add functions to initialize a trunk, and a public function to receive from layer 3 that sends an I frame.
git-svn-id: http://svn.openzap.org/svn/openzap/trunk@86 a93c3328-9c30-0410-af19-c9cd2b2d52af
This commit is contained in:
Michael Jerris
parent
65bf12a048
commit
45268b86af
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@ -1,424 +1,458 @@
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/*****************************************************************************
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FileName: q921.c
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Description: Contains the implementation of a Q.921 protocol on top of the
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Comet 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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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
|
||||
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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#include "Q921.h"
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#include <stdlib.h>
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#include "mfifo.h"
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/*****************************************************************************
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Global Tables & Variables.
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*****************************************************************************/
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Q921Data Q921DevSpace[Q921MAXTRUNK];
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int Q921HeaderSpace={0};
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int (*Q921Tx21Proc)(int dev, L2UCHAR *, int)={NULL};
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int (*Q921Tx23Proc)(int dev, L2UCHAR *, int)={NULL};
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/*****************************************************************************
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Function: Q921Init
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Decription: Initialize the Q.921 stack so it is ready for use. This
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function MUST be called as part of initializing the
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application.
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*****************************************************************************/
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void Q921Init()
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{
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int x;
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for(x=0; x<Q921MAXTRUNK;x++)
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{
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MFIFOCreate(Q921DevSpace[x].HDLCInQueue, Q921MAXHDLCSPACE, 10);
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Q921DevSpace[x].vr=0;
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Q921DevSpace[x].vs=0;
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Q921DevSpace[x].state=0;;
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}
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}
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void Q921SetHeaderSpace(int hspace)
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{
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Q921HeaderSpace=hspace;
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}
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void Q921SetTx21CB(int (*callback)(int dev, L2UCHAR *, int))
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{
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Q921Tx21Proc = callback;
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}
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void Q921SetTx23CB(int (*callback)(int dev, L2UCHAR *, int))
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{
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Q921Tx23Proc = callback;
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}
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/*****************************************************************************
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Function: Q921QueueHDLCFrame
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Description: Called to receive and queue an incoming HDLC frame. Will
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queue this in Q921HDLCInQueue. The called must either call
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Q921Rx12 directly afterwards or signal Q921Rx12 to be called
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later. Q921Rx12 will read from the same queue and process
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the frame.
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This function assumes that the message contains header
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space. This is removed for internal Q921 processing, but
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must be keept for I frames.
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Parameters: trunk trunk #
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b ptr to frame;
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size size of frame in bytes
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*****************************************************************************/
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int Q921QueueHDLCFrame(int trunk, L2UCHAR *b, int size)
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{
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return MFIFOWriteMes(Q921DevSpace[trunk].HDLCInQueue, b, size);
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}
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/*****************************************************************************
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Function: Q921SendI
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Description: Compose and Send I Frame to layer. Will receive an I frame
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with space for L2 header and fill out that header before
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it call Q921Tx21Proc.
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Parameters: trunk trunk #
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Sapi Sapi
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cr C/R field.
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Tei Tei.
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pf P fiels octet 5
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mes ptr to I frame message.
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size size of message in bytes.
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Return Value: 0 if failed, 1 if Send.
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*****************************************************************************/
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int Q921SendI(int trunk, L2UCHAR Sapi, char cr, L2UCHAR Tei, char pf, L2UCHAR *mes, int size)
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{
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mes[Q921HeaderSpace+0] = (Sapi&0xfc) | ((cr<<1)&0x02);
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mes[Q921HeaderSpace+1] = (Tei<<1) | 0x01;
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mes[Q921HeaderSpace+2] = Q921DevSpace[trunk].vs<<1;
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mes[Q921HeaderSpace+3] = (Q921DevSpace[trunk].vr<<1) | (pf & 0x01);
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Q921DevSpace[trunk].vs++;
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return Q921Tx21Proc(trunk, mes, size);
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}
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/*****************************************************************************
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Function: Q921SendRR
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Description: Compose and send Receive Ready.
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Parameters: trunk trunk #
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Sapi Sapi
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cr C/R field.
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Tei Tei.
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pf P/F fiels octet 5
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Return Value: 0 if failed, 1 if Send.
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*****************************************************************************/
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int Q921SendRR(int trunk, int Sapi, int cr, int Tei, int pf)
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{
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L2UCHAR mes[400];
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mes[Q921HeaderSpace+0] = (L2UCHAR)((Sapi&0xfc) | ((cr<<1)&0x02));
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mes[Q921HeaderSpace+1] = (L2UCHAR)((Tei<<1) | 0x01);
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mes[Q921HeaderSpace+2] = (L2UCHAR)0x01;
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mes[Q921HeaderSpace+3] = (L2UCHAR)((Q921DevSpace[trunk].vr<<1) | (pf & 0x01));
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return Q921Tx21Proc(trunk, mes, Q921HeaderSpace+4);
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}
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/*****************************************************************************
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Function: Q921SendRNR
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Description: Compose and send Receive Nor Ready
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Parameters: trunk trunk #
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Sapi Sapi
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cr C/R field.
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Tei Tei.
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pf P/F fiels octet 5
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Return Value: 0 if failed, 1 if Send.
