347 lines
9.4 KiB
C
347 lines
9.4 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_l4if.c - Layer 3 interface to Layer 4
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* -------------------------------------------
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*
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* $Id: i4b_l4if.c,v 1.3 2001/11/13 01:06:22 lukem Exp $
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*
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* $FreeBSD$
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*
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* last edit-date: [Fri Jan 5 11:33:47 2001]
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*
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*---------------------------------------------------------------------------*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: i4b_l4if.c,v 1.3 2001/11/13 01:06:22 lukem Exp $");
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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/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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#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 <netisdn/i4b_debug.h>
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#include <netisdn/i4b_ioctl.h>
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#include <netisdn/i4b_cause.h>
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#endif
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#include <netisdn/i4b_isdnq931.h>
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#include <netisdn/i4b_l1l2.h>
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#include <netisdn/i4b_l3l4.h>
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#include <netisdn/i4b_mbuf.h>
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#include <netisdn/i4b_global.h>
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#include <netisdn/i4b_l2.h>
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#include <netisdn/i4b_l3.h>
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#include <netisdn/i4b_l3fsm.h>
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#include <netisdn/i4b_q931.h>
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#include <netisdn/i4b_l4.h>
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extern void isic_settrace(int unit, int val); /*XXX*/
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extern int isic_gettrace(int unit); /*XXX*/
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static void n_connect_request(u_int cdid);
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static void n_connect_response(u_int cdid, int response, int cause);
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static void n_disconnect_request(u_int cdid, int cause);
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static void n_alert_request(u_int cdid);
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static void n_mgmt_command(int bri, int cmd, void *parm);
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/*---------------------------------------------------------------------------*
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* i4b_mdl_status_ind - status indication from lower layers
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*---------------------------------------------------------------------------*/
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int
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i4b_mdl_status_ind(int bri, int status, int parm)
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{
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struct l2_softc * l2sc = (struct l2_softc*)isdn_find_l2_by_bri(bri);
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int sendup;
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int i;
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NDBGL3(L3_MSG, "bri = %d, status = %d, parm = %d", bri, status, parm);
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switch(status)
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{
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case STI_ATTACH:
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NDBGL3(L3_MSG, "STI_ATTACH: attaching bri %d to controller %d", bri, nctrl);
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/* init function pointers */
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ctrl_desc[nctrl].N_CONNECT_REQUEST = n_connect_request;
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ctrl_desc[nctrl].N_CONNECT_RESPONSE = n_connect_response;
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ctrl_desc[nctrl].N_DISCONNECT_REQUEST = n_disconnect_request;
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ctrl_desc[nctrl].N_ALERT_REQUEST = n_alert_request;
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#if 0
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ctrl_desc[nctrl].N_DOWNLOAD = NULL; /* only used by active cards */
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ctrl_desc[nctrl].N_DIAGNOSTICS = NULL; /* only used by active cards */
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#endif
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ctrl_desc[nctrl].N_MGMT_COMMAND = n_mgmt_command;
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/* init type and unit */
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ctrl_desc[nctrl].l1_token = l2sc->l1_token;
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ctrl_desc[nctrl].bri = bri;
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ctrl_desc[nctrl].ctrl_type = CTRL_PASSIVE;
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ctrl_desc[nctrl].card_type = parm;
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/* state fields */
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ctrl_desc[nctrl].dl_est = DL_DOWN;
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ctrl_desc[nctrl].bch_state[CHAN_B1] = BCH_ST_FREE;
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ctrl_desc[nctrl].bch_state[CHAN_B2] = BCH_ST_FREE;
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ctrl_desc[nctrl].tei = -1;
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/* init unit to controller table */
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utoc_tab[bri] = nctrl;
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/* increment no. of controllers */
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nctrl++;
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break;
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case STI_L1STAT:
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i4b_l4_l12stat(bri, 1, parm);
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NDBGL3(L3_MSG, "STI_L1STAT: bri %d layer 1 = %s", bri, status ? "up" : "down");
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break;
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case STI_L2STAT:
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i4b_l4_l12stat(bri, 2, parm);
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NDBGL3(L3_MSG, "STI_L2STAT: bri %d layer 2 = %s", bri, status ? "up" : "down");
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break;
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case STI_TEIASG:
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ctrl_desc[bri].tei = parm;
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i4b_l4_teiasg(bri, parm);
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NDBGL3(L3_MSG, "STI_TEIASG: bri %d TEI = %d = 0x%02x", bri, parm, parm);
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break;
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case STI_PDEACT: /* L1 T4 timeout */
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NDBGL3(L3_ERR, "STI_PDEACT: bri %d TEI = %d = 0x%02x", bri, parm, parm);
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sendup = 0;
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for(i=0; i < N_CALL_DESC; i++)
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{
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if(call_desc[i].bri == bri)
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{
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i4b_l3_stop_all_timers(&(call_desc[i]));
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if(call_desc[i].cdid != CDID_UNUSED)
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sendup++;
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}
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}
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ctrl_desc[utoc_tab[bri]].dl_est = DL_DOWN;
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ctrl_desc[utoc_tab[bri]].bch_state[CHAN_B1] = BCH_ST_FREE;
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ctrl_desc[utoc_tab[bri]].bch_state[CHAN_B2] = BCH_ST_FREE;
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ctrl_desc[utoc_tab[bri]].tei = -1;
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if(sendup)
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{
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i4b_l4_pdeact(bri, sendup);
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call_desc[i].cdid = CDID_UNUSED;
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}
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break;
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case STI_NOL1ACC: /* no outgoing access to S0 */
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NDBGL3(L3_ERR, "STI_NOL1ACC: bri %d no outgoing access to S0", bri);
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for(i=0; i < N_CALL_DESC; i++)
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{
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if(call_desc[i].bri == bri)
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{
