75 lines
2.4 KiB
C
75 lines
2.4 KiB
C
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// Copyright (c) 1997, Microsoft Corporation, all rights reserved
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//
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// l2tp.h
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//
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// Public header for NDIS 5.0 clients and call managers wishing to make calls
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// and register Service Access Points using L2TP, the Layer 2 Tunneling
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// Protocol.
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//
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// 01/07/97 Steve Cobb
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//
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//
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// About NdisClRegisterSap 'Sap':
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//
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// Clients registering an L2TP SAP via NdisClRegisterSap should pass for the
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// 'Sap' argument either NULL or an CO_AF_TAPI_SAP structure. L2TP currently
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// supports only a single SAP so the CO_AF_TAPI_SAP, if passed, will be
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// ignored.
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//
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//
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// About NdisClMakeCall 'CallParameters':
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//
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// Clients calling NdisClMakeCall on an L2TP VC should pass
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// CO_AF_TAPI_MAKE_CALL_PARAMETERS as the media specific CallParameters
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// argument, i.e. CallParameters->MediaParameters->MediaSpecific.Parameters.
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// An L2TP_CALL_PARAMETERS structure (below) should be passed in the
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// DevSpecificData field of the LINE_CALL_PARAMS within the above structure.
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// While it is recommended that caller provide L2TP_CALL_PARAMETERS, the
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// driver will accept calls made with none in which case defaults will be
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// used.
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#ifndef _L2TP_H_
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#define _L2TP_H_
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// CO_AF_TAPI_MAKE_CALL_PARAMETERS.LineCallParams.ulDevSpecificOffset for L2TP
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// calls. This is passed down on NdisClMakeCall and returned to client's
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// ClMakeCallCompleteHandler handler.
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//
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typedef struct
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_L2TP_CALL_PARAMETERS
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{
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// L2TPCPF_* bit flags indicating various call options.
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//
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// L2TPCPF_ExclusiveTunnel: Set when an exclusive tunnel is to be created
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// to the peer even if another tunnel already exists to the peer.
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//
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ULONG ulFlags;
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#define L2TPCPF_ExclusiveTunnel 0x00000001
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// The vendor-specific physical channel ID of the call reported to LNS by
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// LAC.
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//
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// To MakeCall: The ID reported to peer LNS, or 0xFFFFFFFF for none. This
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// has effect only if the OutgoingRole is LAC.
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//
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// From MakeCallCompleteHandler: The ID reported by the L2TP LAC or
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// 0xFFFFFFFF if none.
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//
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ULONG ulPhysicalChannelId;
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// The reasonably unique, progressively increasing call serial number
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// shared by both L2TP peers for troubleshooting.
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//
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// To MakeCall: Must be set to 0, though ignored.
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//
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// From MakeCallCompleteHandler: The number assigned to the call.
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//
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ULONG ulCallSerialNumber;
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}
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L2TP_CALL_PARAMETERS;
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#endif // _L2TP_H_
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