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*****************************************************************************/
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int Q921SendRNR(int trunk, int Sapi, int cr, int Tei, int pf)
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{
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L2UCHAR mes[400];
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mes[Q921HeaderSpace+0] = (L2UCHAR)((Sapi&0xfc) | ((cr<<1)&0x02));
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mes[Q921HeaderSpace+1] = (L2UCHAR)((Tei<<1) | 0x01);
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mes[Q921HeaderSpace+2] = (L2UCHAR)0x05;
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mes[Q921HeaderSpace+3] = (L2UCHAR)((Q921DevSpace[trunk].vr<<1) | (pf & 0x01));
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return Q921Tx21Proc(trunk, mes, Q921HeaderSpace+4);
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}
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/*****************************************************************************
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Function: Q921SendREJ
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Description: Compose and Send Reject.
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Parameters: trunk trunk #
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Sapi Sapi
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cr C/R field.
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Tei Tei.
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pf P/F fiels octet 5
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Return Value: 0 if failed, 1 if Send.
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*****************************************************************************/
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int Q921SendREJ(int trunk, int Sapi, int cr, int Tei, int pf)
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{
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L2UCHAR mes[400];
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mes[Q921HeaderSpace+0] = (L2UCHAR)((Sapi&0xfc) | ((cr<<1)&0x02));
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mes[Q921HeaderSpace+1] = (L2UCHAR)((Tei<<1) | 0x01);
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mes[Q921HeaderSpace+2] = (L2UCHAR)0x09;
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mes[Q921HeaderSpace+3] = (L2UCHAR)((Q921DevSpace[trunk].vr<<1) | (pf & 0x01));
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return Q921Tx21Proc(trunk, mes, Q921HeaderSpace+4);
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}
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/*****************************************************************************
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Function: Q921SendSABME
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Description: Compose and send SABME
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Parameters: trunk trunk #
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Sapi Sapi
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cr C/R field.
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Tei Tei.
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pf P fiels octet 4
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Return Value: 0 if failed, 1 if Send.
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*****************************************************************************/
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int Q921SendSABME(int trunk, int Sapi, int cr, int Tei, int pf)
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{
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L2UCHAR mes[400];
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mes[Q921HeaderSpace+0] = (L2UCHAR)((Sapi&0xfc) | ((cr<<1)&0x02));
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mes[Q921HeaderSpace+1] = (L2UCHAR)((Tei<<1) | 0x01);
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mes[Q921HeaderSpace+2] = (L2UCHAR)(0x6f | ((pf<<4)&0x10));
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return Q921Tx21Proc(trunk, mes, Q921HeaderSpace+3);
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}
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/*****************************************************************************
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Function: Q921SendDM
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Description: Comose and Send DM (Disconnected Mode)
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Parameters: trunk trunk #
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Sapi Sapi
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cr C/R field.
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Tei Tei.
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pf F fiels octet 4
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Return Value: 0 if failed, 1 if Send.
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*****************************************************************************/
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int Q921SendDM(int trunk, int Sapi, int cr, int Tei, int pf)
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{
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L2UCHAR mes[400];
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mes[Q921HeaderSpace+0] = (L2UCHAR)((Sapi&0xfc) | ((cr<<1)&0x02));
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mes[Q921HeaderSpace+1] = (L2UCHAR)((Tei<<1) | 0x01);
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mes[Q921HeaderSpace+2] = (L2UCHAR)(0x0f | ((pf<<4)&0x10));
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return Q921Tx21Proc(trunk, mes, Q921HeaderSpace+3);
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}
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/*****************************************************************************
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Function: Q921SendDISC
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Description: Compose and Send Disconnect
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Parameters: trunk trunk #
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Sapi Sapi
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cr C/R field.
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Tei Tei.
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pf P fiels octet 4
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Return Value: 0 if failed, 1 if Send.
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*****************************************************************************/
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int Q921SendDISC(int trunk, int Sapi, int cr, int Tei, int pf)
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{
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L2UCHAR mes[400];
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mes[Q921HeaderSpace+0] = (L2UCHAR)((Sapi&0xfc) | ((cr<<1)&0x02));
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mes[Q921HeaderSpace+1] = (L2UCHAR)((Tei<<1) | 0x01);
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mes[Q921HeaderSpace+2] = (L2UCHAR)(0x43 | ((pf<<4)&0x10));
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return Q921Tx21Proc(trunk, mes, Q921HeaderSpace+3);
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}
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/*****************************************************************************
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Function: Q921SendUA
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Description: Compose and Send UA
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Parameters: trunk trunk #
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Sapi Sapi
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cr C/R field.
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Tei Tei.
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pf F fiels octet 4
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Return Value: 0 if failed, 1 if Send.
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*****************************************************************************/
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int Q921SendUA(int trunk, int Sapi, int cr, int Tei, int pf)
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{
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L2UCHAR mes[400];
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mes[Q921HeaderSpace+0] = (L2UCHAR)((Sapi&0xfc) | ((cr<<1)&0x02));
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mes[Q921HeaderSpace+1] = (L2UCHAR)((Tei<<1) | 0x01);
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mes[Q921HeaderSpace+2] = (L2UCHAR)(0x63 | ((pf<<4)&0x10));
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return Q921Tx21Proc(trunk, mes, Q921HeaderSpace+3);
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}
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int Q921ProcSABME(int trunk, L2UCHAR *mes, int size)
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{
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/* TODO: Do we need these paramaters? */
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(void)mes;
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(void)size;
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Q921DevSpace[trunk].vr=0;
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Q921DevSpace[trunk].vs=0;
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return 1;
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}
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/*****************************************************************************
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Function: Q921Rx12
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Description: Called to process a message frame from layer 1. Will
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identify the message and call the proper 'processor' for
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layer 2 messages and forward I frames to the layer 3 entity.
