168 lines
5.2 KiB
C
168 lines
5.2 KiB
C
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/*++
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Copyright (c) 1997 Microsoft Corporation
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Module Name:
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channel.h
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Abstract:
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Definitions for H.323 TAPI Service Provider channel objects.
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Environment:
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User Mode - Win32
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Revision History:
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--*/
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#ifndef _INC_CHANNEL
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#define _INC_CHANNEL
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///////////////////////////////////////////////////////////////////////////////
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// //
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// Header files //
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// //
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///////////////////////////////////////////////////////////////////////////////
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#include "h323pdu.h"
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///////////////////////////////////////////////////////////////////////////////
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// //
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// Type definitions //
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// //
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///////////////////////////////////////////////////////////////////////////////
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typedef enum _H323_CHANNELSTATE {
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H323_CHANNELSTATE_ALLOCATED = 0,
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H323_CHANNELSTATE_CLOSED,
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H323_CHANNELSTATE_OPENING,
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H323_CHANNELSTATE_OPENED
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} H323_CHANNELSTATE, *PH323_CHANNELSTATE;
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typedef struct _H323_CHANNEL {
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H323_CHANNELSTATE nState; // state of channel
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STREAMSETTINGS Settings; // stream settings
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HANDLE hmChannel; // msp channel handle
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CC_HCHANNEL hccChannel; // intelcc channel handle
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CC_ADDR ccLocalRTPAddr; // local rtp address
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CC_ADDR ccLocalRTCPAddr; // local rtcp address
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CC_ADDR ccRemoteRTPAddr; // remote rtp address
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CC_ADDR ccRemoteRTCPAddr; // remote rtcp address
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CC_TERMCAP ccTermCaps; // channel capabilities
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BYTE bPayloadType; // rtp payload type
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BYTE bSessionID; // rtp session id
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BOOL fInbound; // inbound channel
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struct _H323_CALL * pCall; // containing call object
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} H323_CHANNEL, *PH323_CHANNEL;
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typedef struct _H323_CHANNEL_TABLE {
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DWORD dwNumSlots; // number of entries
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DWORD dwNumInUse; // number of entries in use
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DWORD dwNumAllocated; // number of entries allocated
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DWORD dwNextAvailable; // next available table index
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PH323_CHANNEL pChannels[ANYSIZE]; // array of object pointers
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} H323_CHANNEL_TABLE, *PH323_CHANNEL_TABLE;
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///////////////////////////////////////////////////////////////////////////////
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// //
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// Macros //
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// //
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///////////////////////////////////////////////////////////////////////////////
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#define H323IsChannelAllocated(_pChannel_) \
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((_pChannel_) != NULL)
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#define H323IsChannelInUse(_pChannel_) \
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(H323IsChannelAllocated(_pChannel_) && \
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((_pChannel_)->nState > H323_CHANNELSTATE_ALLOCATED))
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#define H323IsChannelOpen(_pChannel_) \
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(H323IsChannelAllocated(_pChannel_) && \
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((_pChannel_)->nState == H323_CHANNELSTATE_OPENED))
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#define H323IsChannelEqual(_pChannel_,_hccChannel_) \
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(H323IsChannelInUse(_pChannel_) && \
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((_hccChannel_) == ((_pChannel_)->hccChannel)))
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#define H323IsSessionIDEqual(_pChannel_,_bSessionID_) \
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(H323IsChannelInUse(_pChannel_) && \
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((_bSessionID_) == ((_pChannel_)->bSessionID)))
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#define H323IsChannelInbound(_pChannel_) \
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((_pChannel_)->fInbound == TRUE)
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///////////////////////////////////////////////////////////////////////////////
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// //
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// Public prototypes //
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// //
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///////////////////////////////////////////////////////////////////////////////
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BOOL
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H323OpenChannel(
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PH323_CHANNEL pChannel
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);
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BOOL
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H323CloseChannel(
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PH323_CHANNEL pChannel
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);
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BOOL
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H323AllocChannelTable(
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PH323_CHANNEL_TABLE * ppChannelTable
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);
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BOOL
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H323FreeChannelTable(
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PH323_CHANNEL_TABLE pChannelTable
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);
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BOOL
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H323CloseChannelTable(
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PH323_CHANNEL_TABLE pChannelTable
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);
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BOOL
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H323AllocChannelFromTable(
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PH323_CHANNEL * ppChannel,
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PH323_CHANNEL_TABLE * ppChannelTable,
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struct _H323_CALL * pCall
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);
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BOOL
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H323FreeChannelFromTable(
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PH323_CHANNEL pChannel,
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PH323_CHANNEL_TABLE pChannelTable
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);
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BOOL
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H323LookupChannelByHandle(
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PH323_CHANNEL * ppChannel,
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PH323_CHANNEL_TABLE pChannelTable,
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CC_HCHANNEL hccChannel
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);
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BOOL
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H323LookupChannelBySessionID(
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PH323_CHANNEL * ppChannel,
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PH323_CHANNEL_TABLE pChannelTable,
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BYTE bSessionID
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);
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BOOL
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H323AreThereOutgoingChannels(
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PH323_CHANNEL_TABLE pChannelTable,
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BOOL fIgnoreOpenChannels
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);
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#endif // _INC_CHANNEL
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