676 lines
18 KiB
C
676 lines
18 KiB
C
/*
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* Copyright (c) 1997, 2002 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_l2if.c - Layer 3 interface to Layer 2
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* -------------------------------------------
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*
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* $FreeBSD$
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*
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* last edit-date: [Tue Mar 26 15:03:59 2002]
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*
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*---------------------------------------------------------------------------*/
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#include "i4bq931.h"
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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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#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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#include <i4b/include/i4b_isdnq931.h>
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#include <i4b/include/i4b_l2l3.h>
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#include <i4b/include/i4b_l3l4.h>
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#include <i4b/include/i4b_mbuf.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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static unsigned char make_q931_cause(cause_t cause);
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/*---------------------------------------------------------------------------*
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* this converts our internal state (number) to the number specified
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* in Q.931 and is used for reporting our state in STATUS messages.
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*---------------------------------------------------------------------------*/
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int i4b_status_tab[] = {
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0, /* ST_U0, */
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1, /* ST_U1, */
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3, /* ST_U3, */
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4, /* ST_U4, */
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6, /* ST_U6, */
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7, /* ST_U7, */
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8, /* ST_U8, */
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9, /* ST_U9, */
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10, /* ST_U10, */
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11, /* ST_U11, */
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12, /* ST_U12, */
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19, /* ST_U19, */
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6, /* ST_IWA, */
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6, /* ST_IWR, */
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1, /* ST_OW, */
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6, /* ST_IWL, */
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};
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/*---------------------------------------------------------------------------*
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* return a valid q.931/q.850 cause from any of the internal causes
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*---------------------------------------------------------------------------*/
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static unsigned char
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make_q931_cause(cause_t cause)
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{
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register unsigned char ret;
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switch(GET_CAUSE_TYPE(cause))
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{
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case CAUSET_Q850:
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ret = GET_CAUSE_VAL(cause);
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break;
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case CAUSET_I4B:
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ret = cause_tab_q931[GET_CAUSE_VAL(cause)];
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break;
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default:
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panic("make_q931_cause: unknown cause type!");
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break;
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}
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ret |= EXT_LAST;
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return(ret);
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}
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/*---------------------------------------------------------------------------*
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* return status of data link
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*---------------------------------------------------------------------------*/
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int
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i4b_get_dl_stat(call_desc_t *cd)
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{
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return(ctrl_desc[cd->controller].dl_est);
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}
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/*---------------------------------------------------------------------------*
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* DL ESTABLISH INDICATION from Layer 2
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*---------------------------------------------------------------------------*/
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int
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i4b_dl_establish_ind(int unit)
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{
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int i;
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int found = 0;
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NDBGL2(L2_PRIM, "DL-ESTABLISH-IND unit %d",unit);
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/* first set DL up in controller descriptor */
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for(i=0; i < nctrl; i++)
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{
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if((ctrl_desc[i].ctrl_type == CTRL_PASSIVE) &&
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(ctrl_desc[i].unit == unit))
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{
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NDBGL3(L3_MSG, "unit=%d DL established!",unit);
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ctrl_desc[i].dl_est = DL_UP;
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found = 1;
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}
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}
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if(found == 0)
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{
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NDBGL3(L3_ERR, "ERROR, controller not found for unit=%d!",unit);
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return(-1);
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}
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found = 0;
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/* second, inform all (!) active call of the event */
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for(i=0; i < N_CALL_DESC; i++)
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{
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if( (call_desc[i].cdid != 0) &&
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(ctrl_desc[call_desc[i].controller].ctrl_type == CTRL_PASSIVE) &&
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(ctrl_desc[call_desc[i].controller].unit == unit))
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{
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NDBGL3(L3_MSG, "unit=%d, index=%d cdid=%u cr=%d",
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unit, i, call_desc[i].cdid, call_desc[i].cr);
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next_l3state(&call_desc[i], EV_DLESTIN);
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found++;
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}
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}
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if(found == 0)
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{
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NDBGL3(L3_ERR, "ERROR, no cdid for unit %d found!", unit);
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return(-1);
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}
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else
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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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* DL ESTABLISH CONFIRM from Layer 2
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*---------------------------------------------------------------------------*/
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int
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i4b_dl_establish_cnf(int unit)
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{
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int i;
