[deliverable/linux.git] / include / net / ip6_tunnel.h

#ifndef _NET_IP6_TUNNEL_H
#define _NET_IP6_TUNNEL_H

#include <linux/ipv6.h>
#include <linux/netdevice.h>
#include <linux/if_tunnel.h>
#include <linux/ip6_tunnel.h>

#define IP6TUNNEL_ERR_TIMEO (30*HZ)

/* capable of sending packets */
#define IP6_TNL_F_CAP_XMIT 0x10000
/* capable of receiving packets */
#define IP6_TNL_F_CAP_RCV 0x20000
/* determine capability on a per-packet basis */
#define IP6_TNL_F_CAP_PER_PACKET 0x40000

struct __ip6_tnl_parm {
	char name[IFNAMSIZ];	/* name of tunnel device */
	int link;		/* ifindex of underlying L2 interface */
	__u8 proto;		/* tunnel protocol */
	__u8 encap_limit;	/* encapsulation limit for tunnel */
	__u8 hop_limit;		/* hop limit for tunnel */
	__be32 flowinfo;	/* traffic class and flowlabel for tunnel */
	__u32 flags;		/* tunnel flags */
	struct in6_addr laddr;	/* local tunnel end-point address */
	struct in6_addr raddr;	/* remote tunnel end-point address */

	__be16			i_flags;
	__be16			o_flags;
	__be32			i_key;
	__be32			o_key;
};

/* IPv6 tunnel */
struct ip6_tnl {
	struct ip6_tnl __rcu *next;	/* next tunnel in list */
	struct net_device *dev;	/* virtual device associated with tunnel */
	struct net *net;	/* netns for packet i/o */
	struct __ip6_tnl_parm parms;	/* tunnel configuration parameters */
	struct flowi fl;	/* flowi template for xmit */
	struct dst_entry *dst_cache;    /* cached dst */
	u32 dst_cookie;

	int err_count;
	unsigned long err_time;

	/* These fields used only by GRE */
	__u32 i_seqno;	/* The last seen seqno	*/
	__u32 o_seqno;	/* The last output seqno */
	int hlen;       /* Precalculated GRE header length */
	int mlink;
};

/* Tunnel encapsulation limit destination sub-option */

struct ipv6_tlv_tnl_enc_lim {
	__u8 type;		/* type-code for option         */
	__u8 length;		/* option length                */
	__u8 encap_limit;	/* tunnel encapsulation limit   */
} __packed;

struct dst_entry *ip6_tnl_dst_check(struct ip6_tnl *t);
void ip6_tnl_dst_reset(struct ip6_tnl *t);
void ip6_tnl_dst_store(struct ip6_tnl *t, struct dst_entry *dst);
int ip6_tnl_rcv_ctl(struct ip6_tnl *t, const struct in6_addr *laddr,
		const struct in6_addr *raddr);
int ip6_tnl_xmit_ctl(struct ip6_tnl *t, const struct in6_addr *laddr,
		     const struct in6_addr *raddr);
__u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw);
__u32 ip6_tnl_get_cap(struct ip6_tnl *t, const struct in6_addr *laddr,
			     const struct in6_addr *raddr);
struct net *ip6_tnl_get_link_net(const struct net_device *dev);

static inline void ip6tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct net_device_stats *stats = &dev->stats;
	int pkt_len, err;

	pkt_len = skb->len;
	err = ip6_local_out(skb);

