include/net/ipip.h

   1 #ifndef __NET_IPIP_H
   2 #define __NET_IPIP_H 1
   3
   4 #include <linux/if_tunnel.h>
   5
   6 /* Keep error state on tunnel for 30 sec */
   7 #define IPTUNNEL_ERR_TIMEO      (30*HZ)
   8
   9 struct ip_tunnel
  10 {
  11         struct ip_tunnel        *next;
  12         struct device           *dev;
  13         struct net_device_stats stat;
  14
  15         int                     recursion;      /* Depth of hard_start_xmit recursion */
  16         int                     err_count;      /* Number of arrived ICMP errors */
  17         unsigned long           err_time;       /* Time when the last ICMP error arrived */
  18
  19         /* These four fields used only by GRE */
  20         __u32                   i_seqno;        /* The last seen seqno  */
  21         __u32                   o_seqno;        /* The last output seqno */
  22         int                     hlen;           /* Precalculated GRE header length */
  23         int                     mlink;
  24
  25         struct ip_tunnel_parm   parms;
  26 };
  27
  28 extern int      ipip_init(void);
  29 extern int      ipgre_init(void);
  30 extern int      sit_init(void);
  31 extern void     sit_cleanup(void);
  32
  33 #endif