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int found = 0;
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NDBGL2(L2_PRIM, "DL-ESTABLISH-CONF unit %d",unit);
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for(i=0; i < N_CALL_DESC; i++)
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{
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if( (call_desc[i].cdid != 0) &&
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(ctrl_desc[call_desc[i].controller].ctrl_type == CTRL_PASSIVE) &&
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(ctrl_desc[call_desc[i].controller].unit == unit))
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{
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ctrl_desc[call_desc[i].controller].dl_est = DL_UP;
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NDBGL3(L3_MSG, "unit=%d, index=%d cdid=%u cr=%d",
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unit, i, call_desc[i].cdid, call_desc[i].cr);
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next_l3state(&call_desc[i], EV_DLESTCF);
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found++;
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}
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}
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if(found == 0)
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{
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NDBGL3(L3_ERR, "ERROR, no cdid for unit %d found!", unit);
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return(-1);
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}
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else
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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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* DL RELEASE INDICATION from Layer 2
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*---------------------------------------------------------------------------*/
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int
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i4b_dl_release_ind(int unit)
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{
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int i;
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int found = 0;
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NDBGL2(L2_PRIM, "DL-RELEASE-IND unit %d",unit);
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/* first set controller to down */
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for(i=0; i < nctrl; i++)
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{
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if((ctrl_desc[i].ctrl_type == CTRL_PASSIVE) &&
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(ctrl_desc[i].unit == unit))
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{
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NDBGL3(L3_MSG, "unit=%d DL released!",unit);
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ctrl_desc[i].dl_est = DL_DOWN;
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found = 1;
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}
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}
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if(found == 0)
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{
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NDBGL3(L3_ERR, "ERROR, controller not found for unit=%d!",unit);
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return(-1);
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}
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found = 0;
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/* second, inform all (!) active calls of the event */
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for(i=0; i < N_CALL_DESC; i++)
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{
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if( (call_desc[i].cdid != 0) &&
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(ctrl_desc[call_desc[i].controller].ctrl_type == CTRL_PASSIVE) &&
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(ctrl_desc[call_desc[i].controller].unit == unit))
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{
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NDBGL3(L3_MSG, "unit=%d, index=%d cdid=%u cr=%d",
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unit, i, call_desc[i].cdid, call_desc[i].cr);
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next_l3state(&call_desc[i], EV_DLRELIN);
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found++;
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}
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}
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if(found == 0)
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{
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/* this is not an error since it might be a normal call end */
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NDBGL3(L3_MSG, "no cdid for unit %d found", unit);
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}
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return(0);
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}
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/*---------------------------------------------------------------------------*
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* DL RELEASE CONFIRM from Layer 2
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*---------------------------------------------------------------------------*/
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int
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i4b_dl_release_cnf(int unit)
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{
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int i;
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NDBGL2(L2_PRIM, "DL-RELEASE-CONF unit %d",unit);
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for(i=0; i < nctrl; i++)
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{
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if((ctrl_desc[i].ctrl_type == CTRL_PASSIVE) &&
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(ctrl_desc[i].unit == unit))
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{
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NDBGL3(L3_MSG, "unit=%d DL released!",unit);
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ctrl_desc[i].dl_est = DL_DOWN;
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return(0);
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}
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}
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NDBGL3(L3_ERR, "ERROR, controller not found for unit=%d!",unit);
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return(-1);
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}
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/*---------------------------------------------------------------------------*
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* i4b_dl_data_ind - process a rx'd I-frame got from layer 2
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*---------------------------------------------------------------------------*/
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int
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i4b_dl_data_ind(int unit, struct mbuf *m)
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{
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#ifdef NOTDEF
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NDBGL2(L2_PRIM, "DL-DATA-IND unit %d",unit);
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#endif
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i4b_decode_q931(unit, m->m_len, m->m_data);
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i4b_Dfreembuf(m);
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return(0);
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}
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/*---------------------------------------------------------------------------*
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* dl_unit_data_ind - process a rx'd U-frame got from layer 2
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*---------------------------------------------------------------------------*/
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int
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i4b_dl_unit_data_ind(int unit, struct mbuf *m)
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{
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#ifdef NOTDEF
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NDBGL2(L2_PRIM, "DL-UNIT-DATA-IND unit %d",unit);
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#endif
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i4b_decode_q931(unit, m->m_len, m->m_data);
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i4b_Dfreembuf(m);
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return(0);
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}
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/*---------------------------------------------------------------------------*
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* send CONNECT message
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*---------------------------------------------------------------------------*/
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void
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i4b_l3_tx_connect(call_desc_t *cd)
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{
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struct mbuf *m;
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u_char *ptr;
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NDBGL3(L3_PRIM, "unit %d, cr = 0x%02x", ctrl_desc[cd->controller].unit, cd->cr);
