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