19c749625f
ISDN4BSD is the work of our brand-new comitter: Hellmuth Michaelis, who has done a tremendous amount of work to bring us this far. There are still some outstanding issues and files to bring into the tree, and for now it will be needed to pick up all the extra docs from the isdn4bsd release. It is probably also a very good idea to subscribe to the isdn@freebsd.org mailing list before you try this out. These files correspond to release "beta Version 0.70.00 / December 1998" from Hellmuth.
643 lines
18 KiB
C
643 lines
18 KiB
C
/*
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* Copyright (c) 1997, 1998 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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* $Id: i4b_l2if.c,v 1.14 1998/12/05 18:05:28 hm Exp $
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*
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* last edit-date: [Sat Dec 5 18:31:26 1998]
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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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#if defined(__FreeBSD__) && __FreeBSD__ >= 3
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#include <sys/ioccom.h>
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#else
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#include <sys/ioctl.h>
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#endif
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <net/if.h>
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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_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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#include <i4b/layer4/i4b_l4.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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DBGL2(L2_PRIM, "DL-ESTABLISH-IND", ("unit %d\n",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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DBGL3(L3_MSG, "i4b_dl_establish_ind", ("unit=%d DL established!\n",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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DBGL3(L3_ERR, "i4b_dl_establish_ind", ("ERROR, controller not found for unit=%d!\n",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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DBGL3(L3_MSG, "i4b_dl_establish_ind", ("unit=%d, index=%d cdid=%u cr=%d\n",
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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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DBGL3(L3_ERR, "i4b_dl_establish_ind", ("ERROR, no cdid for unit %d found!\n", 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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DBGL2(L2_PRIM, "DL-ESTABLISH-CONF", ("unit %d\n",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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DBGL3(L3_MSG, "i4b_dl_establish_cnf", ("unit=%d, index=%d cdid=%u cr=%d\n",
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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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DBGL3(L3_ERR, "i4b_dl_establish_cnf", ("ERROR, no cdid for unit %d found!\n", 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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DBGL2(L2_PRIM, "DL-RELEASE-IND", ("unit %d\n",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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DBGL3(L3_MSG, "i4b_dl_release_ind", ("unit=%d DL released!\n",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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DBGL3(L3_ERR, "i4b_dl_release_ind", ("ERROR, controller not found for unit=%d!\n",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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DBGL3(L3_MSG, "i4b_dl_release_ind", ("unit=%d, index=%d cdid=%u cr=%d\n",
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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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DBGL3(L3_MSG, "i4b_dl_release_ind", ("no cdid for unit %d found\n", 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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DBGL2(L2_PRIM, "DL-RELEASE-CONF", ("unit %d\n",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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DBGL3(L3_MSG, "i4b_dl_release_cnf", ("unit=%d DL released!\n",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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DBGL3(L3_ERR, "i4b_dl_release_cnf", ("ERROR, controller not found for unit=%d!\n",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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DBGL2(L2_PRIM, "DL-DATA-IND", ("unit %d\n",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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DBGL2(L2_PRIM, "DL-UNIT-DATA-IND", ("unit %d\n",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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DBGL3(L3_PRIM, "tx CONNECT", ("unit %d, cr = 0x%02x\n", 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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DBGL3(L3_PRIM, "tx RELEASE-COMPLETE", ("unit %d, cr = 0x%02x\n", ctrl_desc[cd->controller].unit, cd->cr));
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if(send_cause_flag == 0)
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len -= 4;
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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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DBGL3(L3_PRIM, "tx DISCONNECT", ("unit %d, cr = 0x%02x\n", 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 slen = strlen(cd->src_telno);
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int dlen = strlen(cd->dst_telno);
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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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DBGL3(L3_PRIM, "tx SETUP", ("unit %d, cr = 0x%02x\n", ctrl_desc[cd->controller].unit, cd->cr));
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if((m = i4b_Dgetmbuf(I_FRAME_HDRLEN + MSG_SETUP_LEN + slen + dlen +
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(cd->bprot == BPROT_NONE ? 1 : 0))) == 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;
|
|
break;
|
|
}
|
|
|
|
*ptr++ = IEI_CHANNELID; /* channel id */
|
|
*ptr++ = IEI_CHANNELID_LEN; /* channel id length */
|
|
|
|
switch(cd->channelid)
|
|
{
|
|
case CHAN_B1:
|
|
*ptr++ = CHANNELID_B1;
|
|
break;
|
|
case CHAN_B2:
|
|
*ptr++ = CHANNELID_B2;
|
|
break;
|
|
default:
|
|
*ptr++ = CHANNELID_ANY;
|
|
break;
|
|
}
|
|
|
|
*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;
|
|
|
|
*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;
|
|
|
|
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;
|
|
|
|
DBGL3(L3_PRIM, "tx CONNECT-ACK", ("unit %d, cr = 0x%02x\n", 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;
|
|
|
|
DBGL3(L3_PRIM, "tx STATUS", ("unit %d, cr = 0x%02x\n", 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;
|
|
|
|
*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;
|
|
|
|
DBGL3(L3_PRIM, "tx RELEASE", ("unit %d, cr = 0x%02x\n", 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");
|
|
|
|
DBGL3(L3_PRIM, "tx ALERT", ("unit %d, cr = 0x%02x\n", 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 */
|