6a93cc9052
Added a few more UDP tunnel APIs that can be shared by UDP based tunnel protocol implementation. The main ones are highlighted below. setup_udp_tunnel_sock() configures UDP listener socket for receiving UDP encapsulated packets. udp_tunnel_xmit_skb() and upd_tunnel6_xmit_skb() transmit skb using UDP encapsulation. udp_tunnel_sock_release() closes the UDP tunnel listener socket. Signed-off-by: Andy Zhou <azhou@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net>
113 lines
2.8 KiB
C
113 lines
2.8 KiB
C
#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;
|
|
};
|
|
|
|
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);
|
|
|
|
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;
|
|
};
|
|
|
|
/* 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. */
|
|
int udp_tunnel_xmit_skb(struct socket *sock, struct rtable *rt,
|
|
struct sk_buff *skb, __be32 src, __be32 dst,
|
|
__u8 tos, __u8 ttl, __be16 df, __be16 src_port,
|
|
__be16 dst_port, bool xnet);
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
int udp_tunnel6_xmit_skb(struct socket *sock, struct dst_entry *dst,
|
|
struct sk_buff *skb, struct net_device *dev,
|
|
struct in6_addr *saddr, struct in6_addr *daddr,
|
|
__u8 prio, __u8 ttl, __be16 src_port,
|
|
__be16 dst_port);
|
|
#endif
|
|
|
|
void udp_tunnel_sock_release(struct socket *sock);
|
|
|
|
static inline struct sk_buff *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, udp_csum, type);
|
|
}
|
|
|
|
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
|