[linux.git] / include / net / ipip.h

#ifndef __NET_IPIP_H
#define __NET_IPIP_H 1

#include <linux/if_tunnel.h>
#include <net/ip.h>

/* Keep error state on tunnel for 30 sec */
#define IPTUNNEL_ERR_TIMEO	(30*HZ)

/* 6rd prefix/relay information */
struct ip_tunnel_6rd_parm {
	struct in6_addr		prefix;
	__be32			relay_prefix;
	u16			prefixlen;
	u16			relay_prefixlen;
};

struct ip_tunnel {
	struct ip_tunnel	*next;
	struct net_device	*dev;

	int			err_count;	/* Number of arrived ICMP errors */
	unsigned long		err_time;	/* Time when the last ICMP error arrived */

	/* These four 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;

	struct ip_tunnel_parm	parms;

	/* for SIT */
#ifdef CONFIG_IPV6_SIT_6RD
	struct ip_tunnel_6rd_parm	ip6rd;
#endif
	struct ip_tunnel_prl_entry	*prl;		/* potential router list */
	unsigned int			prl_count;	/* # of entries in PRL */
};

struct ip_tunnel_prl_entry {
	struct ip_tunnel_prl_entry	*next;
	__be32				addr;
	u16				flags;
	struct rcu_head			rcu_head;
};

#define IPTUNNEL_XMIT() do {						\
	int err;							\
	int pkt_len = skb->len - skb_transport_offset(skb);		\
									\
	skb->ip_summed = CHECKSUM_NONE;					\
	ip_select_ident(iph, &rt->u.dst, NULL);				\
									\
	err = ip_local_out(skb);					\
	if (likely(net_xmit_eval(err) == 0)) {				\
		txq->tx_bytes += pkt_len;				\
		txq->tx_packets++;					\
	} else {							\
		stats->tx_errors++;					\
		stats->tx_aborted_errors++;				\
	}								\
} while (0)

#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef __NET_IPIP_H
	2	#define __NET_IPIP_H 1
	3
	4	#include <linux/if_tunnel.h>
c439cb2e	5	#include <net/ip.h>
1da177e4 LT	6
	7	/* Keep error state on tunnel for 30 sec */
	8	#define IPTUNNEL_ERR_TIMEO (30*HZ)
	9
fa857afc	10	/* 6rd prefix/relay information */
fd2c3ef7	11	struct ip_tunnel_6rd_parm {
fa857afc YH	12	struct in6_addr prefix;
	13	__be32 relay_prefix;
	14	u16 prefixlen;
	15	u16 relay_prefixlen;
	16	};
	17
fd2c3ef7	18	struct ip_tunnel {
1da177e4 LT	19	struct ip_tunnel *next;
1da177e4 LT	20	struct net_device *dev;
1da177e4	21
1da177e4 LT	22	int err_count; /* Number of arrived ICMP errors */
	23	unsigned long err_time; /* Time when the last ICMP error arrived */
	24
	25	/* These four fields used only by GRE */
	26	__u32 i_seqno; /* The last seen seqno */
	27	__u32 o_seqno; /* The last output seqno */
	28	int hlen; /* Precalculated GRE header length */
	29	int mlink;
	30
	31	struct ip_tunnel_parm parms;
300aaeea	32
fa857afc YH	33	/* for SIT */
	34	#ifdef CONFIG_IPV6_SIT_6RD
	35	struct ip_tunnel_6rd_parm ip6rd;
	36	#endif
fadf6bf0	37	struct ip_tunnel_prl_entry prl; / potential router list */
300aaeea	38	unsigned int prl_count; /* # of entries in PRL */
fadf6bf0 TF	39	};
fadf6bf0 TF	40
fd2c3ef7	41	struct ip_tunnel_prl_entry {
fadf6bf0	42	struct ip_tunnel_prl_entry *next;
300aaeea YH	43	__be32 addr;
300aaeea YH	44	u16 flags;
ef9a9d11	45	struct rcu_head rcu_head;
1da177e4 LT	46	};
	47
	48	#define IPTUNNEL_XMIT() do { \
	49	int err; \
64194c31	50	int pkt_len = skb->len - skb_transport_offset(skb); \
1da177e4 LT	51	\
1da177e4 LT	52	skb->ip_summed = CHECKSUM_NONE; \
1da177e4	53	ip_select_ident(iph, &rt->u.dst, NULL); \
1da177e4	54	\
c439cb2e	55	err = ip_local_out(skb); \
0bfbedb1 ED	56	if (likely(net_xmit_eval(err) == 0)) { \
	57	txq->tx_bytes += pkt_len; \
	58	txq->tx_packets++; \
1da177e4 LT	59	} else { \
	60	stats->tx_errors++; \
	61	stats->tx_aborted_errors++; \
	62	} \
	63	} while (0)
	64
1da177e4	65	#endif