708 lines
17 KiB
C
708 lines
17 KiB
C
/*
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* Copyright (c) 1997, 2000 Hellmuth Michaelis. All rights reserved.
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*
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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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* 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 AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*---------------------------------------------------------------------------
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*
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* i4b_q931.c - Q931 received messages handling
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* --------------------------------------------
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*
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* $Id: i4b_q931.c,v 1.32 2000/08/24 11:48:58 hm Exp $
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*
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* $FreeBSD$
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*
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* last edit-date: [Mon May 29 16:56:52 2000]
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*
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*---------------------------------------------------------------------------*/
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#ifdef __FreeBSD__
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#include "i4bq931.h"
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#else
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#define NI4BQ931 1
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#endif
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#if NI4BQ931 > 0
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
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#include <sys/callout.h>
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#endif
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#ifdef __FreeBSD__
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#include <machine/i4b_debug.h>
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#include <machine/i4b_ioctl.h>
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#include <machine/i4b_cause.h>
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#else
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#include <i4b/i4b_debug.h>
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#include <i4b/i4b_ioctl.h>
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#include <i4b/i4b_cause.h>
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#endif
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#include <i4b/include/i4b_isdnq931.h>
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#include <i4b/include/i4b_l3l4.h>
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#include <i4b/include/i4b_global.h>
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#include <i4b/layer3/i4b_l3.h>
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#include <i4b/layer3/i4b_l3fsm.h>
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#include <i4b/layer3/i4b_q931.h>
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#include <i4b/layer4/i4b_l4.h>
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#ifndef __FreeBSD__
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#define memcpy(d,s,l) bcopy(s,d,l)
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#endif
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unsigned int i4b_l3_debug = L3_DEBUG_DEFAULT;
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call_desc_t call_desc[N_CALL_DESC]; /* call descriptor array */
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ctrl_desc_t ctrl_desc[MAX_CONTROLLERS]; /* controller description array */
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int utoc_tab[MAX_CONTROLLERS]; /* unit to controller conversion */
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/* protocol independent causes -> Q.931 causes */
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unsigned char cause_tab_q931[CAUSE_I4B_MAX] = {
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CAUSE_Q850_NCCLR, /* CAUSE_I4B_NORMAL -> normal call clearing */
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CAUSE_Q850_USRBSY, /* CAUSE_I4B_BUSY -> user busy */
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CAUSE_Q850_NOCAVAIL, /* CAUSE_I4B_NOCHAN -> no circuit/channel available*/
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CAUSE_Q850_INCDEST, /* CAUSE_I4B_INCOMP -> incompatible destination */
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CAUSE_Q850_CALLREJ, /* CAUSE_I4B_REJECT -> call rejected */
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CAUSE_Q850_DSTOOORDR, /* CAUSE_I4B_OOO -> destination out of order */
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CAUSE_Q850_TMPFAIL, /* CAUSE_I4B_TMPFAIL -> temporary failure */
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CAUSE_Q850_USRBSY, /* CAUSE_I4B_L1ERROR -> L1 error / persistent deact XXX */
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CAUSE_Q850_USRBSY, /* CAUSE_I4B_LLDIAL -> no dialout on leased line XXX */
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};
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/*---------------------------------------------------------------------------*
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* setup cr ref flag according to direction
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*---------------------------------------------------------------------------*/
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unsigned char
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setup_cr(call_desc_t *cd, unsigned char cr)