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if(call_desc[i].cdid != CDID_UNUSED)
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{
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SET_CAUSE_TYPE(call_desc[i].cause_in, CAUSET_I4B);
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SET_CAUSE_VAL(call_desc[i].cause_in, CAUSE_I4B_L1ERROR);
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i4b_l4_disconnect_ind(&(call_desc[i]));
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}
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}
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}
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ctrl_desc[utoc_tab[bri]].dl_est = DL_DOWN;
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ctrl_desc[utoc_tab[bri]].bch_state[CHAN_B1] = BCH_ST_FREE;
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ctrl_desc[utoc_tab[bri]].bch_state[CHAN_B2] = BCH_ST_FREE;
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ctrl_desc[utoc_tab[bri]].tei = -1;
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break;
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default:
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NDBGL3(L3_ERR, "ERROR, bri %d, unknown status value %d!", bri, status);
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break;
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}
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return(0);
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}
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/*---------------------------------------------------------------------------*
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* send command to the lower layers
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*---------------------------------------------------------------------------*/
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static void
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n_mgmt_command(int bri, int cmd, void *parm)
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{
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int i;
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switch(cmd)
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{
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case CMR_DOPEN:
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NDBGL3(L3_MSG, "CMR_DOPEN for bri %d", bri);
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for(i=0; i < N_CALL_DESC; i++)
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{
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if(call_desc[i].bri == bri)
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{
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call_desc[i].cdid = CDID_UNUSED;
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}
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}
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ctrl_desc[utoc_tab[bri]].dl_est = DL_DOWN;
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ctrl_desc[utoc_tab[bri]].bch_state[CHAN_B1] = BCH_ST_FREE;
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ctrl_desc[utoc_tab[bri]].bch_state[CHAN_B2] = BCH_ST_FREE;
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ctrl_desc[utoc_tab[bri]].tei = -1;
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break;
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case CMR_DCLOSE:
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NDBGL3(L3_MSG, "CMR_DCLOSE for bri %d", bri);
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break;
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default:
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NDBGL3(L3_MSG, "unknown cmd %d for bri %d", cmd, bri);
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break;
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}
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i4b_mdl_command_req(bri, cmd, parm);
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}
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/*---------------------------------------------------------------------------*
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* handle connect request message from userland
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*---------------------------------------------------------------------------*/
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static void
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n_connect_request(u_int cdid)
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{
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call_desc_t *cd;
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cd = cd_by_cdid(cdid);
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next_l3state(cd, EV_SETUPRQ);
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}
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/*---------------------------------------------------------------------------*
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* handle setup response message from userland
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*---------------------------------------------------------------------------*/
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static void
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n_connect_response(u_int cdid, int response, int cause)
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{
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call_desc_t *cd;
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int chstate;
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cd = cd_by_cdid(cdid);
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T400_stop(cd);
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cd->response = response;
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cd->cause_out = cause;
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switch(response)
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{
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case SETUP_RESP_ACCEPT:
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next_l3state(cd, EV_SETACRS);
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chstate = BCH_ST_USED;
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break;
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case SETUP_RESP_REJECT:
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next_l3state(cd, EV_SETRJRS);
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chstate = BCH_ST_FREE;
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break;
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case SETUP_RESP_DNTCRE:
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next_l3state(cd, EV_SETDCRS);
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chstate = BCH_ST_FREE;
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break;
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default: /* failsafe */
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next_l3state(cd, EV_SETDCRS);
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chstate = BCH_ST_FREE;
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NDBGL3(L3_ERR, "unknown response, doing SETUP_RESP_DNTCRE");
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break;
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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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ctrl_desc[cd->bri].bch_state[cd->channelid] = chstate;
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}
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else
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{
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NDBGL3(L3_MSG, "Warning, invalid channelid %d, response = %d\n", cd->channelid, response);
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}
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}
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/*---------------------------------------------------------------------------*
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* handle disconnect request message from userland
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*---------------------------------------------------------------------------*/
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static void
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n_disconnect_request(u_int cdid, int cause)
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{
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call_desc_t *cd;
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cd = cd_by_cdid(cdid);
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cd->cause_out = cause;
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next_l3state(cd, EV_DISCRQ);
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}
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/*---------------------------------------------------------------------------*
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* handle alert request message from userland
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*---------------------------------------------------------------------------*/
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static void
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n_alert_request(u_int cdid)
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{
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call_desc_t *cd;
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cd = cd_by_cdid(cdid);
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next_l3state(cd, EV_ALERTRQ);
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}
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#endif /* NI4BQ931 > 0 */
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