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NetBSD/sys/netisdn/i4b_l4if.c

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/*
* Copyright (c) 1997, 2000 Hellmuth Michaelis. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*---------------------------------------------------------------------------
*
* i4b_l4if.c - Layer 3 interface to Layer 4
* -------------------------------------------
*
* $Id: i4b_l4if.c,v 1.3 2001/11/13 01:06:22 lukem Exp $
*
* $FreeBSD$
*
* last edit-date: [Fri Jan 5 11:33:47 2001]
*
*---------------------------------------------------------------------------*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: i4b_l4if.c,v 1.3 2001/11/13 01:06:22 lukem Exp $");
#ifdef __FreeBSD__
#include "i4bq931.h"
#else
#define NI4BQ931 1
#endif
#if NI4BQ931 > 0
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <net/if.h>
#if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
#include <sys/callout.h>
#endif
#ifdef __FreeBSD__
#include <machine/i4b_debug.h>
#include <machine/i4b_ioctl.h>
#include <machine/i4b_cause.h>
#else
#include <netisdn/i4b_debug.h>
#include <netisdn/i4b_ioctl.h>
#include <netisdn/i4b_cause.h>
#endif
#include <netisdn/i4b_isdnq931.h>
#include <netisdn/i4b_l1l2.h>
#include <netisdn/i4b_l3l4.h>
#include <netisdn/i4b_mbuf.h>
#include <netisdn/i4b_global.h>
#include <netisdn/i4b_l2.h>
#include <netisdn/i4b_l3.h>
#include <netisdn/i4b_l3fsm.h>
#include <netisdn/i4b_q931.h>
#include <netisdn/i4b_l4.h>
extern void isic_settrace(int unit, int val); /*XXX*/
extern int isic_gettrace(int unit); /*XXX*/
static void n_connect_request(u_int cdid);
static void n_connect_response(u_int cdid, int response, int cause);
static void n_disconnect_request(u_int cdid, int cause);
static void n_alert_request(u_int cdid);
static void n_mgmt_command(int bri, int cmd, void *parm);
/*---------------------------------------------------------------------------*
* i4b_mdl_status_ind - status indication from lower layers
*---------------------------------------------------------------------------*/
int
i4b_mdl_status_ind(int bri, int status, int parm)
{
struct l2_softc * l2sc = (struct l2_softc*)isdn_find_l2_by_bri(bri);
int sendup;
int i;
NDBGL3(L3_MSG, "bri = %d, status = %d, parm = %d", bri, status, parm);
switch(status)
{
case STI_ATTACH:
NDBGL3(L3_MSG, "STI_ATTACH: attaching bri %d to controller %d", bri, nctrl);
/* init function pointers */
ctrl_desc[nctrl].N_CONNECT_REQUEST = n_connect_request;
ctrl_desc[nctrl].N_CONNECT_RESPONSE = n_connect_response;
ctrl_desc[nctrl].N_DISCONNECT_REQUEST = n_disconnect_request;
ctrl_desc[nctrl].N_ALERT_REQUEST = n_alert_request;
#if 0
ctrl_desc[nctrl].N_DOWNLOAD = NULL; /* only used by active cards */
ctrl_desc[nctrl].N_DIAGNOSTICS = NULL; /* only used by active cards */
#endif
ctrl_desc[nctrl].N_MGMT_COMMAND = n_mgmt_command;
/* init type and unit */
ctrl_desc[nctrl].l1_token = l2sc->l1_token;
ctrl_desc[nctrl].bri = bri;
ctrl_desc[nctrl].ctrl_type = CTRL_PASSIVE;
ctrl_desc[nctrl].card_type = parm;
/* state fields */
ctrl_desc[nctrl].dl_est = DL_DOWN;
ctrl_desc[nctrl].bch_state[CHAN_B1] = BCH_ST_FREE;
ctrl_desc[nctrl].bch_state[CHAN_B2] = BCH_ST_FREE;
ctrl_desc[nctrl].tei = -1;
/* init unit to controller table */
utoc_tab[bri] = nctrl;
/* increment no. of controllers */
nctrl++;
break;
case STI_L1STAT:
i4b_l4_l12stat(bri, 1, parm);
NDBGL3(L3_MSG, "STI_L1STAT: bri %d layer 1 = %s", bri, status ? "up" : "down");
break;
case STI_L2STAT:
i4b_l4_l12stat(bri, 2, parm);
NDBGL3(L3_MSG, "STI_L2STAT: bri %d layer 2 = %s", bri, status ? "up" : "down");
break;
case STI_TEIASG:
ctrl_desc[bri].tei = parm;
i4b_l4_teiasg(bri, parm);
NDBGL3(L3_MSG, "STI_TEIASG: bri %d TEI = %d = 0x%02x", bri, parm, parm);
break;
case STI_PDEACT: /* L1 T4 timeout */
NDBGL3(L3_ERR, "STI_PDEACT: bri %d TEI = %d = 0x%02x", bri, parm, parm);
sendup = 0;
for(i=0; i < N_CALL_DESC; i++)
{
if(call_desc[i].bri == bri)
{
i4b_l3_stop_all_timers(&(call_desc[i]));
