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)) 14 struct 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