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Q921Rx12 will check the input fifo for a message, and if a
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message exist process one message before it exits. The caller
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must either call Q921Rx12 polling or keep track on #
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messages in the queue.
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Parameters: trunk trunk #.
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Return Value: # messages processed (always 1 or 0).
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*****************************************************************************/
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int Q921Rx12(long trunk)
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{
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L2UCHAR *mes;
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int rs,size; /* receive size & Q921 frame size*/
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L2UCHAR *smes = MFIFOGetMesPtr(Q921DevSpace[trunk].HDLCInQueue, &size);
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if(smes != NULL)
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{
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rs = size - Q921HeaderSpace;
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mes = &smes[Q921HeaderSpace];
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/* check for I frame */
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if((mes[2] & 0x01) == 0)
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{
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if(Q921Tx23Proc(trunk, smes, size-2)) /* -2 to clip away CRC */
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{
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Q921DevSpace[trunk].vr++;
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Q921SendRR(trunk, (mes[0]&0xfc)>>2, (mes[0]>>1)&0x01,mes[1]>>1, mes[3]&0x01);
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}
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else
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{
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/* todo: whatever*/
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}
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}
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/* check for RR */
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else if(mes[2] ==0x01)
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{
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/* todo: check if RR is responce to I */
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Q921SendRR(trunk, (mes[0]&0xfc)>>2, (mes[0]>>1)&0x01,mes[1]>>1, mes[2]&0x01);
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}
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/* check for RNR */
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/* check for REJ */
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/* check for SABME */
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else if((mes[2] & 0xef) == 0x6f)
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{
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Q921ProcSABME(trunk, mes, rs);
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Q921SendUA(trunk, (mes[0]&0xfc)>>2, (mes[0]>>1)&0x01,mes[1]>>1, (mes[2]&0x10)>>4);
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}
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/* check for DM */
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/* check for UI */
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/* check for DISC */
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/* check for UA */
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/* check for FRMR */
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/* check for XID */
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else
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{
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/* what the ? Issue an error */
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/* Q921ErrorProc(trunk, Q921_UNKNOWNFRAME, mes, rs); */
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/* todo: REJ or FRMR */
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}
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MFIFOKillNext(Q921DevSpace[trunk].HDLCInQueue);
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return 1;
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}
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return 0;
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}
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|
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/*****************************************************************************
|
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|
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FileName: q921.c
|
||||
|
||||
Description: Contains the implementation of a Q.921 protocol on top of the
|
||||
Comet Driver.
|
||||
|
||||
Most of the work required to execute a Q.921 protocol is
|
||||
taken care of by the Comet ship and it's driver. This layer
|
||||
will simply configure and make use of these features to
|
||||
complete a Q.921 implementation.
|
||||
|
||||
Created: 27.dec.2000/JVB
|
||||
|
||||
License/Copyright:
|
||||
|
||||
Copyright (c) 2007, Jan Vidar Berger, Case Labs, Ltd. All rights reserved.
|
||||
email:janvb@caselaboratories.com
|
||||
|
||||
Redistribution and use in source and binary forms, with or without
|
||||
modification, are permitted provided that the following conditions are
|
||||
met:
|
||||
|
||||
* Redistributions of source code must retain the above copyright notice,
|
||||
this list of conditions and the following disclaimer.
|
||||
* Redistributions in binary form must reproduce the above copyright notice,
|
||||
this list of conditions and the following disclaimer in the documentation
|
||||
and/or other materials provided with the distribution.
|
||||
* Neither the name of the Case Labs, Ltd nor the names of its contributors
|
||||
may be used to endorse or promote products derived from this software
|
||||
without specific prior written permission.
|
||||
|
||||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
||||
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
POSSIBILITY OF SUCH DAMAGE.
|
||||
|
||||
*****************************************************************************/
|
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#include "Q921.h"
|
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#include <stdlib.h>
|
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#include "mfifo.h"
|
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|
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/*****************************************************************************
|
||||
Global Tables & Variables.
|
||||
*****************************************************************************/
|
||||
Q921Data Q921DevSpace[Q921MAXTRUNK];
|
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int Q921HeaderSpace={0};
|
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|
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int (*Q921Tx21Proc)(int dev, L2UCHAR *, int)={NULL};
|
||||
int (*Q921Tx23Proc)(int dev, L2UCHAR *, int)={NULL};
|
||||
|
||||
/*****************************************************************************
|
||||
|
||||
Function: Q921Init
|
||||
|
||||
Decription: Initialize the Q.921 stack so it is ready for use. This
|
||||
function MUST be called as part of initializing the
|
||||
application.