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{
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if(cd->crflag == CRF_ORIG)
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return(cr & 0x7f); /* clear cr ref flag */
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else if(cd->crflag == CRF_DEST)
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return(cr | 0x80); /* set cr ref flag */
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else
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panic("setup_cr: invalid crflag!\n");
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}
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/*---------------------------------------------------------------------------*
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* decode and process a Q.931 message
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*---------------------------------------------------------------------------*/
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void
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i4b_decode_q931(int unit, int msg_len, u_char *msg_ptr)
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{
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call_desc_t *cd;
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int codeset = CODESET_0;
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int old_codeset = CODESET_0;
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int shift_flag = UNSHIFTED;
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int crlen = 0;
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int crval = 0;
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int crflag = 0;
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int i;
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int offset;
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int s;
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/* check protocol discriminator */
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if(*msg_ptr != PD_Q931)
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{
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static int protoflag = -1; /* print only once .. */
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if(*msg_ptr != protoflag)
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{
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NDBGL3(L3_P_ERR, "unknown protocol discriminator 0x%x!", *msg_ptr);
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protoflag = *msg_ptr;
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}
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return;
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}
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msg_ptr++;
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msg_len--;
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s = SPLI4B(); /* this has to be protected ! */
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/* extract call reference */
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crlen = *msg_ptr & CRLENGTH_MASK;
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msg_ptr++;
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msg_len--;
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if(crlen != 0)
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{
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crval += *msg_ptr & 0x7f;
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crflag = (*msg_ptr >> 7) & 0x01;
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msg_ptr++;
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msg_len--;
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for(i=1; i < crlen; i++)
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{
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crval += *msg_ptr;
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msg_ptr++;
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msg_len--;
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}
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}
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else
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{
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crval = 0;
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crflag = 0;
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}
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NDBGL3(L3_P_MSG, "Call Ref, len %d, val %d, flag %d", crlen, crval, crflag);
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/* find or allocate calldescriptor */
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if((cd = cd_by_unitcr(unit, crval,
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crflag == CRF_DEST ? CRF_ORIG : CRF_DEST)) == NULL)
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{
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if(*msg_ptr == SETUP)
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{
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/* get and init new calldescriptor */
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cd = reserve_cd(); /* cdid filled in */
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cd->controller = utoc_tab[unit];
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cd->cr = crval;
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cd->crflag = CRF_DEST; /* we are the dest side */
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cd->ilt = NULL; /* reset link tab ptrs */
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cd->dlt = NULL;
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}
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else
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{
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/*XXX*/ if(crval != 0) /* ignore global call references */
