/* SPDX-License-Identifier: GPL-2.0 */

  #ifndef _NET_PPTP_H
  #define _NET_PPTP_H
  
  #define PPP_LCP_ECHOREQ 0x09
  #define PPP_LCP_ECHOREP 0x0A
  #define SC_RCV_BITS     (SC_RCV_B7_1|SC_RCV_B7_0|SC_RCV_ODDP|SC_RCV_EVNP)
  
  #define MISSING_WINDOW 20
  #define WRAPPED(curseq, lastseq)\
  	((((curseq) & 0xffffff00) == 0) &&\
  	(((lastseq) & 0xffffff00) == 0xffffff00))

  #define PPTP_HEADER_OVERHEAD (2+sizeof(struct pptp_gre_header))
  struct pptp_gre_header {

  	struct gre_base_hdr gre_hd;

  	__be16 payload_len;
  	__be16 call_id;
  	__be32 seq;
  	__be32 ack;
  } __packed;
  
  
  #endif