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if((m = i4b_Dgetmbuf(I_FRAME_HDRLEN + MSG_CONNECT_LEN)) == NULL)
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panic("i4b_l3_tx_connect: can't allocate mbuf\n");
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ptr = m->m_data + I_FRAME_HDRLEN;
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*ptr++ = PD_Q931; /* protocol discriminator */
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*ptr++ = 0x01; /* call reference length */
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*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
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*ptr++ = CONNECT; /* message type = connect */
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DL_Data_Req(ctrl_desc[cd->controller].unit, m);
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}
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/*---------------------------------------------------------------------------*
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* send RELEASE COMPLETE message
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*---------------------------------------------------------------------------*/
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void
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i4b_l3_tx_release_complete(call_desc_t *cd, int send_cause_flag)
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{
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struct mbuf *m;
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u_char *ptr;
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int len = I_FRAME_HDRLEN + MSG_RELEASE_COMPLETE_LEN;
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if(send_cause_flag == 0)
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{
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len -= 4;
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NDBGL3(L3_PRIM, "unit %d, cr = 0x%02x",
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ctrl_desc[cd->controller].unit, cd->cr);
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}
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else
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{
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NDBGL3(L3_PRIM, "unit=%d, cr=0x%02x, cause=0x%x",
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ctrl_desc[cd->controller].unit, cd->cr, cd->cause_out);
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}
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if((m = i4b_Dgetmbuf(len)) == NULL)
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panic("i4b_l3_tx_release_complete: can't allocate mbuf\n");
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ptr = m->m_data + I_FRAME_HDRLEN;
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*ptr++ = PD_Q931; /* protocol discriminator */
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*ptr++ = 0x01; /* call reference length */
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*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
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*ptr++ = RELEASE_COMPLETE; /* message type = release complete */
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if(send_cause_flag)
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{
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*ptr++ = IEI_CAUSE; /* cause ie */
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*ptr++ = CAUSE_LEN;
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*ptr++ = CAUSE_STD_LOC_OUT;
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*ptr++ = make_q931_cause(cd->cause_out);
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}
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DL_Data_Req(ctrl_desc[cd->controller].unit, m);
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}
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/*---------------------------------------------------------------------------*
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* send DISCONNECT message
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*---------------------------------------------------------------------------*/
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void
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i4b_l3_tx_disconnect(call_desc_t *cd)
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{
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struct mbuf *m;
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u_char *ptr;
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NDBGL3(L3_PRIM, "unit %d, cr = 0x%02x", ctrl_desc[cd->controller].unit, cd->cr);
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if((m = i4b_Dgetmbuf(I_FRAME_HDRLEN + MSG_DISCONNECT_LEN)) == NULL)
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panic("i4b_l3_tx_disconnect: can't allocate mbuf\n");
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ptr = m->m_data + I_FRAME_HDRLEN;
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*ptr++ = PD_Q931; /* protocol discriminator */
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*ptr++ = 0x01; /* call ref length */
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*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
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*ptr++ = DISCONNECT; /* message type = disconnect */
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*ptr++ = IEI_CAUSE; /* cause ie */
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*ptr++ = CAUSE_LEN;
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*ptr++ = CAUSE_STD_LOC_OUT;
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*ptr++ = make_q931_cause(cd->cause_out);
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DL_Data_Req(ctrl_desc[cd->controller].unit, m);
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}
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/*---------------------------------------------------------------------------*
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* send SETUP message
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*---------------------------------------------------------------------------*/
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void
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i4b_l3_tx_setup(call_desc_t *cd)
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{
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struct mbuf *m;
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u_char *ptr;
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int len;
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int slen = strlen(cd->src_telno);
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int sslen = strlen(cd->src_subaddr);
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int dlen = strlen(cd->dst_telno);
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int dslen = strlen(cd->dst_subaddr);
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int klen = strlen(cd->keypad);
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/*
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* there is one additional octet if cd->bprot == BPROT_NONE
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* NOTE: the selection of a bearer capability by a B L1
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* protocol is highly questionable and a better
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* mechanism should be used in future. (-hm)
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*/
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NDBGL3(L3_PRIM, "unit %d, cr = 0x%02x", ctrl_desc[cd->controller].unit, cd->cr);
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len = I_FRAME_HDRLEN +
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MSG_SETUP_LEN +
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(slen ? (3+slen) : 0) +
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(sslen ? (3+sslen) : 0) +
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(dlen ? (3+dlen) : 0) +
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(dslen ? (3+dslen) : 0) +
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(klen ? (2+klen) : 0) +
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(cd->bprot == BPROT_NONE ? 1 : 0);
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if((m = i4b_Dgetmbuf(len)) == NULL)
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{
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panic("i4b_l3_tx_setup: can't allocate mbuf\n");
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}
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cd->crflag = CRF_ORIG; /* we are the originating side */
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ptr = m->m_data + I_FRAME_HDRLEN;
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*ptr++ = PD_Q931; /* protocol discriminator */
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*ptr++ = 0x01; /* call ref length */
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*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
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*ptr++ = SETUP; /* message type = setup */
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*ptr++ = IEI_SENDCOMPL; /* sending complete */
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*ptr++ = IEI_BEARERCAP; /* bearer capability */
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/* XXX
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* currently i have no idea if this should be switched by
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* the choosen B channel protocol or if there should be a
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* separate configuration item for the bearer capability.
