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freebsd/sys/i4b/layer4/i4b_i4bdrv.c

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/*-
* Copyright (c) 1997, 2002 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_i4bdrv.c - i4b userland interface driver
* --------------------------------------------
* last edit-date: [Sun Aug 11 12:42:46 2002]
*
*---------------------------------------------------------------------------*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_i4b.h"
#include <sys/param.h>
#include <sys/ioccom.h>
#include <sys/malloc.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/selinfo.h>
#include <net/if.h>
#include <machine/i4b_debug.h>
#include <machine/i4b_ioctl.h>
#include <machine/i4b_cause.h>
#include <i4b/include/i4b_l3l4.h>
#include <i4b/include/i4b_mbuf.h>
#include <i4b/include/i4b_global.h>
#include <i4b/layer4/i4b_l4.h>
#include <sys/poll.h>
struct selinfo select_rd_info;
static struct ifqueue i4b_rdqueue;
static int openflag = 0;
static int selflag = 0;
static int readflag = 0;
static d_open_t i4bopen;
static d_close_t i4bclose;
static d_read_t i4bread;
static d_ioctl_t i4bioctl;
static d_poll_t i4bpoll;
static struct cdevsw i4b_cdevsw = {
.d_version = D_VERSION,
.d_flags = D_NEEDGIANT,
.d_open = i4bopen,
.d_close = i4bclose,
.d_read = i4bread,
.d_ioctl = i4bioctl,
.d_poll = i4bpoll,
.d_name = "i4b",
};
static void i4battach(void *);
PSEUDO_SET(i4battach, i4b_i4bdrv);
/*---------------------------------------------------------------------------*
* interface attach routine
*---------------------------------------------------------------------------*/
static void
i4battach(void *dummy)
{
printf("i4b: ISDN call control device attached\n");
i4b_rdqueue.ifq_maxlen = IFQ_MAXLEN;
if(!mtx_initialized(&i4b_rdqueue.ifq_mtx))
mtx_init(&i4b_rdqueue.ifq_mtx, "i4b_rdqueue", NULL, MTX_DEF);
make_dev(&i4b_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600, "i4b");
}
/*---------------------------------------------------------------------------*
* i4bopen - device driver open routine
*---------------------------------------------------------------------------*/
static int
i4bopen(struct cdev *dev, int flag, int fmt, struct thread *td)
{
int x;
if(minor(dev))
return(ENXIO);
if(openflag)
return(EBUSY);
x = splimp();
openflag = 1;
i4b_l4_daemon_attached();
splx(x);
return(0);
}
/*---------------------------------------------------------------------------*
* i4bclose - device driver close routine
*---------------------------------------------------------------------------*/
static int
i4bclose(struct cdev *dev, int flag, int fmt, struct thread *td)
{
int x = splimp();
openflag = 0;
i4b_l4_daemon_detached();
i4b_Dcleanifq(&i4b_rdqueue);
splx(x);
return(0);
}
/*---------------------------------------------------------------------------*
* i4bread - device driver read routine
*---------------------------------------------------------------------------*/
static int
i4bread(struct cdev *dev, struct uio *uio, int ioflag)
{
struct mbuf *m;
int x;
int error = 0;
if(minor(dev))
return(ENODEV);
x = splimp();
IF_LOCK(&i4b_rdqueue);
while(IF_QEMPTY(&i4b_rdqueue))
{
readflag = 1;
error = msleep( &i4b_rdqueue, &i4b_rdqueue.ifq_mtx,
(PZERO + 1) | PCATCH, "bird", 0);
if (error != 0) {
IF_UNLOCK(&i4b_rdqueue);
splx(x);
return error;
}
}
_IF_DEQUEUE(&i4b_rdqueue, m);
IF_UNLOCK(&i4b_rdqueue);
splx(x);
if(m && m->m_len)
