| Gao Feng | ab10dcc | 2016-08-09 12:38:24 +0800 | [diff] [blame^] | 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_GRE_PROTO 0x880B |
| 14 | #define PPTP_GRE_VER 0x1 |
| 15 | |
| 16 | #define PPTP_GRE_FLAG_C 0x80 |
| 17 | #define PPTP_GRE_FLAG_R 0x40 |
| 18 | #define PPTP_GRE_FLAG_K 0x20 |
| 19 | #define PPTP_GRE_FLAG_S 0x10 |
| 20 | #define PPTP_GRE_FLAG_A 0x80 |
| 21 | |
| 22 | #define PPTP_GRE_IS_C(f) ((f)&PPTP_GRE_FLAG_C) |
| 23 | #define PPTP_GRE_IS_R(f) ((f)&PPTP_GRE_FLAG_R) |
| 24 | #define PPTP_GRE_IS_K(f) ((f)&PPTP_GRE_FLAG_K) |
| 25 | #define PPTP_GRE_IS_S(f) ((f)&PPTP_GRE_FLAG_S) |
| 26 | #define PPTP_GRE_IS_A(f) ((f)&PPTP_GRE_FLAG_A) |
| 27 | |
| 28 | #define PPTP_HEADER_OVERHEAD (2+sizeof(struct pptp_gre_header)) |
| 29 | struct pptp_gre_header { |
| 30 | u8 flags; |
| 31 | u8 ver; |
| 32 | __be16 protocol; |
| 33 | __be16 payload_len; |
| 34 | __be16 call_id; |
| 35 | __be32 seq; |
| 36 | __be32 ack; |
| 37 | } __packed; |
| 38 | |
| 39 | |
| 40 | #endif |