if(call_desc[i].cdid != CDID_UNUSED)
sendup++;
}
}
ctrl_desc[utoc_tab[bri]].dl_est = DL_DOWN;
ctrl_desc[utoc_tab[bri]].bch_state[CHAN_B1] = BCH_ST_FREE;
ctrl_desc[utoc_tab[bri]].bch_state[CHAN_B2] = BCH_ST_FREE;
ctrl_desc[utoc_tab[bri]].tei = -1;
if(sendup)
{
i4b_l4_pdeact(bri, sendup);
call_desc[i].cdid = CDID_UNUSED;
}
break;
case STI_NOL1ACC: /* no outgoing access to S0 */
NDBGL3(L3_ERR, "STI_NOL1ACC: bri %d no outgoing access to S0", bri);
for(i=0; i < N_CALL_DESC; i++)
{
if(call_desc[i].bri == bri)
{
if(call_desc[i].cdid != CDID_UNUSED)
{
SET_CAUSE_TYPE(call_desc[i].cause_in, CAUSET_I4B);
SET_CAUSE_VAL(call_desc[i].cause_in, CAUSE_I4B_L1ERROR);
i4b_l4_disconnect_ind(&(call_desc[i]));
}
}
}
ctrl_desc[utoc_tab[bri]].dl_est = DL_DOWN;
ctrl_desc[utoc_tab[bri]].bch_state[CHAN_B1] = BCH_ST_FREE;
ctrl_desc[utoc_tab[bri]].bch_state[CHAN_B2] = BCH_ST_FREE;
ctrl_desc[utoc_tab[bri]].tei = -1;
break;
default:
NDBGL3(L3_ERR, "ERROR, bri %d, unknown status value %d!", bri, status);
break;
}
return(0);
}
/*---------------------------------------------------------------------------*
* send command to the lower layers
*---------------------------------------------------------------------------*/
static void
n_mgmt_command(int bri, int cmd, void *parm)
{
int i;
switch(cmd)
{
case CMR_DOPEN:
NDBGL3(L3_MSG, "CMR_DOPEN for bri %d", bri);
for(i=0; i < N_CALL_DESC; i++)
{
if(call_desc[i].bri == bri)
{
call_desc[i].cdid = CDID_UNUSED;
}
}
ctrl_desc[utoc_tab[bri]].dl_est = DL_DOWN;
ctrl_desc[utoc_tab[bri]].bch_state[CHAN_B1] = BCH_ST_FREE;
ctrl_desc[utoc_tab[bri]].bch_state[CHAN_B2] = BCH_ST_FREE;
ctrl_desc[utoc_tab[bri]].tei = -1;
break;
case CMR_DCLOSE:
NDBGL3(L3_MSG, "CMR_DCLOSE for bri %d", bri);
break;
default:
NDBGL3(L3_MSG, "unknown cmd %d for bri %d", cmd, bri);
break;
}
i4b_mdl_command_req(bri, cmd, parm);
}
/*---------------------------------------------------------------------------*
* handle connect request message from userland
*---------------------------------------------------------------------------*/
static void
n_connect_request(u_int cdid)
{
call_desc_t *cd;
cd = cd_by_cdid(cdid);
next_l3state(cd, EV_SETUPRQ);
}
/*---------------------------------------------------------------------------*
* handle setup response message from userland
*---------------------------------------------------------------------------*/
static void
n_connect_response(u_int cdid, int response, int cause)
{
call_desc_t *cd;
int chstate;
cd = cd_by_cdid(cdid);
T400_stop(cd);
cd->response = response;
cd->cause_out = cause;
switch(response)
{
case SETUP_RESP_ACCEPT:
next_l3state(cd, EV_SETACRS);
chstate = BCH_ST_USED;
break;
case SETUP_RESP_REJECT:
next_l3state(cd, EV_SETRJRS);
chstate = BCH_ST_FREE;
break;
case SETUP_RESP_DNTCRE:
next_l3state(cd, EV_SETDCRS);
chstate = BCH_ST_FREE;
break;
default: /* failsafe */
next_l3state(cd, EV_SETDCRS);
chstate = BCH_ST_FREE;
NDBGL3(L3_ERR, "unknown response, doing SETUP_RESP_DNTCRE");
break;
}
if((cd->channelid == CHAN_B1) || (cd->channelid == CHAN_B2))
{
ctrl_desc[cd->bri].bch_state[cd->channelid] = chstate;
}
else
{
NDBGL3(L3_MSG, "Warning, invalid channelid %d, response = %d\n", cd->channelid, response);
}
}
/*---------------------------------------------------------------------------*
* handle disconnect request message from userland
*---------------------------------------------------------------------------*/
static void
n_disconnect_request(u_int cdid, int cause)
{
call_desc_t *cd;
cd = cd_by_cdid(cdid);
cd->cause_out = cause;
next_l3state(cd, EV_DISCRQ);
}
/*---------------------------------------------------------------------------*
* handle alert request message from userland
*---------------------------------------------------------------------------*/
static void
n_alert_request(u_int cdid)
{
call_desc_t *cd;
cd = cd_by_cdid(cdid);
next_l3state(cd, EV_ALERTRQ);
}
#endif /* NI4BQ931 > 0 */
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