	if (net_xmit_eval(err) == 0) {
		struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
		u64_stats_update_begin(&tstats->syncp);
		tstats->tx_bytes += pkt_len;
		tstats->tx_packets++;
		u64_stats_update_end(&tstats->syncp);
	} else {
		stats->tx_errors++;
		stats->tx_aborted_errors++;
	}
}
#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef _NET_IP6_TUNNEL_H
	2	#define _NET_IP6_TUNNEL_H
	3
	4	#include <linux/ipv6.h>
	5	#include <linux/netdevice.h>
c5441932	6	#include <linux/if_tunnel.h>
1da177e4 LT	7	#include <linux/ip6_tunnel.h>
1da177e4 LT	8
c12b395a	9	#define IP6TUNNEL_ERR_TIMEO (30*HZ)
c12b395a	10
1da177e4 LT	11	/* capable of sending packets */
	12	#define IP6_TNL_F_CAP_XMIT 0x10000
	13	/* capable of receiving packets */
	14	#define IP6_TNL_F_CAP_RCV 0x20000
d0087b29 VN	15	/* determine capability on a per-packet basis */
d0087b29 VN	16	#define IP6_TNL_F_CAP_PER_PACKET 0x40000
1da177e4	17
c12b395a	18	struct __ip6_tnl_parm {
	19	char name[IFNAMSIZ]; /* name of tunnel device */
	20	int link; /* ifindex of underlying L2 interface */
	21	__u8 proto; /* tunnel protocol */
	22	__u8 encap_limit; /* encapsulation limit for tunnel */
	23	__u8 hop_limit; /* hop limit for tunnel */
	24	__be32 flowinfo; /* traffic class and flowlabel for tunnel */
	25	__u32 flags; /* tunnel flags */
	26	struct in6_addr laddr; /* local tunnel end-point address */
	27	struct in6_addr raddr; /* remote tunnel end-point address */
	28
	29	__be16 i_flags;
	30	__be16 o_flags;
	31	__be32 i_key;
	32	__be32 o_key;
	33	};
1da177e4	34
c12b395a	35	/* IPv6 tunnel */
1da177e4	36	struct ip6_tnl {
6f0bcf15	37	struct ip6_tnl __rcu next; / next tunnel in list */
1da177e4	38	struct net_device dev; / virtual device associated with tunnel */
0bd87628	39	struct net net; / netns for packet i/o */
c12b395a	40	struct __ip6_tnl_parm parms; /* tunnel configuration parameters */
1da177e4 LT	41	struct flowi fl; /* flowi template for xmit */
	42	struct dst_entry dst_cache; / cached dst */
	43	u32 dst_cookie;
c12b395a	44
	45	int err_count;
	46	unsigned long err_time;
	47
	48	/* These fields used only by GRE */
	49	__u32 i_seqno; /* The last seen seqno */
	50	__u32 o_seqno; /* The last output seqno */
	51	int hlen; /* Precalculated GRE header length */
	52	int mlink;
1da177e4 LT	53	};
	54
	55	/* Tunnel encapsulation limit destination sub-option */
	56
	57	struct ipv6_tlv_tnl_enc_lim {
	58	__u8 type; /* type-code for option */
	59	__u8 length; /* option length */
	60	__u8 encap_limit; /* tunnel encapsulation limit */
bc10502d	61	} __packed;
1da177e4	62
c12b395a	63	struct dst_entry ip6_tnl_dst_check(struct ip6_tnl t);
	64	void ip6_tnl_dst_reset(struct ip6_tnl *t);
	65	void ip6_tnl_dst_store(struct ip6_tnl t, struct dst_entry dst);
	66	int ip6_tnl_rcv_ctl(struct ip6_tnl t, const struct in6_addr laddr,
	67	const struct in6_addr *raddr);
d5005140 SK	68	int ip6_tnl_xmit_ctl(struct ip6_tnl t, const struct in6_addr laddr,
d5005140 SK	69	const struct in6_addr *raddr);
c12b395a	70	__u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff skb, __u8 raw);
	71	__u32 ip6_tnl_get_cap(struct ip6_tnl t, const struct in6_addr laddr,
	72	const struct in6_addr *raddr);
1728d4fa	73	struct net ip6_tnl_get_link_net(const struct net_device dev);
c12b395a	74
e8f72ea4 CW	75	static inline void ip6tunnel_xmit(struct sk_buff skb, struct net_device dev)
	76	{
	77	struct net_device_stats *stats = &dev->stats;
	78	int pkt_len, err;
	79
e8f72ea4 CW	80	pkt_len = skb->len;
	81	err = ip6_local_out(skb);
	82
	83	if (net_xmit_eval(err) == 0) {
8f84985f	84	struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
e8f72ea4 CW	85	u64_stats_update_begin(&tstats->syncp);
	86	tstats->tx_bytes += pkt_len;
	87	tstats->tx_packets++;
	88	u64_stats_update_end(&tstats->syncp);
	89	} else {
	90	stats->tx_errors++;
	91	stats->tx_aborted_errors++;
	92	}
	93	}
1da177e4	94	#endif