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103 lines
4.1 KiB
C
103 lines
4.1 KiB
C
/*****************************************************************************
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FileName: q921.h
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Description: Contains headers of a Q.921 protocol on top of the Comet
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Driver.
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Most of the work required to execute a Q.921 protocol is
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taken care of by the Comet ship and it's driver. This layer
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will simply configure and make use of these features to
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complete a Q.921 implementation.
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Note: This header file is the only include file that should be
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acessed by users of the Q.921 stack.
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Interface: The Q.921 stack contains 2 layers.
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- One interface layer.
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- One driver layer.
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The interface layer contains the interface functions required
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for a layer 3 stack to be able to send and receive messages.
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The driver layer will simply feed bytes into the ship as
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required and queue messages received out from the ship.
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Q921TimeTick The Q.921 like any other blackbox
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modules contains no thread by it's own
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and must therefore be called regularly
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by an external 'thread' to do maintenance
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etc.
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Q921Rx32 Receive message from layer 3. Called by
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the layer 3 stack to send a message.
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Q921Tx23 Send a message to layer 3.
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OnQ921Error Function called every if an error is
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deteceted.
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OnQ921Log Function called if logging is active.
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<TODO> Maintenance/Configuration interface
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Created: 27.dec.2000/JVB
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License/Copyright:
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Copyright (c) 2007, Jan Vidar Berger, Case Labs, Ltd. All rights reserved.
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email:janvb@caselaboratories.com
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of the Case Labs, Ltd nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*****************************************************************************/
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#ifndef _Q921
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#define _Q921
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#define Q921MAXTRUNK 4
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#define Q921MAXHDLCSPACE 3000
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typedef struct
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{
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unsigned char HDLCInQueue[Q921MAXHDLCSPACE];
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unsigned char vs;
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unsigned char vr;
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int state;
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}Q921Data;
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void Q921Init();
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void Q921SetHeaderSpace(int hspace);
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void Q921SetTx21CB(int (*callback)(int dev, unsigned char *, int));
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void Q921SetTx23CB(int (*callback)(int dev, unsigned char *, int));
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int Q921QueueHDLCFrame(int trunk, unsigned char *b, int size);
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int Q921Rx12(long trunk);
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#endif
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