|
||||
|
||||
*****************************************************************************/
|
||||
void Q921Init()
|
||||
{
|
||||
int x;
|
||||
for(x=0; x<Q921MAXTRUNK;x++)
|
||||
{
|
||||
MFIFOCreate(Q921DevSpace[x].HDLCInQueue, Q921MAXHDLCSPACE, 10);
|
||||
Q921DevSpace[x].vr = 0;
|
||||
Q921DevSpace[x].vs = 0;
|
||||
Q921DevSpace[x].state = 0;
|
||||
Q921DevSpace[x].sapi = 0;
|
||||
Q921DevSpace[x].tei = 0;
|
||||
Q921DevSpace[x].NetUser = Q921_TE;
|
||||
}
|
||||
}
|
||||
|
||||
/*****************************************************************************
|
||||
|
||||
Function: Q921_InitTrunk
|
||||
|
||||
Decription: Initialize a Q.921 trunk so it is ready for use. This
|
||||
function should be called before you call the rx functions
|
||||
if your trunk will not use hardcoded tei and sapi of 0 or
|
||||
if your trunk is not TE (user) mode (i.e. NET).
|
||||
|
||||
*****************************************************************************/
|
||||
int Q921_InitTrunk(long trunk, int sapi, int tei, Q921NetUser_t NetUser)
|
||||
{
|
||||
if (trunk > Q921MAXTRUNK)
|
||||
return 0;
|
||||
|
||||
Q921DevSpace[trunk].sapi = sapi;
|
||||
Q921DevSpace[trunk].tei = tei;
|
||||
Q921DevSpace[trunk].NetUser = NetUser;
|
||||
return 1;
|
||||
}
|
||||
|
||||
void Q921SetHeaderSpace(int hspace)
|
||||
{
|
||||
Q921HeaderSpace=hspace;
|
||||
}
|
||||
|
||||
void Q921SetTx21CB(int (*callback)(int dev, L2UCHAR *, int))
|
||||
{
|
||||
Q921Tx21Proc = callback;
|
||||
}
|
||||
|
||||
void Q921SetTx23CB(int (*callback)(int dev, L2UCHAR *, int))
|
||||
{
|
||||
Q921Tx23Proc = callback;
|
||||
}
|
||||
|
||||
/*****************************************************************************
|
||||
|
||||
Function: Q921QueueHDLCFrame
|
||||
|
||||
Description: Called to receive and queue an incoming HDLC frame. Will
|
||||
queue this in Q921HDLCInQueue. The called must either call
|
||||
Q921Rx12 directly afterwards or signal Q921Rx12 to be called
|
||||
later. Q921Rx12 will read from the same queue and process
|
||||
the frame.
|
||||
|
||||
This function assumes that the message contains header
|
||||
space. This is removed for internal Q921 processing, but
|
||||
must be keept for I frames.
|
||||
|
||||
Parameters: trunk trunk #
|
||||
b ptr to frame;
|
||||
size size of frame in bytes
|
||||
|
||||
*****************************************************************************/
|
||||
int Q921QueueHDLCFrame(int trunk, L2UCHAR *b, int size)
|
||||
{
|
||||
return MFIFOWriteMes(Q921DevSpace[trunk].HDLCInQueue, b, size);
|
||||
}
|
||||
|
||||
/*****************************************************************************
|
||||
|
||||
Function: Q921SendI
|
||||
|
||||
Description: Compose and Send I Frame to layer. Will receive an I frame
|
||||
with space for L2 header and fill out that header before
|
||||
it call Q921Tx21Proc.
|
||||
|
||||
Parameters: trunk trunk #
|
||||
Sapi Sapi
|
||||
cr C/R field.
|
||||
Tei Tei.
|
||||
pf P fiels octet 5
|
||||
mes ptr to I frame message.
|
||||
size size of message in bytes.
|
||||
|
||||
Return Value: 0 if failed, 1 if Send.
|
||||
|
||||
*****************************************************************************/
|
||||
int Q921SendI(int trunk, L2UCHAR Sapi, char cr, L2UCHAR Tei, char pf, L2UCHAR *mes, int size)
|
||||
{
|
||||
mes[Q921HeaderSpace+0] = (Sapi&0xfc) | ((cr<<1)&0x02);
|
||||
mes[Q921HeaderSpace+1] = (Tei<<1) | 0x01;
|
||||
mes[Q921HeaderSpace+2] = Q921DevSpace[trunk].vs<<1;
|
||||
mes[Q921HeaderSpace+3] = (Q921DevSpace[trunk].vr<<1) | (pf & 0x01);
|
||||
Q921DevSpace[trunk].vs++;
|
||||
|
||||
return Q921Tx21Proc(trunk, mes, size);
|
||||
}
|
||||
|
||||
int Q921Rx32(long trunk, L2UCHAR * Mes, L2INT Size)
|
||||
{
|
||||
return Q921SendI(trunk,
|
||||
Q921DevSpace[x].sapi,
|
||||
Q921DevSpace[x].NetUser == Q921_TE ? 0 : 1;
|
||||
Q921DevSpace[x].tei,
|
||||
0,
|
||||
Mes,
|
||||
Size);
|
||||
}
|
||||
/*****************************************************************************
|
||||
|
||||
Function: Q921SendRR
|
||||
|
||||
Description: Compose and send Receive Ready.
|
||||
|
||||
Parameters: trunk trunk #
|
||||
Sapi Sapi
|
||||
cr C/R field.
|
||||
Tei Tei.