error = uiomove(m->m_data, m->m_len, uio);
else
error = EIO;
if(m)
i4b_Dfreembuf(m);
return(error);
}
/*---------------------------------------------------------------------------*
* i4bioctl - device driver ioctl routine
*---------------------------------------------------------------------------*/
static int
i4bioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
{
call_desc_t *cd;
int error = 0;
if(minor(dev))
return(ENODEV);
switch(cmd)
{
/* cdid request, reserve cd and return cdid */
case I4B_CDID_REQ:
{
msg_cdid_req_t *mir;
mir = (msg_cdid_req_t *)data;
cd = reserve_cd();
mir->cdid = cd->cdid;
break;
}
/* connect request, dial out to remote */
case I4B_CONNECT_REQ:
{
msg_connect_req_t *mcr;
mcr = (msg_connect_req_t *)data; /* setup ptr */
if((cd = cd_by_cdid(mcr->cdid)) == NULL)/* get cd */
{
NDBGL4(L4_ERR, "I4B_CONNECT_REQ ioctl, cdid not found!");
error = EINVAL;
break;
}
/* prevent dialling on leased lines */
if(ctrl_desc[mcr->controller].protocol == PROTOCOL_D64S)
{
SET_CAUSE_TYPE(cd->cause_in, CAUSET_I4B);
SET_CAUSE_VAL(cd->cause_in, CAUSE_I4B_LLDIAL);
i4b_l4_disconnect_ind(cd);
freecd_by_cd(cd);
break;
}
cd->controller = mcr->controller; /* fill cd */
cd->bprot = mcr->bprot;
cd->bcap = mcr->bcap;
cd->driver = mcr->driver;
cd->driver_unit = mcr->driver_unit;
cd->cr = get_rand_cr(ctrl_desc[cd->controller].unit);
cd->shorthold_data.shorthold_algorithm = mcr->shorthold_data.shorthold_algorithm;
cd->shorthold_data.unitlen_time = mcr->shorthold_data.unitlen_time;
cd->shorthold_data.idle_time = mcr->shorthold_data.idle_time;
cd->shorthold_data.earlyhup_time = mcr->shorthold_data.earlyhup_time;
cd->last_aocd_time = 0;
if(mcr->unitlen_method == ULEN_METHOD_DYNAMIC)
cd->aocd_flag = 1;
else
cd->aocd_flag = 0;
cd->cunits = 0;
cd->max_idle_time = 0; /* this is outgoing */
cd->dir = DIR_OUTGOING;
NDBGL4(L4_TIMO, "I4B_CONNECT_REQ times, algorithm=%ld unitlen=%ld idle=%ld earlyhup=%ld",
(long)cd->shorthold_data.shorthold_algorithm, (long)cd->shorthold_data.unitlen_time,
(long)cd->shorthold_data.idle_time, (long)cd->shorthold_data.earlyhup_time);
strcpy(cd->dst_telno, mcr->dst_telno);
strcpy(cd->src_telno, mcr->src_telno);
strcpy(cd->dst_subaddr, mcr->dst_subaddr);
strcpy(cd->src_subaddr, mcr->src_subaddr);
if(mcr->keypad[0] != '\0')
strcpy(cd->keypad, mcr->keypad);
else
cd->keypad[0] = '\0';
cd->display[0] = '\0';
SET_CAUSE_TYPE(cd->cause_in, CAUSET_I4B);
SET_CAUSE_VAL(cd->cause_in, CAUSE_I4B_NORMAL);
switch(mcr->channel)
{
case CHAN_B1:
case CHAN_B2:
if(ctrl_desc[mcr->controller].bch_state[mcr->channel] != BCH_ST_FREE)
SET_CAUSE_VAL(cd->cause_in, CAUSE_I4B_NOCHAN);
break;
case CHAN_ANY:
{
int i;
for (i = 0;
i < ctrl_desc[mcr->controller].nbch &&
ctrl_desc[mcr->controller].bch_state[i] != BCH_ST_FREE;
i++);
if (i == ctrl_desc[mcr->controller].nbch)
SET_CAUSE_VAL(cd->cause_in, CAUSE_I4B_NOCHAN);
/* else mcr->channel = i; XXX */
}
break;
default:
SET_CAUSE_VAL(cd->cause_in, CAUSE_I4B_NOCHAN);
break;
}
cd->channelid = mcr->channel;
cd->isdntxdelay = mcr->txdelay;
/* check whether we have a pointer. Seems like */
/* this should be adequate. GJ 19.09.97 */
if(ctrl_desc[cd->controller].N_CONNECT_REQUEST == NULL)
/*XXX*/ SET_CAUSE_VAL(cd->cause_in, CAUSE_I4B_NOCHAN);
if((GET_CAUSE_VAL(cd->cause_in)) != CAUSE_I4B_NORMAL)
{
i4b_l4_disconnect_ind(cd);
freecd_by_cd(cd);
}
else
{
(*ctrl_desc[cd->controller].N_CONNECT_REQUEST)(mcr->cdid);
}
break;
}