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{
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NDBGL3(L3_P_ERR, "cannot find calldescriptor for cr = 0x%x, crflag = 0x%x, msg = 0x%x, frame = ", crval, crflag, *msg_ptr);
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i4b_print_frame(msg_len, msg_ptr);
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}
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splx(s);
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return;
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}
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}
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splx(s);
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/* decode and handle message type */
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i4b_decode_q931_message(unit, cd, *msg_ptr);
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msg_ptr++;
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msg_len--;
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/* process information elements */
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while(msg_len > 0)
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{
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/* check for shift codeset IE */
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if((*msg_ptr & 0x80) && ((*msg_ptr & 0xf0) == SOIE_SHIFT))
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{
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if(!(*msg_ptr & SHIFT_LOCK))
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shift_flag = SHIFTED;
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old_codeset = codeset;
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codeset = *msg_ptr & CODESET_MASK;
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if((shift_flag != SHIFTED) &&
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(codeset <= old_codeset))
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{
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NDBGL3(L3_P_ERR, "Q.931 lockingshift proc violation, shift %d -> %d", old_codeset, codeset);
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codeset = old_codeset;
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}
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msg_len--;
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msg_ptr++;
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}
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/* process one IE for selected codeset */
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switch(codeset)
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{
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case CODESET_0:
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offset = i4b_decode_q931_cs0_ie(unit, cd, msg_len, msg_ptr);
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msg_len -= offset;
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msg_ptr += offset;
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break;
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default:
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NDBGL3(L3_P_ERR, "unknown codeset %d, ", codeset);
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i4b_print_frame(msg_len, msg_ptr);
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msg_len = 0;
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break;
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}
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/* check for non-locking shifts */
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if(shift_flag == SHIFTED)
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{
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shift_flag = UNSHIFTED;
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codeset = old_codeset;
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}
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}
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next_l3state(cd, cd->event);
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}
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/*---------------------------------------------------------------------------*
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* decode and process one Q.931 codeset 0 information element
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*---------------------------------------------------------------------------*/
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int
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i4b_decode_q931_cs0_ie(int unit, call_desc_t *cd, int msg_len, u_char *msg_ptr)
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{
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int i, j;
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char *p;
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switch(*msg_ptr)
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{
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/*********/
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/* Q.931 */
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/*********/
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/* single byte IE's */
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case IEI_SENDCOMPL:
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NDBGL3(L3_P_MSG, "IEI_SENDCOMPL");
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return(1);
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break;
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/* multi byte IE's */
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case IEI_SEGMMSG: /* segmented message */
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NDBGL3(L3_P_MSG, "IEI_SEGMENTED_MESSAGE");
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break;
