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#ifndef __NET_IPIP_H
#define __NET_IPIP_H 1
#include <linux/if_tunnel.h>
/* Keep error state on tunnel for 30 sec */
#define IPTUNNEL_ERR_TIMEO (30*HZ)
struct ip_tunnel
{
struct ip_tunnel *next;
struct net_device *dev;
struct net_device_stats stat;
int recursion; /* Depth of hard_start_xmit recursion */
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;
};
#define IPTUNNEL_XMIT() do { \
int err; \
int pkt_len = skb->len; \
\
skb->ip_summed = CHECKSUM_NONE; \
iph->tot_len = htons(skb->len); \
ip_select_ident(iph, &rt->u.dst, NULL); \
ip_send_check(iph); \
\
err = NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, rt->u.dst.dev, dst_output);\
if (err == NET_XMIT_SUCCESS || err == NET_XMIT_CN) { \
stats->tx_bytes += pkt_len; \
stats->tx_packets++; \
} else { \
stats->tx_errors++; \
stats->tx_aborted_errors++; \
} \
} while (0)
extern int sit_init(void);
extern void sit_cleanup(void);
#endif