1#ifndef __NET_IPIP_H
 2#define __NET_IPIP_H 1
 3
 4#include <linux/if_tunnel.h>
 5#include <net/ip.h>
 6
 7/* Keep error state on tunnel for 30 sec */
 8#define IPTUNNEL_ERR_TIMEO	(30*HZ)
 9
10/* 6rd prefix/relay information */
11struct ip_tunnel_6rd_parm {
12	struct in6_addr		prefix;
13	__be32			relay_prefix;
14	u16			prefixlen;
15	u16			relay_prefixlen;
16};
17
18struct ip_tunnel {
19	struct ip_tunnel __rcu	*next;
20	struct net_device	*dev;
21
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;
32
33	/* for SIT */
34#ifdef CONFIG_IPV6_SIT_6RD
35	struct ip_tunnel_6rd_parm	ip6rd;
36#endif
37	struct ip_tunnel_prl_entry __rcu *prl;		/* potential router list */
38	unsigned int			prl_count;	/* # of entries in PRL */
39};
40
41struct ip_tunnel_prl_entry {
42	struct ip_tunnel_prl_entry __rcu *next;
43	__be32				addr;
44	u16				flags;
45	struct rcu_head			rcu_head;
46};
47
48#define __IPTUNNEL_XMIT(stats1, stats2) do {				\
49	int err;							\
50	int pkt_len = skb->len - skb_transport_offset(skb);		\
51									\
52	skb->ip_summed = CHECKSUM_NONE;					\
53	ip_select_ident(iph, &rt->dst, NULL);				\
54									\
55	err = ip_local_out(skb);					\
56	if (likely(net_xmit_eval(err) == 0)) {				\
57		(stats1)->tx_bytes += pkt_len;				\
58		(stats1)->tx_packets++;					\
59	} else {							\
60		(stats2)->tx_errors++;					\
61		(stats2)->tx_aborted_errors++;				\
62	}								\
63} while (0)
64
65#define IPTUNNEL_XMIT() __IPTUNNEL_XMIT(txq, stats)
66
67#endif