |
| 57 | { |
| 58 | if (cfg->family == AF_INET) |
| 59 | return udp_sock_create4(net, cfg, sockp); |
| 60 | |
| 61 | if (cfg->family == AF_INET6) |
| 62 | return udp_sock_create6(net, cfg, sockp); |
| 63 | |
| 64 | return -EPFNOSUPPORT; |
| 65 | } |
Tom Herbert | 8024e02 | 2014-07-13 19:49:37 -0700 | [diff] [blame] | 66 | |
Andy Zhou | 6a93cc9 | 2014-09-16 17:31:17 -0700 | [diff] [blame] | 67 | typedef int (*udp_tunnel_encap_rcv_t)(struct sock *sk, struct sk_buff *skb); |
Stefano Brivio | a36e185 | 2018-11-08 12:19:14 +0100 | [diff] [blame] | 68 | typedef int (*udp_tunnel_encap_err_lookup_t)(struct sock *sk, |
| 69 | struct sk_buff *skb); |
Andy Zhou | 6a93cc9 | 2014-09-16 17:31:17 -0700 | [diff] [blame] | 70 | typedef void (*udp_tunnel_encap_destroy_t)(struct sock *sk); |
David Miller | d4546c2 | 2018-06-24 14:13:49 +0900 | [diff] [blame] | 71 | typedef struct sk_buff *(*udp_tunnel_gro_receive_t)(struct sock *sk, |
| 72 | struct list_head *head, |
| 73 | struct sk_buff *skb); |
Tom Herbert | 38fd2af | 2016-04-05 08:22:52 -0700 | [diff] [blame] | 74 | typedef int (*udp_tunnel_gro_complete_t)(struct sock *sk, struct sk_buff *skb, |
| 75 | int nhoff); |
Andy Zhou | 6a93cc9 | 2014-09-16 17:31:17 -0700 | [diff] [blame] | 76 | |
| 77 | struct udp_tunnel_sock_cfg { |
| 78 | void *sk_user_data; /* user data used by encap_rcv call back */ |
| 79 | /* Used for setting up udp_sock fields, see udp.h for details */ |
| 80 | __u8 encap_type; |
| 81 | udp_tunnel_encap_rcv_t encap_rcv; |
Stefano Brivio | a36e185 | 2018-11-08 12:19:14 +0100 | [diff] [blame] | 82 | udp_tunnel_encap_err_lookup_t encap_err_lookup; |
Andy Zhou | 6a93cc9 | 2014-09-16 17:31:17 -0700 | [diff] [blame] | 83 | udp_tunnel_encap_destroy_t encap_destroy; |
Tom Herbert | 38fd2af | 2016-04-05 08:22:52 -0700 | [diff] [blame] | 84 | udp_tunnel_gro_receive_t gro_receive; |
| 85 | udp_tunnel_gro_complete_t gro_complete; |
Andy Zhou | 6a93cc9 | 2014-09-16 17:31:17 -0700 | [diff] [blame] | 86 | }; |
| 87 | |
| 88 | /* Setup the given (UDP) sock to receive UDP encapsulated packets */ |
| 89 | void setup_udp_tunnel_sock(struct net *net, struct socket *sock, |
| 90 | struct udp_tunnel_sock_cfg *sock_cfg); |
| 91 | |
Alexander Duyck | e7b3db5 | 2016-06-16 12:20:52 -0700 | [diff] [blame] | 92 | /* -- List of parsable UDP tunnel types -- |
| 93 | * |
| 94 | * Adding to this list will result in serious debate. The main issue is |
| 95 | * that this list is essentially a list of workarounds for either poorly |
| 96 | * designed tunnels, or poorly designed device offloads. |
| 97 | * |
| 98 | * The parsing supported via these types should really be used for Rx |
| 99 | * traffic only as the network stack will have already inserted offsets for |
| 100 | * the location of the headers in the skb. In addition any ports that are |
| 101 | * pushed should be kept within the namespace without leaking to other |
| 102 | * devices such as VFs or other ports on the same device. |
| 103 | * |
| 104 | * It is strongly encouraged to use CHECKSUM_COMPLETE for Rx to avoid the |
| 105 | * need to use this for Rx checksum offload. It should not be necessary to |
| 106 | * call this function to perform Tx offloads on outgoing traffic. |
| 107 | */ |
| 108 | enum udp_parsable_tunnel_type { |
| 109 | UDP_TUNNEL_TYPE_VXLAN, /* RFC 7348 */ |
| 110 | UDP_TUNNEL_TYPE_GENEVE, /* draft-ietf-nvo3-geneve */ |
Alexander Duyck | b9adcd69 | 2016-06-16 12:23:19 -0700 | [diff] [blame] | 111 | UDP_TUNNEL_TYPE_VXLAN_GPE, /* draft-ietf-nvo3-vxlan-gpe */ |
Alexander Duyck | e7b3db5 | 2016-06-16 12:20:52 -0700 | [diff] [blame] | 112 | }; |
| 113 | |
| 114 | struct udp_tunnel_info { |
| 115 | unsigned short type; |
| 116 | sa_family_t sa_family; |
| 117 | __be16 port; |
| 118 | }; |
| 119 | |
| 120 | /* Notify network devices of offloadable types */ |
| 121 | void udp_tunnel_push_rx_port(struct net_device *dev, struct socket *sock, |