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case IEI_BEARERCAP: /* bearer capability */
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switch(msg_ptr[2])
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{
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case 0x80: /* speech */
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case 0x89: /* restricted digital info */
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case 0x90: /* 3.1KHz audio */
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/* XXX */ cd->bprot = BPROT_NONE;
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NDBGL3(L3_P_MSG, "IEI_BEARERCAP - Telephony");
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break;
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case 0x88: /* unrestricted digital info */
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/* XXX */ cd->bprot = BPROT_RHDLC;
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NDBGL3(L3_P_MSG, "IEI_BEARERCAP - Raw HDLC");
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break;
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default:
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/* XXX */ cd->bprot = BPROT_NONE;
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NDBGL3(L3_P_ERR, "IEI_BEARERCAP - Unsupported B-Protocol 0x%x", msg_ptr[2]);
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break;
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}
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break;
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case IEI_CAUSE: /* cause */
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if(msg_ptr[2] & 0x80)
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{
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cd->cause_in = msg_ptr[3] & 0x7f;
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NDBGL3(L3_P_MSG, "IEI_CAUSE = %d", msg_ptr[3] & 0x7f);
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}
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else
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{
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cd->cause_in = msg_ptr[4] & 0x7f;
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NDBGL3(L3_P_MSG, "IEI_CAUSE = %d", msg_ptr[4] & 0x7f);
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}
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break;
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case IEI_CALLID: /* call identity */
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NDBGL3(L3_P_MSG, "IEI_CALL_IDENTITY");
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break;
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case IEI_CALLSTATE: /* call state */
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cd->call_state = msg_ptr[2] & 0x3f;
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NDBGL3(L3_P_MSG, "IEI_CALLSTATE = %d", cd->call_state);
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break;
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case IEI_CHANNELID: /* channel id */
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if((msg_ptr[2] & 0xf4) != 0x80)
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{
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cd->channelid = CHAN_NO;
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NDBGL3(L3_P_ERR, "IEI_CHANNELID, unsupported value 0x%x", msg_ptr[2]);
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}
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else
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{
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switch(msg_ptr[2] & 0x03)
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{
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case IE_CHAN_ID_NO:
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cd->channelid = CHAN_NO;
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break;
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case IE_CHAN_ID_B1:
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cd->channelid = CHAN_B1;
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break;
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case IE_CHAN_ID_B2:
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cd->channelid = CHAN_B2;
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break;
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case IE_CHAN_ID_ANY:
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cd->channelid = CHAN_ANY;
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break;
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}
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cd->channelexcl = (msg_ptr[2] & 0x08) >> 3;
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NDBGL3(L3_P_MSG, "IEI_CHANNELID - channel %d, exclusive = %d", cd->channelid, cd->channelexcl);
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/* if this is a setup message, reserve channel */
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if(cd->event == EV_SETUP)
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{
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if((cd->channelid == CHAN_B1) || (cd->channelid == CHAN_B2))
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{
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if(ctrl_desc[cd->controller].bch_state[cd->channelid] == BCH_ST_FREE)
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ctrl_desc[cd->controller].bch_state[cd->channelid] = BCH_ST_RSVD;
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else
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NDBGL3(L3_P_ERR, "IE ChannelID, Channel NOT free!!");
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}
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else if(cd->channelid == CHAN_NO)
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{