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* For now, it is switched by the choosen b protocol (-hm)
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*/
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switch(cd->bprot)
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{
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case BPROT_NONE: /* telephony */
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*ptr++ = IEI_BEARERCAP_LEN+1;
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*ptr++ = IT_CAP_SPEECH;
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*ptr++ = IT_RATE_64K;
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*ptr++ = IT_UL1_G711A;
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break;
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case BPROT_RHDLC: /* raw HDLC */
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*ptr++ = IEI_BEARERCAP_LEN;
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*ptr++ = IT_CAP_UNR_DIG_INFO;
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*ptr++ = IT_RATE_64K;
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break;
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default:
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*ptr++ = IEI_BEARERCAP_LEN;
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*ptr++ = IT_CAP_UNR_DIG_INFO;
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*ptr++ = IT_RATE_64K;
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break;
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}
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*ptr++ = IEI_CHANNELID; /* channel id */
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*ptr++ = IEI_CHANNELID_LEN; /* channel id length */
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switch(cd->channelid)
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{
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case CHAN_B1:
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*ptr++ = CHANNELID_B1;
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break;
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case CHAN_B2:
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*ptr++ = CHANNELID_B2;
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break;
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default:
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*ptr++ = CHANNELID_ANY;
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break;
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}
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if(klen)
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{
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*ptr++ = IEI_KEYPAD; /* keypad facility */
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*ptr++ = klen; /* keypad facility length */
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strncpy(ptr, cd->keypad, klen);
|
|
ptr += klen;
|
|
}
|
|
|
|
if(slen)
|
|
{
|
|
*ptr++ = IEI_CALLINGPN; /* calling party no */
|
|
*ptr++ = IEI_CALLINGPN_LEN+slen;/* calling party no length */
|
|
*ptr++ = NUMBER_TYPEPLAN; /* type of number, number plan id */
|
|
strncpy(ptr, cd->src_telno, slen);
|
|
ptr += slen;
|
|
}
|
|
|
|
if(sslen)
|
|
{
|
|
*ptr++ = IEI_CALLINGPS; /* calling subaddr */
|
|
*ptr++ = IEI_CALLINGPS_LEN+sslen; /* calling subaddr len */
|
|
*ptr++ = SUBADDR_TYPE_NSAP; /* type = NSAP */
|
|
strncpy(ptr, cd->src_subaddr, sslen);
|
|
ptr += sslen;
|
|
}
|
|
|
|
if(dlen)
|
|
{
|
|
*ptr++ = IEI_CALLEDPN; /* called party no */
|
|
*ptr++ = IEI_CALLEDPN_LEN+dlen; /* called party no length */
|
|
*ptr++ = NUMBER_TYPEPLAN; /* type of number, number plan id */
|
|
strncpy(ptr, cd->dst_telno, dlen);
|
|
ptr += dlen;
|
|
}
|
|
|
|
if(dslen)
|
|
{
|
|
*ptr++ = IEI_CALLEDPS; /* calling party subaddr */
|
|
*ptr++ = IEI_CALLEDPS_LEN+dslen;/* calling party subaddr len */
|
