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)) 15 struct 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