Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
4d440b4035
NetBSD/sys/netisdn/i4b_l4if.c
martin 5171d409a5 First step to cleanup the hardware driver <-> upper layers interface. 
This now provides slightly more functionality than the FreeBSD layer1-newbus
interface. It was meant to be a simple change to one header and a few
c files, but the change rippled all through various stuff.

To prevent a change to the kernel<->userland interface right now the kernel
is now lying about card types to userland (but who cares). This will be fixed
when the userland interface changes, after layer 3 <-> layer 4 has been
fixed.

Functional changes:

Provide a clean interface for hardware drivers to attach to the upper
layers. This will need another small change in the B-channel handling
when a similar change to the layer 3 <-> layer 4 interface happens.

Avoid passing indices into global arrays of pointers around, instead pass
the pointers itself. Don't code hardware driver types by predefined magic
numbers (think LKM). Prepare for detachable drivers (think pcmcia).

While there remove some sets of function pointers always pointing to the
same function (meant to be the configurable set of D channel protocol
handlers). It is unlikely another supported D-channel protocol will fit into
that (maximal layer interface) abstraction. When we get support for another
protocol, we will need to come up with a workable interface. Besides, the
old implementation was, uhm, strange.
2001-03-24 12:40:29 +00:00

344 lines
9.3 KiB
C
Raw Blame History

/*
* 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 1.2 2001/03/24 12:40:32 martin Exp $
*
* $FreeBSD$
*
* last edit-date: [Fri Jan 5 11:33:47 2001]
*
*---------------------------------------------------------------------------*/
#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 */
Reference in New Issue View Git Blame Copy Permalink