|
*ptr++ = SUBADDR_TYPE_NSAP; /* type = NSAP */
|
|
strncpy(ptr, cd->dst_subaddr, dslen);
|
|
ptr += dslen;
|
|
}
|
|
|
|
DL_Data_Req(ctrl_desc[cd->controller].unit, m);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* send CONNECT ACKNOWLEDGE message
|
|
*---------------------------------------------------------------------------*/
|
|
void
|
|
i4b_l3_tx_connect_ack(call_desc_t *cd)
|
|
{
|
|
struct mbuf *m;
|
|
u_char *ptr;
|
|
|
|
NDBGL3(L3_PRIM, "unit %d, cr = 0x%02x", ctrl_desc[cd->controller].unit, cd->cr);
|
|
|
|
if((m = i4b_Dgetmbuf(I_FRAME_HDRLEN + MSG_CONNECT_ACK_LEN)) == NULL)
|
|
panic("i4b_l3_tx_connect_ack: can't allocate mbuf\n");
|
|
|
|
ptr = m->m_data + I_FRAME_HDRLEN;
|
|
|
|
*ptr++ = PD_Q931; /* protocol discriminator */
|
|
*ptr++ = 0x01; /* call reference length */
|
|
*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
|
|
*ptr++ = CONNECT_ACKNOWLEDGE; /* message type = connect ack */
|
|
|
|
DL_Data_Req(ctrl_desc[cd->controller].unit, m);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* send STATUS message
|
|
*---------------------------------------------------------------------------*/
|
|
void
|
|
i4b_l3_tx_status(call_desc_t *cd, u_char q850cause)
|
|
{
|
|
struct mbuf *m;
|
|
u_char *ptr;
|
|
|
|
NDBGL3(L3_PRIM, "unit %d, cr = 0x%02x", ctrl_desc[cd->controller].unit, cd->cr);
|
|
|
|
if((m = i4b_Dgetmbuf(I_FRAME_HDRLEN + MSG_STATUS_LEN)) == NULL)
|
|
panic("i4b_l3_tx_status: can't allocate mbuf\n");
|
|
|
|
ptr = m->m_data + I_FRAME_HDRLEN;
|
|
|
|
*ptr++ = PD_Q931; /* protocol discriminator */
|
|
*ptr++ = 0x01; /* call reference length */
|
|
*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
|
|
*ptr++ = STATUS; /* message type = connect ack */
|
|
|
|
*ptr++ = IEI_CAUSE; /* cause ie */
|
|
*ptr++ = CAUSE_LEN;
|
|
*ptr++ = CAUSE_STD_LOC_OUT;
|
|
*ptr++ = q850cause | EXT_LAST;
|
|
|
|
*ptr++ = IEI_CALLSTATE; /* call state ie */
|
|
*ptr++ = CALLSTATE_LEN;
|
|
*ptr++ = i4b_status_tab[cd->Q931state];
|
|
|
|
DL_Data_Req(ctrl_desc[cd->controller].unit, m);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* send RELEASE message
|
|
*---------------------------------------------------------------------------*/
|
|
void
|
|
i4b_l3_tx_release(call_desc_t *cd, int send_cause_flag)
|
|
{
|
|
struct mbuf *m;
|
|
u_char *ptr;
|
|
int len = I_FRAME_HDRLEN + MSG_RELEASE_LEN;
|
|
|
|
NDBGL3(L3_PRIM, "unit %d, cr = 0x%02x", ctrl_desc[cd->controller].unit, cd->cr);
|
|
|
|
if(send_cause_flag == 0)
|
|
len -= 4;
|
|
|
|
if((m = i4b_Dgetmbuf(len)) == NULL)
|
|
panic("i4b_l3_tx_release: can't allocate mbuf\n");
|
|
|
|
ptr = m->m_data + I_FRAME_HDRLEN;
|
|
|
|
*ptr++ = PD_Q931; /* protocol discriminator */
|
|
*ptr++ = 0x01; /* call reference length */
|
|
*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
|
|
*ptr++ = RELEASE; /* message type = release complete */
|
|
|
|
if(send_cause_flag)
|
|
{
|
|
*ptr++ = IEI_CAUSE; /* cause ie */
|
|
*ptr++ = CAUSE_LEN;
|
|
*ptr++ = CAUSE_STD_LOC_OUT;
|
|
*ptr++ = make_q931_cause(cd->cause_out);
|
|
}
|
|
|
|
DL_Data_Req(ctrl_desc[cd->controller].unit, m);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* send ALERTING message
|
|
*---------------------------------------------------------------------------*/
|
|
void
|
|
i4b_l3_tx_alert(call_desc_t *cd)
|
|
{
|
|
struct mbuf *m;
|
|
u_char *ptr;
|
|
|
|
if((m = i4b_Dgetmbuf(I_FRAME_HDRLEN + MSG_ALERT_LEN)) == NULL)
|
|
panic("i4b_l3_tx_alert: can't allocate mbuf\n");
|
|
|
|
NDBGL3(L3_PRIM, "unit %d, cr = 0x%02x", ctrl_desc[cd->controller].unit, cd->cr);
|
|
|
|
ptr = m->m_data + I_FRAME_HDRLEN;
|
|
|
|
*ptr++ = PD_Q931; /* protocol discriminator */
|
|
*ptr++ = 0x01; /* call reference length */
|
|
*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
|
|
*ptr++ = ALERT; /* message type = alert */
|
|
|
|
DL_Data_Req(ctrl_desc[cd->controller].unit, m);
|
|
}
|
|
|
|
#endif /* NI4BQ931 > 0 */
|