|
||||
pf P/F fiels octet 5
|
||||
|
||||
Return Value: 0 if failed, 1 if Send.
|
||||
|
||||
*****************************************************************************/
|
||||
|
||||
int Q921SendRR(int trunk, int Sapi, int cr, int Tei, int pf)
|
||||
{
|
||||
L2UCHAR mes[400];
|
||||
|
||||
mes[Q921HeaderSpace+0] = (L2UCHAR)((Sapi&0xfc) | ((cr<<1)&0x02));
|
||||
mes[Q921HeaderSpace+1] = (L2UCHAR)((Tei<<1) | 0x01);
|
||||
mes[Q921HeaderSpace+2] = (L2UCHAR)0x01;
|
||||
mes[Q921HeaderSpace+3] = (L2UCHAR)((Q921DevSpace[trunk].vr<<1) | (pf & 0x01));
|
||||
|
||||
return Q921Tx21Proc(trunk, mes, Q921HeaderSpace+4);
|
||||
}
|
||||
|
||||
/*****************************************************************************
|
||||
|
||||
Function: Q921SendRNR
|
||||
|
||||
Description: Compose and send Receive Nor Ready
|
||||
|
||||
Parameters: trunk trunk #
|
||||
Sapi Sapi
|
||||
cr C/R field.
|
||||
Tei Tei.
|
||||
pf P/F fiels octet 5
|
||||
|
||||
Return Value: 0 if failed, 1 if Send.
|
||||
|
||||
*****************************************************************************/
|
||||
int Q921SendRNR(int trunk, int Sapi, int cr, int Tei, int pf)
|
||||
{
|
||||
L2UCHAR mes[400];
|
||||
|
||||
mes[Q921HeaderSpace+0] = (L2UCHAR)((Sapi&0xfc) | ((cr<<1)&0x02));
|
||||
mes[Q921HeaderSpace+1] = (L2UCHAR)((Tei<<1) | 0x01);
|
||||
mes[Q921HeaderSpace+2] = (L2UCHAR)0x05;
|
||||
mes[Q921HeaderSpace+3] = (L2UCHAR)((Q921DevSpace[trunk].vr<<1) | (pf & 0x01));
|
||||
|
||||
return Q921Tx21Proc(trunk, mes, Q921HeaderSpace+4);
|
||||
}
|
||||
|
||||
/*****************************************************************************
|
||||
|
||||
Function: Q921SendREJ
|
||||
|
||||
Description: Compose and Send Reject.
|
||||
|
||||
Parameters: trunk trunk #
|
||||
Sapi Sapi
|
||||
cr C/R field.
|
||||
Tei Tei.
|
||||
pf P/F fiels octet 5
|
||||
|
||||
Return Value: 0 if failed, 1 if Send.
|
||||
|
||||
*****************************************************************************/
|
||||
int Q921SendREJ(int trunk, int Sapi, int cr, int Tei, int pf)
|
||||
{
|
||||
L2UCHAR mes[400];
|
||||
|
||||
mes[Q921HeaderSpace+0] = (L2UCHAR)((Sapi&0xfc) | ((cr<<1)&0x02));
|
||||
mes[Q921HeaderSpace+1] = (L2UCHAR)((Tei<<1) | 0x01);
|
||||
mes[Q921HeaderSpace+2] = (L2UCHAR)0x09;
|
||||
mes[Q921HeaderSpace+3] = (L2UCHAR)((Q921DevSpace[trunk].vr<<1) | (pf & 0x01));
|
||||
|
||||
return Q921Tx21Proc(trunk, mes, Q921HeaderSpace+4);
|
||||
}
|
||||
|
||||
/*****************************************************************************
|
||||
|
||||
Function: Q921SendSABME
|
||||
|
||||
Description: Compose and send SABME
|
||||
|
||||
Parameters: trunk trunk #
|
||||
Sapi Sapi
|
||||
cr C/R field.
|
||||
Tei Tei.
|
||||
pf P fiels octet 4
|
||||
|
||||
Return Value: 0 if failed, 1 if Send.
|
||||
|
||||
*****************************************************************************/
|
||||
int Q921SendSABME(int trunk, int Sapi, int cr, int Tei, int pf)
|
||||
{
|
||||
L2UCHAR mes[400];
|
||||
|
||||
mes[Q921HeaderSpace+0] = (L2UCHAR)((Sapi&0xfc) | ((cr<<1)&0x02));
|
||||
mes[Q921HeaderSpace+1] = (L2UCHAR)((Tei<<1) | 0x01);
|
||||
mes[Q921HeaderSpace+2] = (L2UCHAR)(0x6f | ((pf<<4)&0x10));
|
||||
|
||||
return Q921Tx21Proc(trunk, mes, Q921HeaderSpace+3);
|
||||
}
|
||||
|
||||
/*****************************************************************************
|
||||
|
||||
Function: Q921SendDM
|
||||
|
||||
Description: Comose and Send DM (Disconnected Mode)
|
||||
|
||||
Parameters: trunk trunk #
|
||||
Sapi Sapi
|
||||
cr C/R field.
|
||||
Tei Tei.
|
||||
pf F fiels octet 4
|
||||
|
||||
Return Value: 0 if failed, 1 if Send.
