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41 lines
971 B
C
41 lines
971 B
C
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#ifndef _NET_PPTP_H
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#define _NET_PPTP_H
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#define PPP_LCP_ECHOREQ 0x09
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#define PPP_LCP_ECHOREP 0x0A
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#define SC_RCV_BITS (SC_RCV_B7_1|SC_RCV_B7_0|SC_RCV_ODDP|SC_RCV_EVNP)
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#define MISSING_WINDOW 20
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#define WRAPPED(curseq, lastseq)\
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((((curseq) & 0xffffff00) == 0) &&\
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(((lastseq) & 0xffffff00) == 0xffffff00))
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#define PPTP_GRE_PROTO 0x880B
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#define PPTP_GRE_VER 0x1
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#define PPTP_GRE_FLAG_C 0x80
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#define PPTP_GRE_FLAG_R 0x40
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#define PPTP_GRE_FLAG_K 0x20
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#define PPTP_GRE_FLAG_S 0x10
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#define PPTP_GRE_FLAG_A 0x80
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#define PPTP_GRE_IS_C(f) ((f)&PPTP_GRE_FLAG_C)
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#define PPTP_GRE_IS_R(f) ((f)&PPTP_GRE_FLAG_R)
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#define PPTP_GRE_IS_K(f) ((f)&PPTP_GRE_FLAG_K)
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#define PPTP_GRE_IS_S(f) ((f)&PPTP_GRE_FLAG_S)
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#define PPTP_GRE_IS_A(f) ((f)&PPTP_GRE_FLAG_A)
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#define PPTP_HEADER_OVERHEAD (2+sizeof(struct pptp_gre_header))
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struct pptp_gre_header {
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u8 flags;
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u8 ver;
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__be16 protocol;
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__be16 payload_len;
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__be16 call_id;
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__be32 seq;
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__be32 ack;
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} __packed;
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#endif
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