180 lines
4 KiB
C
180 lines
4 KiB
C
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/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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ALGconn.h
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Abstract:
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This module contains declarations for the ALG transparent proxy's
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connection-management.
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Author:
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Qiang Wang (qiangw) 10-Apr-2000
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Revision History:
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--*/
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#pragma once
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#define ALG_BUFFER_RESERVE 12
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//
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// Structure: ALG_CONNECTION
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//
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// This structure encapsulates information about a control-channel accepted
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// on one of the interfaces over which the component is enabled.
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// Each entry is stored in the connection list of an interface,
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// and is uniquely identified by a 32-bit identifier assigned when the entry
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// is created.
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// As connection-requests are accepted for a connection-entry,
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// endpoints are created in the connection's list.
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// Access to the list is synchronized using the interface lock
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// for the interface on which the connection was created.
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//
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typedef struct _ALG_CONNECTION {
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LIST_ENTRY Link;
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ULONG ConnectionId;
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PALG_INTERFACE Interfacep;
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LIST_ENTRY ActiveEndpointList;
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} ALG_CONNECTION, *PALG_CONNECTION;
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typedef enum {
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AlgClientEndpointType,
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AlgHostEndpointType,
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AlgMaximumEndpointType
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} ALG_ENDPOINT_TYPE, *PALG_ENDPOINT_TYPE;
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//
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// Structure: ALG_ENDPOINT
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//
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// This structure encapsulates information about a ALG endpoint,
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// which is an active endpoint transferring data between a client and a host.
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// Each endpoint is stored in the endpoint list of the connection for which
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// it was created, and in the endpoint list of its connection's interface.
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//
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typedef struct _ALG_ENDPOINT {
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LIST_ENTRY ConnectionLink;
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LIST_ENTRY InterfaceLink;
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ULONG EndpointId;
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ULONG ConnectionId;
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PALG_INTERFACE Interfacep;
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ULONG Flags;
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ALG_ENDPOINT_TYPE Type;
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SOCKET ClientSocket;
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SOCKET HostSocket;
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ULONG BoundaryAddress;
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ULONG ActualClientAddress;
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ULONG ActualHostAddress;
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ULONG DestinationAddress;
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ULONG SourceAddress;
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ULONG NewDestinationAddress;
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ULONG NewSourceAddress;
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USHORT ActualClientPort;
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USHORT ActualHostPort;
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USHORT DestinationPort;
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USHORT SourcePort;
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USHORT NewDestinationPort;
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USHORT NewSourcePort;
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USHORT ReservedPort;
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} ALG_ENDPOINT, *PALG_ENDPOINT;
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#define ALG_ENDPOINT_FLAG_INITIAL_ENDPOINT 0x00000001
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#define ALG_ENDPOINT_FLAG_CLIENT_CLOSED 0x00000002
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#define ALG_ENDPOINT_FLAG_HOST_CLOSED 0x00000004
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#define ALG_ENDPOINT_FLAG_DELETE_CONNECTION 0x00000008
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//
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// ROUTINE DECLARATIONS
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//
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ULONG
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AlgActivateActiveEndpoint(
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PALG_INTERFACE Interfacep,
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PALG_ENDPOINT Endpointp
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);
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VOID
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AlgCloseActiveEndpoint(
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PALG_ENDPOINT Endpointp,
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SOCKET ClosedSocket
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);
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ULONG
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AlgCreateActiveEndpoint(
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PALG_CONNECTION Connectionp,
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ALG_ENDPOINT_TYPE Type,
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SOCKET ListeningSocket,
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SOCKET AcceptedSocket,
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PUCHAR AcceptBuffer,
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ULONG RemoteAddress,
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USHORT RemotePort,
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ULONG BoundaryAddress,
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OUT PALG_ENDPOINT* EndpointCreated OPTIONAL
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);
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ULONG
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AlgCreateConnection(
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PALG_INTERFACE Interfacep,
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SOCKET ListeningSocket,
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SOCKET AcceptedSocket,
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PUCHAR AcceptBuffer,
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OUT PALG_CONNECTION* ConnectionCreated OPTIONAL
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);
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VOID
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AlgDeleteActiveEndpoint(
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PALG_ENDPOINT Endpointp
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);
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VOID
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AlgDeleteConnection(
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PALG_CONNECTION Connectionp
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);
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PALG_ENDPOINT
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AlgLookupActiveEndpoint(
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PALG_CONNECTION Connectionp,
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ULONG EndpointId,
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PLIST_ENTRY* InsertionPoint OPTIONAL
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);
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PALG_CONNECTION
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AlgLookupConnection(
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PALG_INTERFACE Interfacep,
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ULONG ConnectionId,
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PLIST_ENTRY* InsertionPoint OPTIONAL
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);
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PALG_ENDPOINT
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AlgLookupInterfaceEndpoint(
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PALG_INTERFACE Interfacep,
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ULONG EndpointId,
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PLIST_ENTRY* InsertionPoint OPTIONAL
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);
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ULONG
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AlgReadActiveEndpoint(
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PALG_INTERFACE Interfacep,
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PALG_ENDPOINT Endpoint,
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SOCKET Socket,
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ULONG UserFlags OPTIONAL
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);
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ULONG
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AlgWriteActiveEndpoint(
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PALG_INTERFACE Interfacep,
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PALG_ENDPOINT Endpoint,
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SOCKET Socket,
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PNH_BUFFER Bufferp,
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ULONG Length,
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ULONG UserFlags OPTIONAL
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);
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