|
||||
|
||||
*****************************************************************************/
|
||||
int Q921SendDM(int trunk, int Sapi, int cr, int Tei, int pf)
|
||||
{
|
||||
L2UCHAR mes[400];
|
||||
|
||||
mes[Q921HeaderSpace+0] = (L2UCHAR)((Sapi&0xfc) | ((cr<<1)&0x02));
|
||||
mes[Q921HeaderSpace+1] = (L2UCHAR)((Tei<<1) | 0x01);
|
||||
mes[Q921HeaderSpace+2] = (L2UCHAR)(0x0f | ((pf<<4)&0x10));
|
||||
|
||||
return Q921Tx21Proc(trunk, mes, Q921HeaderSpace+3);
|
||||
}
|
||||
|
||||
/*****************************************************************************
|
||||
|
||||
Function: Q921SendDISC
|
||||
|
||||
Description: Compose and Send Disconnect
|
||||
|
||||
Parameters: trunk trunk #
|
||||
Sapi Sapi
|
||||
cr C/R field.
|
||||
Tei Tei.
|
||||
pf P fiels octet 4
|
||||
|
||||
Return Value: 0 if failed, 1 if Send.
|
||||
|
||||
*****************************************************************************/
|
||||
int Q921SendDISC(int trunk, int Sapi, int cr, int Tei, int pf)
|
||||
{
|
||||
L2UCHAR mes[400];
|
||||
|
||||
mes[Q921HeaderSpace+0] = (L2UCHAR)((Sapi&0xfc) | ((cr<<1)&0x02));
|
||||
mes[Q921HeaderSpace+1] = (L2UCHAR)((Tei<<1) | 0x01);
|
||||
mes[Q921HeaderSpace+2] = (L2UCHAR)(0x43 | ((pf<<4)&0x10));
|
||||
|
||||
return Q921Tx21Proc(trunk, mes, Q921HeaderSpace+3);
|
||||
}
|
||||
|
||||
/*****************************************************************************
|
||||
|
||||
Function: Q921SendUA
|
||||
|
||||
Description: Compose and Send UA
|
||||
|
||||
Parameters: trunk trunk #
|
||||
Sapi Sapi
|
||||
cr C/R field.
|
||||
Tei Tei.
|
||||
pf F fiels octet 4
|
||||
|
||||
Return Value: 0 if failed, 1 if Send.
|
||||
|
||||
*****************************************************************************/
|
||||
int Q921SendUA(int trunk, int Sapi, int cr, int Tei, int pf)
|
||||
{
|
||||
L2UCHAR mes[400];
|
||||
|
||||
mes[Q921HeaderSpace+0] = (L2UCHAR)((Sapi&0xfc) | ((cr<<1)&0x02));
|
||||
mes[Q921HeaderSpace+1] = (L2UCHAR)((Tei<<1) | 0x01);
|
||||
mes[Q921HeaderSpace+2] = (L2UCHAR)(0x63 | ((pf<<4)&0x10));
|
||||
|
||||
return Q921Tx21Proc(trunk, mes, Q921HeaderSpace+3);
|
||||
}
|
||||
|
||||
int Q921ProcSABME(int trunk, L2UCHAR *mes, int size)
|
||||
{
|
||||
/* TODO: Do we need these paramaters? */
|
||||
(void)mes;
|
||||
(void)size;
|
||||
|
||||
Q921DevSpace[trunk].vr=0;
|
||||
Q921DevSpace[trunk].vs=0;
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
/*****************************************************************************
|
||||
|
||||
Function: Q921Rx12
|
||||
|
||||
Description: Called to process a message frame from layer 1. Will
|
||||
identify the message and call the proper 'processor' for
|
||||
layer 2 messages and forward I frames to the layer 3 entity.
|
||||
|
||||
Q921Rx12 will check the input fifo for a message, and if a
|
||||
message exist process one message before it exits. The caller
|
||||
must either call Q921Rx12 polling or keep track on #
|
||||
messages in the queue.
|
||||
|
||||
Parameters: trunk trunk #.
|
||||
|
||||
Return Value: # messages processed (always 1 or 0).