| 122 | unsigned short type); |
Sabrina Dubroca | 296d8ee | 2017-07-21 12:49:30 +0200 | [diff] [blame] | 123 | void udp_tunnel_drop_rx_port(struct net_device *dev, struct socket *sock, |
| 124 | unsigned short type); |
Alexander Duyck | e7b3db5 | 2016-06-16 12:20:52 -0700 | [diff] [blame] | 125 | void udp_tunnel_notify_add_rx_port(struct socket *sock, unsigned short type); |
| 126 | void udp_tunnel_notify_del_rx_port(struct socket *sock, unsigned short type); |
| 127 | |
Alexander Duyck | 7c46a64 | 2016-06-16 12:21:00 -0700 | [diff] [blame] | 128 | static inline void udp_tunnel_get_rx_info(struct net_device *dev) |
| 129 | { |
| 130 | ASSERT_RTNL(); |
| 131 | call_netdevice_notifiers(NETDEV_UDP_TUNNEL_PUSH_INFO, dev); |
| 132 | } |
| 133 | |
Sabrina Dubroca | 296d8ee | 2017-07-21 12:49:30 +0200 | [diff] [blame] | 134 | static inline void udp_tunnel_drop_rx_info(struct net_device *dev) |
| 135 | { |
| 136 | ASSERT_RTNL(); |
| 137 | call_netdevice_notifiers(NETDEV_UDP_TUNNEL_DROP_INFO, dev); |
| 138 | } |
| 139 | |
Andy Zhou | 6a93cc9 | 2014-09-16 17:31:17 -0700 | [diff] [blame] | 140 | /* Transmit the skb using UDP encapsulation. */ |
Pravin B Shelar | 039f506 | 2015-12-24 14:34:54 -0800 | [diff] [blame] | 141 | void udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb, |
| 142 | __be32 src, __be32 dst, __u8 tos, __u8 ttl, |
| 143 | __be16 df, __be16 src_port, __be16 dst_port, |
| 144 | bool xnet, bool nocheck); |
Andy Zhou | 6a93cc9 | 2014-09-16 17:31:17 -0700 | [diff] [blame] | 145 | |
| 146 | #if IS_ENABLED(CONFIG_IPV6) |
David Miller | 79b16aa | 2015-04-05 22:19:09 -0400 | [diff] [blame] | 147 | int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk, |
| 148 | struct sk_buff *skb, |
Tom Herbert | d998f8e | 2015-01-20 11:23:04 -0800 | [diff] [blame] | 149 | struct net_device *dev, struct in6_addr *saddr, |
| 150 | struct in6_addr *daddr, |
Daniel Borkmann | 1346114 | 2016-03-09 03:00:02 +0100 | [diff] [blame] | 151 | __u8 prio, __u8 ttl, __be32 label, |
| 152 | __be16 src_port, __be16 dst_port, bool nocheck); |
Andy Zhou | 6a93cc9 | 2014-09-16 17:31:17 -0700 | [diff] [blame] | 153 | #endif |
| 154 | |
| 155 | void udp_tunnel_sock_release(struct socket *sock); |
| 156 | |
Pravin B Shelar | c29a70d | 2015-08-26 23:46:50 -0700 | [diff] [blame] | 157 | struct metadata_dst *udp_tun_rx_dst(struct sk_buff *skb, unsigned short family, |
| 158 | __be16 flags, __be64 tunnel_id, |
| 159 | int md_size); |
| 160 | |
Alexander Duyck | 86a9805 | 2016-06-16 12:20:44 -0700 | [diff] [blame] | 161 | #ifdef CONFIG_INET |
Alexander Duyck | aed069d | 2016-04-14 15:33:37 -0400 | [diff] [blame] | 162 | static inline int udp_tunnel_handle_offloads(struct sk_buff *skb, bool udp_csum) |
Andy Zhou | 6a93cc9 | 2014-09-16 17:31:17 -0700 | [diff] [blame] | 163 | { |
| 164 | int type = udp_csum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL; |
| 165 | |
Edward Cree | 6fa7966 | 2016-02-11 21:02:31 +0000 | [diff] [blame] | 166 | return iptunnel_handle_offloads(skb, type); |
Andy Zhou | 6a93cc9 | 2014-09-16 17:31:17 -0700 | [diff] [blame] | 167 | } |
Alexander Duyck | 86a9805 | 2016-06-16 12:20:44 -0700 | [diff] [blame] | 168 | #endif |
Andy Zhou | 6a93cc9 | 2014-09-16 17:31:17 -0700 | [diff] [blame] | 169 | |
| 170 | static inline void udp_tunnel_encap_enable(struct socket *sock) |
| 171 | { |
Paolo Abeni | 60fb956 | 2018-11-07 12:38:28 +0100 | [diff] [blame] | 172 | struct udp_sock *up = udp_sk(sock->sk); |
| 173 | |
| 174 | if (up->encap_enabled) |
| 175 | return; |
| 176 | |
| 177 | up->encap_enabled = 1; |
Andy Zhou | 6a93cc9 | 2014-09-16 17:31:17 -0700 | [diff] [blame] | 178 | #if IS_ENABLED(CONFIG_IPV6) |
| 179 | if (sock->sk->sk_family == PF_INET6) |
| 180 | ipv6_stub->udpv6_encap_enable(); |
| 181 | else |
| 182 | #endif |
| 183 | udp_encap_enable(); |
| 184 | } |
| 185 | |
Tom Herbert | 8024e02 | 2014-07-13 19:49:37 -0700 | [diff] [blame] | 186 | #endif |