[deliverable/linux.git] / include / net / udp_tunnel.h

#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);

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. */
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 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, 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
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,
a43a9ef6 JB	34	use_udp6_rx_checksums:1,
a43a9ef6 JB	35	ipv6_v6only:1;
8024e028 TH	36	};
8024e028 TH	37
fd384412 AZ	38	int udp_sock_create4(struct net net, struct udp_port_cfg cfg,
	39	struct socket **sockp);
	40
	41	#if IS_ENABLED(CONFIG_IPV6)
	42	int udp_sock_create6(struct net net, struct udp_port_cfg cfg,
	43	struct socket **sockp);
	44	#else
	45	static inline int udp_sock_create6(struct net net, struct udp_port_cfg cfg,
	46	struct socket **sockp)
	47	{
	48	return 0;
	49	}
	50	#endif
	51
	52	static inline int udp_sock_create(struct net *net,
	53	struct udp_port_cfg *cfg,
	54	struct socket **sockp)
	55	{
	56	if (cfg->family == AF_INET)
	57	return udp_sock_create4(net, cfg, sockp);
	58
	59	if (cfg->family == AF_INET6)
	60	return udp_sock_create6(net, cfg, sockp);
	61
	62	return -EPFNOSUPPORT;
	63	}
8024e028	64
6a93cc90 AZ	65	typedef int (udp_tunnel_encap_rcv_t)(struct sock sk, struct sk_buff *skb);
	66	typedef void (udp_tunnel_encap_destroy_t)(struct sock sk);
	67
	68	struct udp_tunnel_sock_cfg {
	69	void sk_user_data; / user data used by encap_rcv call back */
	70	/* Used for setting up udp_sock fields, see udp.h for details */
	71	__u8 encap_type;
	72	udp_tunnel_encap_rcv_t encap_rcv;
	73	udp_tunnel_encap_destroy_t encap_destroy;
	74	};
	75
	76	/* Setup the given (UDP) sock to receive UDP encapsulated packets */
	77	void setup_udp_tunnel_sock(struct net net, struct socket sock,
	78	struct udp_tunnel_sock_cfg *sock_cfg);
	79
	80	/* Transmit the skb using UDP encapsulation. */
039f5062 PS	81	void udp_tunnel_xmit_skb(struct rtable rt, struct sock sk, struct sk_buff *skb,
	82	__be32 src, __be32 dst, __u8 tos, __u8 ttl,
	83	__be16 df, __be16 src_port, __be16 dst_port,
	84	bool xnet, bool nocheck);
6a93cc90 AZ	85
6a93cc90 AZ	86	#if IS_ENABLED(CONFIG_IPV6)
79b16aad DM	87	int udp_tunnel6_xmit_skb(struct dst_entry dst, struct sock sk,
79b16aad DM	88	struct sk_buff *skb,
d998f8ef TH	89	struct net_device dev, struct in6_addr saddr,
d998f8ef TH	90	struct in6_addr *daddr,
13461144 DB	91	__u8 prio, __u8 ttl, __be32 label,
13461144 DB	92	__be16 src_port, __be16 dst_port, bool nocheck);
6a93cc90 AZ	93	#endif
	94
	95	void udp_tunnel_sock_release(struct socket *sock);
	96
c29a70d2 PS	97	struct metadata_dst udp_tun_rx_dst(struct sk_buff skb, unsigned short family,
	98	__be16 flags, __be64 tunnel_id,
	99	int md_size);
	100
6a93cc90 AZ	101	static inline struct sk_buff udp_tunnel_handle_offloads(struct sk_buff skb,
	102	bool udp_csum)
	103	{
	104	int type = udp_csum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
	105
6fa79666	106	return iptunnel_handle_offloads(skb, type);
6a93cc90 AZ	107	}
6a93cc90 AZ	108
cfdf1e1b JG	109	static inline void udp_tunnel_gro_complete(struct sk_buff *skb, int nhoff)
	110	{
	111	struct udphdr *uh;
	112
	113	uh = (struct udphdr *)(skb->data + nhoff - sizeof(struct udphdr));
	114	skb_shinfo(skb)->gso_type \|= uh->check ?
	115	SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
	116	}
	117
6a93cc90 AZ	118	static inline void udp_tunnel_encap_enable(struct socket *sock)
	119	{
	120	#if IS_ENABLED(CONFIG_IPV6)
	121	if (sock->sk->sk_family == PF_INET6)
	122	ipv6_stub->udpv6_encap_enable();
	123	else
	124	#endif
	125	udp_encap_enable();
	126	}
	127
8024e028	128	#endif