pptp: Refactor the struct and macros of PPTP codes
1. Use struct gre_base_hdr directly in pptp_gre_header instead of duplicated members; 2. Use existing macros like GRE_KEY, GRE_SEQ, and so on instead of duplicated macros defined by PPTP; 3. Add new macros like GRE_IS_ACK/SEQ and so on instead of PPTP_GRE_IS_A/S and so on; Signed-off-by: Gao Feng <fgao@ikuai8.com> Reviewed-by: Philip Prindeville <philipp@redfish-solutions.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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David S. Miller

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@@ -28,8 +28,16 @@
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#define GRE_FLAGS __cpu_to_be16(0x0078)
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#define GRE_VERSION __cpu_to_be16(0x0007)
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#define GRE_VERSION_1 __cpu_to_be16(0x0001)
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#define GRE_PROTO_PPP __cpu_to_be16(0x880b)
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#define GRE_IS_CSUM(f) ((f) & GRE_CSUM)
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#define GRE_IS_ROUTING(f) ((f) & GRE_ROUTING)
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#define GRE_IS_KEY(f) ((f) & GRE_KEY)
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#define GRE_IS_SEQ(f) ((f) & GRE_SEQ)
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#define GRE_IS_STRICT(f) ((f) & GRE_STRICT)
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#define GRE_IS_REC(f) ((f) & GRE_REC)
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#define GRE_IS_ACK(f) ((f) & GRE_ACK)
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#define GRE_VERSION_1 __cpu_to_be16(0x0001)
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#define GRE_PROTO_PPP __cpu_to_be16(0x880b)
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#define GRE_PPTP_KEY_MASK __cpu_to_be32(0xffff)
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struct ip_tunnel_parm {
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