|
||||
|
||||
*****************************************************************************/
|
||||
int Q921Rx12(long trunk)
|
||||
{
|
||||
L2UCHAR *mes;
|
||||
int rs,size; /* receive size & Q921 frame size*/
|
||||
L2UCHAR *smes = MFIFOGetMesPtr(Q921DevSpace[trunk].HDLCInQueue, &size);
|
||||
if(smes != NULL)
|
||||
{
|
||||
rs = size - Q921HeaderSpace;
|
||||
mes = &smes[Q921HeaderSpace];
|
||||
/* check for I frame */
|
||||
if((mes[2] & 0x01) == 0)
|
||||
{
|
||||
if(Q921Tx23Proc(trunk, smes, size-2)) /* -2 to clip away CRC */
|
||||
{
|
||||
Q921DevSpace[trunk].vr++;
|
||||
Q921SendRR(trunk, (mes[0]&0xfc)>>2, (mes[0]>>1)&0x01,mes[1]>>1, mes[3]&0x01);
|
||||
}
|
||||
else
|
||||
{
|
||||
/* todo: whatever*/
|
||||
}
|
||||
}
|
||||
|
||||
/* check for RR */
|
||||
else if(mes[2] ==0x01)
|
||||
{
|
||||
/* todo: check if RR is responce to I */
|
||||
Q921SendRR(trunk, (mes[0]&0xfc)>>2, (mes[0]>>1)&0x01,mes[1]>>1, mes[2]&0x01);
|
||||
}
|
||||
|
||||
/* check for RNR */
|
||||
/* check for REJ */
|
||||
/* check for SABME */
|
||||
else if((mes[2] & 0xef) == 0x6f)
|
||||
{
|
||||
Q921ProcSABME(trunk, mes, rs);
|
||||
Q921SendUA(trunk, (mes[0]&0xfc)>>2, (mes[0]>>1)&0x01,mes[1]>>1, (mes[2]&0x10)>>4);
|
||||
}
|
||||
|
||||
/* check for DM */
|
||||
/* check for UI */
|
||||
/* check for DISC */
|
||||
/* check for UA */
|
||||
/* check for FRMR */
|
||||
/* check for XID */
|
||||
|
||||
else
|
||||
{
|
||||
/* what the ? Issue an error */
|
||||
/* Q921ErrorProc(trunk, Q921_UNKNOWNFRAME, mes, rs); */
|
||||
/* todo: REJ or FRMR */
|
||||
}
|
||||
|
||||
MFIFOKillNext(Q921DevSpace[trunk].HDLCInQueue);
|
||||
|
||||
return 1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -1,117 +1,128 @@
|
|||
/*****************************************************************************
|
||||
|
||||
FileName: q921.h
|
||||
|
||||
Description: Contains headers of a Q.921 protocol on top of the Comet
|
||||
Driver.
|
||||
|
||||
Most of the work required to execute a Q.921 protocol is
|
||||
taken care of by the Comet ship and it's driver. This layer
|
||||
will simply configure and make use of these features to
|
||||
complete a Q.921 implementation.
|
||||
|
||||
Note: This header file is the only include file that should be
|
||||
acessed by users of the Q.921 stack.
|
||||
|
||||
Interface: The Q.921 stack contains 2 layers.
|
||||
|
||||
- One interface layer.
|
||||
- One driver layer.
|
||||
|
||||
The interface layer contains the interface functions required
|
||||
for a layer 3 stack to be able to send and receive messages.
|
||||
|
||||
The driver layer will simply feed bytes into the ship as
|
||||
required and queue messages received out from the ship.
|
||||
|
||||
Q921TimeTick The Q.921 like any other blackbox
|
||||
modules contains no thread by it's own
|
||||
and must therefore be called regularly
|
||||
by an external 'thread' to do maintenance
|
||||
etc.
|
||||
|
||||
Q921Rx32 Receive message from layer 3. Called by
|
||||
the layer 3 stack to send a message.
|
||||
|
||||
Q921Tx23 Send a message to layer 3.
|
||||
|
||||
OnQ921Error Function called every if an error is
|
||||
deteceted.
|
||||
|
||||
OnQ921Log Function called if logging is active.
|
||||
|
||||
|
||||
<TODO> Maintenance/Configuration interface
|
||||
|
||||
Created: 27.dec.2000/JVB
|
||||
|
||||
License/Copyright:
|
||||
|
||||
Copyright (c) 2007, Jan Vidar Berger, Case Labs, Ltd. All rights reserved.
|
||||
email:janvb@caselaboratories.com
|
||||
|
||||
Redistribution and use in source and binary forms, with or without
|
||||
modification, are permitted provided that the following conditions are
|
||||
met:
|
||||
|
||||
* Redistributions of source code must retain the above copyright notice,
|
||||
this list of conditions and the following disclaimer.
|
||||
* Redistributions in binary form must reproduce the above copyright notice,
|
||||
this list of conditions and the following disclaimer in the documentation
|
||||
and/or other materials provided with the distribution.
|
||||
* Neither the name of the Case Labs, Ltd nor the names of its contributors
|
||||
may be used to endorse or promote products derived from this software
|
||||
without specific prior written permission.
|
||||
|
||||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
||||
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
POSSIBILITY OF SUCH DAMAGE.
|
||||
|
||||
*****************************************************************************/
|
||||
|
||||
#ifndef _Q921
|
||||
#define _Q921
|
||||
|
||||
#define Q921MAXTRUNK 4
|
||||
#define Q921MAXHDLCSPACE 3000
|
||||
|
||||
/*****************************************************************************
|
||||
|
||||
Some speed optimization can be achieved by changing all variables to the
|
||||
word size of your processor. A 32 bit processor have to do a lot of extra
|
||||
work to read a packed 8 bit integer. Changing all fields to 32 bit integer
|
||||
will ressult in usage of some extra space, but speed up the stack.
|
||||
|
||||
The stack have been designed to allow L3UCHAR etc. to be any size of 8 bit
|
||||
or larger.