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NDBGL3(L3_P_MSG, "IE ChannelID, SETUP with channel = No channel (CW)");
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}
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else /* cd->channelid == CHAN_ANY */
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{
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NDBGL3(L3_P_ERR, "ERROR: IE ChannelID, SETUP with channel = Any channel!");
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}
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}
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}
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break;
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case IEI_PROGRESSI: /* progress indicator */
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NDBGL3(L3_P_MSG, "IEI_PROGRESSINDICATOR");
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break;
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case IEI_NETSPCFAC: /* network specific fac */
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NDBGL3(L3_P_MSG, "IEI_NETSPCFAC");
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break;
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case IEI_NOTIFIND: /* notification indicator */
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NDBGL3(L3_P_MSG, "IEI_NOTIFICATION_INDICATOR");
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break;
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case IEI_DISPLAY: /* display */
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memcpy(cd->display, &msg_ptr[2], min(DISPLAY_MAX, msg_ptr[1]));
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cd->display[min(DISPLAY_MAX, msg_ptr[1])] = '\0';
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NDBGL3(L3_P_MSG, "IEI_DISPLAY = %s", cd->display);
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break;
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case IEI_DATETIME: /* date/time */
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i = 2;
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j = msg_ptr[1];
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p = &(cd->datetime[0]);
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*p = '\0';
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for(j = msg_ptr[1]; j > 0; j--, i++)
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sprintf(p+strlen(p), "%02d", msg_ptr[i]);
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NDBGL3(L3_P_MSG, "IEI_DATETIME = %s", cd->datetime);
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break;
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case IEI_KEYPAD: /* keypad facility */
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NDBGL3(L3_P_MSG, "IEI_KEYPAD_FACILITY");
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break;
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case IEI_SIGNAL: /* signal type */
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NDBGL3(L3_P_MSG, "IEI_SIGNAL = %d", msg_ptr[2]);
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break;
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case IEI_INFRATE: /* information rate */
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NDBGL3(L3_P_MSG, "IEI_INFORMATION_RATE");
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break;
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case IEI_ETETDEL: /* end to end transit delay */
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NDBGL3(L3_P_MSG, "IEI_END_TO_END_TRANSIT_DELAY");
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break;
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case IEI_CUG: /* closed user group */
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NDBGL3(L3_P_MSG, "IEI_CLOSED_USER_GROUP");
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break;
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case IEI_CALLINGPN: /* calling party no */
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if(msg_ptr[2] & 0x80) /* no presentation/screening indicator ? */
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{
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memcpy(cd->src_telno, &msg_ptr[3], min(TELNO_MAX, msg_ptr[1]-1));
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cd->src_telno[min(TELNO_MAX, msg_ptr[1] - 1)] = '\0';
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cd->scr_ind = SCR_NONE;
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cd->prs_ind = PRS_NONE;
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}
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else
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{
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memcpy(cd->src_telno, &msg_ptr[4], min(TELNO_MAX, msg_ptr[1]-2));
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cd->src_telno[min(TELNO_MAX, msg_ptr[1] - 2)] = '\0';
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cd->scr_ind = (msg_ptr[3] & 0x03) + SCR_USR_NOSC;
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cd->prs_ind = ((msg_ptr[3] >> 5) & 0x03) + PRS_ALLOWED;
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}
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NDBGL3(L3_P_MSG, "IEI_CALLINGPN = %s", cd->src_telno);
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break;
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case IEI_CALLINGPS: /* calling party subaddress */
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NDBGL3(L3_P_MSG, "IEI_CALLINGPS");
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break;
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case IEI_CALLEDPN: /* called party number */
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memcpy(cd->dst_telno, &msg_ptr[3], min(TELNO_MAX, msg_ptr[1]-1));
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cd->dst_telno[min(TELNO_MAX, msg_ptr [1] - 1)] = '\0';
