187 строки
5.4 KiB
C
187 строки
5.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#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;
|
|
int bind_ifindex;
|
|
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 int (*udp_tunnel_encap_err_lookup_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 list_head *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_err_lookup_t encap_err_lookup;
|
|
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);
|
|
|
|
/* -- List of parsable UDP tunnel types --
|
|
*
|
|
* Adding to this list will result in serious debate. The main issue is
|
|
* that this list is essentially a list of workarounds for either poorly
|
|
* designed tunnels, or poorly designed device offloads.
|
|
*
|
|
* The parsing supported via these types should really be used for Rx
|
|
* traffic only as the network stack will have already inserted offsets for
|
|
* the location of the headers in the skb. In addition any ports that are
|
|
* pushed should be kept within the namespace without leaking to other
|
|
* devices such as VFs or other ports on the same device.
|
|
*
|
|
* It is strongly encouraged to use CHECKSUM_COMPLETE for Rx to avoid the
|
|
* need to use this for Rx checksum offload. It should not be necessary to
|
|
* call this function to perform Tx offloads on outgoing traffic.
|
|
*/
|
|
enum udp_parsable_tunnel_type {
|
|
UDP_TUNNEL_TYPE_VXLAN, /* RFC 7348 */
|
|
UDP_TUNNEL_TYPE_GENEVE, /* draft-ietf-nvo3-geneve */
|
|
UDP_TUNNEL_TYPE_VXLAN_GPE, /* draft-ietf-nvo3-vxlan-gpe */
|
|
};
|
|
|
|
struct udp_tunnel_info {
|
|
unsigned short type;
|
|
sa_family_t sa_family;
|
|
__be16 port;
|
|
};
|
|
|
|
/* Notify network devices of offloadable types */
|
|
void udp_tunnel_push_rx_port(struct net_device *dev, struct socket *sock,
|
|
unsigned short type);
|
|
void udp_tunnel_drop_rx_port(struct net_device *dev, struct socket *sock,
|
|
unsigned short type);
|
|
void udp_tunnel_notify_add_rx_port(struct socket *sock, unsigned short type);
|
|
void udp_tunnel_notify_del_rx_port(struct socket *sock, unsigned short type);
|
|
|
|
static inline void udp_tunnel_get_rx_info(struct net_device *dev)
|
|
{
|
|
ASSERT_RTNL();
|
|
call_netdevice_notifiers(NETDEV_UDP_TUNNEL_PUSH_INFO, dev);
|
|
}
|
|
|
|
static inline void udp_tunnel_drop_rx_info(struct net_device *dev)
|
|
{
|
|
ASSERT_RTNL();
|
|
call_netdevice_notifiers(NETDEV_UDP_TUNNEL_DROP_INFO, dev);
|
|
}
|
|
|
|
/* 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);
|
|
|
|
#ifdef CONFIG_INET
|
|
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);
|
|
}
|
|
#endif
|
|
|
|
static inline void udp_tunnel_encap_enable(struct socket *sock)
|
|
{
|
|
struct udp_sock *up = udp_sk(sock->sk);
|
|
|
|
if (up->encap_enabled)
|
|
return;
|
|
|
|
up->encap_enabled = 1;
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
if (sock->sk->sk_family == PF_INET6)
|
|
ipv6_stub->udpv6_encap_enable();
|
|
else
|
|
#endif
|
|
udp_encap_enable();
|
|
}
|
|
|
|
#endif
|