|
||||
|
||||
*****************************************************************************/
|
||||
|
||||
#define L2UCHAR unsigned char /* Min 8 bit */
|
||||
#define L2INT int /* Min 16 bit signed */
|
||||
|
||||
typedef struct
|
||||
{
|
||||
L2UCHAR HDLCInQueue[Q921MAXHDLCSPACE];
|
||||
L2UCHAR vs;
|
||||
L2UCHAR vr;
|
||||
int state;
|
||||
}Q921Data;
|
||||
|
||||
void Q921Init();
|
||||
void Q921SetHeaderSpace(int hspace);
|
||||
void Q921SetTx21CB(int (*callback)(int dev, L2UCHAR *, int));
|
||||
void Q921SetTx23CB(int (*callback)(int dev, L2UCHAR *, int));
|
||||
int Q921QueueHDLCFrame(int trunk, L2UCHAR *b, int size);
|
||||
int Q921Rx12(long trunk);
|
||||
|
||||
#endif
|
||||
|
||||
/*****************************************************************************
|
||||
|
||||
FileName: q921.h
|
||||
|
||||
Description: Contains headers of a Q.921 protocol on top of the Comet
|
||||
Driver.
|
||||
|
||||
Most of the work required to execute a Q.921 protocol is
|
||||
taken care of by the Comet ship and it's driver. This layer
|
||||
will simply configure and make use of these features to
|
||||
complete a Q.921 implementation.
|
||||
|
||||
Note: This header file is the only include file that should be
|
||||
acessed by users of the Q.921 stack.
|
||||
|
||||
Interface: The Q.921 stack contains 2 layers.
|
||||
|
||||
- One interface layer.
|
||||
- One driver layer.
|
||||
|
||||
The interface layer contains the interface functions required
|
||||
for a layer 3 stack to be able to send and receive messages.
|
||||
|
||||
The driver layer will simply feed bytes into the ship as
|
||||
required and queue messages received out from the ship.
|
||||
|
||||
Q921TimeTick The Q.921 like any other blackbox
|
||||
modules contains no thread by it's own
|
||||
and must therefore be called regularly
|
||||
by an external 'thread' to do maintenance
|
||||
etc.
|
||||
|
||||
Q921Rx32 Receive message from layer 3. Called by
|
||||
the layer 3 stack to send a message.
|
||||
|
||||
Q921Tx23 Send a message to layer 3.
|
||||
|
||||
OnQ921Error Function called every if an error is
|
||||
deteceted.
|
||||
|
||||
OnQ921Log Function called if logging is active.
|
||||
|
||||
|
||||
<TODO> Maintenance/Configuration interface
|
||||
|
||||
Created: 27.dec.2000/JVB
|
||||
|
||||
License/Copyright:
|
||||
|
||||
Copyright (c) 2007, Jan Vidar Berger, Case Labs, Ltd. All rights reserved.
|
||||
email:janvb@caselaboratories.com
|
||||
|
||||
Redistribution and use in source and binary forms, with or without
|
||||
modification, are permitted provided that the following conditions are
|
||||
met:
|
||||
|
||||
* Redistributions of source code must retain the above copyright notice,
|
||||
this list of conditions and the following disclaimer.
|
||||
* Redistributions in binary form must reproduce the above copyright notice,
|
||||
this list of conditions and the following disclaimer in the documentation
|
||||
and/or other materials provided with the distribution.
|
||||
* Neither the name of the Case Labs, Ltd nor the names of its contributors
|
||||
may be used to endorse or promote products derived from this software
|
||||
without specific prior written permission.
|
||||
|
||||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
||||
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
POSSIBILITY OF SUCH DAMAGE.
|
||||
|
||||
*****************************************************************************/
|
||||
|
||||
#ifndef _Q921
|
||||
#define _Q921
|
||||
|
||||
#define Q921MAXTRUNK 4
|
||||
#define Q921MAXHDLCSPACE 3000
|
||||
|
||||
/*****************************************************************************
|
||||
|
||||
Some speed optimization can be achieved by changing all variables to the
|
||||
word size of your processor. A 32 bit processor have to do a lot of extra
|
||||
work to read a packed 8 bit integer. Changing all fields to 32 bit integer
|
||||
will ressult in usage of some extra space, but speed up the stack.
|
||||
|
||||
The stack have been designed to allow L3UCHAR etc. to be any size of 8 bit
|
||||
or larger.
|
||||
|
||||
*****************************************************************************/
|
||||
|
||||
#define L2UCHAR unsigned char /* Min 8 bit */
|
||||
#define L2INT int /* Min 16 bit signed */
|
||||
|
||||
typedef enum /* Network/User Mode. */
|
||||
{
|
||||
Q921_TE=0, /* 0 : User Mode */
|
||||
Q921_NT=1 /* 1 : Network Mode */
|
||||
} Q921NetUser_t;
|
||||
|
||||
typedef struct
|
||||
{
|
||||
L2UCHAR HDLCInQueue[Q921MAXHDLCSPACE];
|
||||
L2UCHAR vs;
|
||||
L2UCHAR vr;
|
||||
L2INT state;
|
||||
L2INT sapi;
|
||||
L2INT tei;
|
||||
Q921NetUser_t NetUser;
|
||||
|
||||
}Q921Data;
|
||||
|
||||
void Q921Init();
|
||||
int Q921_InitTrunk(long trunk, int sapi, int tei, Q921NetUser_t NetUser);
|
||||
void Q921SetHeaderSpace(int hspace);
|
||||
void Q921SetTx21CB(int (*callback)(int dev, L2UCHAR *, int));
|
||||
void Q921SetTx23CB(int (*callback)(int dev, L2UCHAR *, int));
|
||||
int Q921QueueHDLCFrame(int trunk, L2UCHAR *b, int size);
|
||||
int Q921Rx12(long trunk);
|
||||
|
||||
#endif
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue