include/net/gre.h

   1 #ifndef __LINUX_GRE_H
   2 #define __LINUX_GRE_H
   3
   4 #include <linux/skbuff.h>
   5 #include <net/ip_tunnels.h>
   6
   7 struct gre_base_hdr {
   8         __be16 flags;
   9         __be16 protocol;
  10 };
  11 #define GRE_HEADER_SECTION 4
  12
  13 #define GREPROTO_CISCO          0
  14 #define GREPROTO_PPTP           1
  15 #define GREPROTO_MAX            2
  16 #define GRE_IP_PROTO_MAX        2
  17
  18 struct gre_protocol {
  19         int  (*handler)(struct sk_buff *skb);
  20         void (*err_handler)(struct sk_buff *skb, u32 info);
  21 };
  22
  23 int gre_add_protocol(const struct gre_protocol *proto, u8 version);
  24 int gre_del_protocol(const struct gre_protocol *proto, u8 version);
  25
  26 struct net_device *gretap_fb_dev_create(struct net *net, const char *name,
  27                                        u8 name_assign_type);
  28 #endif