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NDBGL3(L3_P_MSG, "IEI_CALLED = %s", cd->dst_telno);
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break;
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case IEI_CALLEDPS: /* called party subaddress */
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NDBGL3(L3_P_MSG, "IEI_CALLEDPS");
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break;
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case IEI_REDIRNO: /* redirecting number */
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NDBGL3(L3_P_MSG, "IEI_REDIRECTING_NUMBER");
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break;
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case IEI_TRNSEL: /* transit network selection */
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NDBGL3(L3_P_MSG, "IEI_TRANSIT_NETWORK_SELECTION");
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break;
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case IEI_RESTARTI: /* restart indicator */
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NDBGL3(L3_P_MSG, "IEI_RESTART_INDICATOR");
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break;
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case IEI_LLCOMPAT: /* low layer compat */
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NDBGL3(L3_P_MSG, "IEI_LLCOMPAT");
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break;
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case IEI_HLCOMPAT: /* high layer compat */
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NDBGL3(L3_P_MSG, "IEI_HLCOMPAT");
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break;
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case IEI_USERUSER: /* user-user */
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NDBGL3(L3_P_MSG, "IEI_USER_USER");
|
|
break;
|
|
|
|
case IEI_ESCAPE: /* escape for extension */
|
|
NDBGL3(L3_P_MSG, "IEI_ESCAPE");
|
|
break;
|
|
|
|
/*********/
|
|
/* Q.932 */
|
|
/*********/
|
|
case IEI_FACILITY: /* facility */
|
|
NDBGL3(L3_P_MSG, "IEI_FACILITY");
|
|
if(i4b_aoc(msg_ptr, cd) > -1)
|
|
i4b_l4_charging_ind(cd);
|
|
break;
|
|
|
|
/*********/
|
|
/* Q.95x */
|
|
/*********/
|
|
case IEI_CONCTDNO: /* connected number */
|
|
NDBGL3(L3_P_MSG, "IEI_CONCTDNO");
|
|
break;
|
|
|
|
|
|
default:
|
|
NDBGL3(L3_P_ERR, "Unknown IE %d - ", *msg_ptr);
|
|
i4b_print_frame(msg_ptr[1]+2, msg_ptr);
|
|
break;
|
|
}
|
|
return(msg_ptr[1] + 2);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* decode and process one Q.931 codeset 0 information element
|
|
*---------------------------------------------------------------------------*/
|
|
void
|
|
i4b_decode_q931_message(int unit, call_desc_t *cd, u_char message_type)
|
|
{
|
|
char *m = NULL;
|
|
|
|
cd->event = EV_ILL;
|
|
|
|
switch(message_type)
|
|
{
|
|
/* call establishment */
|
|
|
|
case ALERT:
|
|
cd->event = EV_ALERT;
|
|
m = "ALERT";
|
|
break;
|
|
|
|
case CALL_PROCEEDING:
|
|
cd->event = EV_CALLPRC;
|
|
m = "CALL_PROCEEDING";
|
|
break;
|
|
|
|
case PROGRESS:
|
|
cd->event = EV_PROGIND;
|
|
m = "PROGRESS";
|
|
break;
|
|
|
|
case SETUP:
|
|
m = "SETUP";
|
|
cd->bprot = BPROT_NONE;
|
|
cd->cause_in = 0;
|
|
cd->cause_out = 0;
|
|
cd->dst_telno[0] = '\0';
|
|
cd->src_telno[0] = '\0';
|
|
cd->channelid = CHAN_NO;
|
|
cd->channelexcl = 0;
|
|
cd->display[0] = '\0';
|
|
cd->datetime[0] = '\0';
|
|
cd->event = EV_SETUP;
|
|
break;
|
|
|
|
case CONNECT:
|
|
m = "CONNECT";
|
|
cd->datetime[0] = '\0';
|
|
cd->event = EV_CONNECT;
|
|
break;
|
|
|
|
case SETUP_ACKNOWLEDGE:
|
|
m = "SETUP_ACKNOWLEDGE";
|
|
cd->event = EV_SETUPAK;
|
|
break;
|
|
|
|
case CONNECT_ACKNOWLEDGE:
|
|
m = "CONNECT_ACKNOWLEDGE";
|
|
cd->event = EV_CONACK;
|
|
break;
|
|
|
|
/* call information */
|
|
|
|
case USER_INFORMATION:
|
|
m = "USER_INFORMATION";
|
|
break;
|
|
|
|
case SUSPEND_REJECT:
|
|
m = "SUSPEND_REJECT";
|
|
break;
|
|
|
|
case RESUME_REJECT:
|
|
m = "RESUME_REJECT";
|
|
break;
|
|
|
|
case HOLD:
|
|
m = "HOLD";
|
|
break;
|
|
|
|
case SUSPEND:
|
|
m = "SUSPEND";
|
|
break;
|
|
|
|
case RESUME:
|
|
m = "RESUME";
|
|
break;
|
|
|
|
case HOLD_ACKNOWLEDGE:
|
|
m = "HOLD_ACKNOWLEDGE";
|
|
break;
|
|
|
|
case SUSPEND_ACKNOWLEDGE:
|
|
m = "SUSPEND_ACKNOWLEDGE";
|
|
break;
|
|
|
|
case RESUME_ACKNOWLEDGE:
|
|
m = "RESUME_ACKNOWLEDGE";
|
|
break;
|
|
|
|
case HOLD_REJECT:
|
|
m = "HOLD_REJECT";
|
|
break;
|
|
|
|
case RETRIEVE:
|
|
m = "RETRIEVE";
|
|
break;
|
|
|
|
case RETRIEVE_ACKNOWLEDGE:
|
|
m = "RETRIEVE_ACKNOWLEDGE";
|
|
break;
|
|
|
|
case RETRIEVE_REJECT:
|
|
m = "RETRIEVE_REJECT";
|
|
break;
|
|
|
|
/* call clearing */
|
|
|
|
case DISCONNECT:
|
|
m = "DISCONNECT";
|
|
cd->event = EV_DISCONN;
|
|
break;
|
|
|
|
case RESTART:
|
|
m = "RESTART";
|
|
break;
|
|
|
|
case RELEASE:
|
|
m = "RELEASE";
|
|
cd->event = EV_RELEASE;
|
|
break;
|
|
|
|
case RESTART_ACKNOWLEDGE:
|
|
m = "RESTART_ACKNOWLEDGE";
|
|
break;
|
|
|
|
case RELEASE_COMPLETE:
|
|
m = "RELEASE_COMPLETE";
|
|
cd->event = EV_RELCOMP;
|
|
break;
|
|
|
|
/* misc messages */
|
|
|
|
case SEGMENT:
|
|
m = "SEGMENT";
|
|
break;
|
|
|
|
case FACILITY:
|
|
m = "FACILITY";
|
|
cd->event = EV_FACILITY;
|
|
break;
|
|
|
|
case REGISTER:
|
|
m = "REGISTER";
|
|
break;
|
|
|
|
case NOTIFY:
|
|
m = "NOTIFY";
|
|
break;
|
|
|
|
case STATUS_ENQUIRY:
|
|
m = "STATUS_ENQUIRY";
|
|
cd->event = EV_STATENQ;
|
|
break;
|
|
|
|
case CONGESTION_CONTROL:
|
|
m = "CONGESTION_CONTROL";
|
|
break;
|
|
|
|
case INFORMATION:
|
|
m = "INFORMATION";
|
|
cd->event = EV_INFO;
|
|
break;
|
|
|
|
case STATUS:
|
|
m = "STATUS";
|
|
cd->event = EV_STATUS;
|
|
break;
|
|
|
|
default:
|
|
NDBGL3(L3_P_ERR, "unit %d, cr = 0x%02x, msg = 0x%02x", unit, cd->cr, message_type);
|
|
break;
|
|
}
|
|
if(m)
|
|
{
|
|
NDBGL3(L3_PRIM, "%s: unit %d, cr = 0x%02x\n", m, unit, cd->cr);
|
|
}
|
|
}
|
|
|
|
#endif /* NI4BQ931 > 0 */
|