1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _NET_PPTP_H 3#define _NET_PPTP_H 4 5#define PPP_LCP_ECHOREQ 0x09 6#define PPP_LCP_ECHOREP 0x0A 7#define SC_RCV_BITS (SC_RCV_B7_1|SC_RCV_B7_0|SC_RCV_ODDP|SC_RCV_EVNP) 8 9#define MISSING_WINDOW 20 10#define WRAPPED(curseq, lastseq)\ 11 ((((curseq) & 0xffffff00) == 0) &&\ 12 (((lastseq) & 0xffffff00) == 0xffffff00)) 13 14#define PPTP_HEADER_OVERHEAD (2+sizeof(struct pptp_gre_header)) 15struct pptp_gre_header { 16 struct gre_base_hdr gre_hd; 17 __be16 payload_len; 18 __be16 call_id; 19 __be32 seq; 20 __be32 ack; 21} __packed; 22 23 24#endif 25