/* connect response, accept/reject/ignore incoming call */
case I4B_CONNECT_RESP:
{
msg_connect_resp_t *mcrsp;
mcrsp = (msg_connect_resp_t *)data;
if((cd = cd_by_cdid(mcrsp->cdid)) == NULL)/* get cd */
{
NDBGL4(L4_ERR, "I4B_CONNECT_RESP ioctl, cdid not found!");
error = EINVAL;
break;
}
T400_stop(cd);
cd->driver = mcrsp->driver;
cd->driver_unit = mcrsp->driver_unit;
cd->max_idle_time = mcrsp->max_idle_time;
cd->shorthold_data.shorthold_algorithm = SHA_FIXU;
cd->shorthold_data.unitlen_time = 0; /* this is incoming */
cd->shorthold_data.idle_time = 0;
cd->shorthold_data.earlyhup_time = 0;
cd->isdntxdelay = mcrsp->txdelay;
NDBGL4(L4_TIMO, "I4B_CONNECT_RESP max_idle_time set to %ld seconds", (long)cd->max_idle_time);
(*ctrl_desc[cd->controller].N_CONNECT_RESPONSE)(mcrsp->cdid, mcrsp->response, mcrsp->cause);
break;
}
/* disconnect request, actively terminate connection */
case I4B_DISCONNECT_REQ:
{
msg_discon_req_t *mdr;
mdr = (msg_discon_req_t *)data;
if((cd = cd_by_cdid(mdr->cdid)) == NULL)/* get cd */
{
NDBGL4(L4_ERR, "I4B_DISCONNECT_REQ ioctl, cdid not found!");
error = EINVAL;
break;
}
/* preset causes with our cause */
cd->cause_in = cd->cause_out = mdr->cause;
(*ctrl_desc[cd->controller].N_DISCONNECT_REQUEST)(mdr->cdid, mdr->cause);
break;
}
/* controller info request */
case I4B_CTRL_INFO_REQ:
{
msg_ctrl_info_req_t *mcir;
mcir = (msg_ctrl_info_req_t *)data;
mcir->ncontroller = nctrl;
if(mcir->controller > nctrl)
{
mcir->ctrl_type = -1;
mcir->card_type = -1;
}
else
{
mcir->ctrl_type =
ctrl_desc[mcir->controller].ctrl_type;
mcir->card_type =
ctrl_desc[mcir->controller].card_type;
mcir->nbch =
ctrl_desc[mcir->controller].nbch;
if(ctrl_desc[mcir->controller].ctrl_type == CTRL_PASSIVE)
mcir->tei = ctrl_desc[mcir->controller].tei;
else
mcir->tei = -1;
}
break;
}
/* dial response */
case I4B_DIALOUT_RESP:
{
drvr_link_t *dlt = NULL;
msg_dialout_resp_t *mdrsp;
mdrsp = (msg_dialout_resp_t *)data;
switch(mdrsp->driver)
{
#if NI4BIPR > 0
case BDRV_IPR:
dlt = ipr_ret_linktab(mdrsp->driver_unit);
break;
#endif
#if NI4BISPPP > 0
case BDRV_ISPPP:
dlt = i4bisppp_ret_linktab(mdrsp->driver_unit);
break;
#endif
#if NI4BTEL > 0
case BDRV_TEL:
dlt = tel_ret_linktab(mdrsp->driver_unit);
break;
#endif
#if NIBC > 0
case BDRV_IBC:
dlt = ibc_ret_linktab(mdrsp->driver_unit);
break;
#endif
#if NI4BING > 0
case BDRV_ING:
dlt = ing_ret_linktab(mdrsp->driver_unit);
break;
#endif
}
if(dlt != NULL)
(*dlt->dial_response)(mdrsp->driver_unit, mdrsp->stat, mdrsp->cause);
break;
}
/* update timeout value */
case I4B_TIMEOUT_UPD:
{
msg_timeout_upd_t *mtu;
int x;
mtu = (msg_timeout_upd_t *)data;
NDBGL4(L4_TIMO, "I4B_TIMEOUT_UPD ioctl, alg %d, unit %d, idle %d, early %d!",
mtu->shorthold_data.shorthold_algorithm, mtu->shorthold_data.unitlen_time,
mtu->shorthold_data.idle_time, mtu->shorthold_data.earlyhup_time);
if((cd = cd_by_cdid(mtu->cdid)) == NULL)/* get cd */
{
NDBGL4(L4_ERR, "I4B_TIMEOUT_UPD ioctl, cdid not found!");
error = EINVAL;
break;
}
switch( mtu->shorthold_data.shorthold_algorithm )
{
case SHA_FIXU:
/*
* For this algorithm unitlen_time,
* idle_time and earlyhup_time are used.
*/
if(!(mtu->shorthold_data.unitlen_time >= 0 &&
mtu->shorthold_data.idle_time >= 0 &&
mtu->shorthold_data.earlyhup_time >= 0))
{
NDBGL4(L4_ERR, "I4B_TIMEOUT_UPD ioctl, invalid args for fix unit algorithm!");
error = EINVAL;
}
break;
case SHA_VARU:
/*
* For this algorithm unitlen_time and
* idle_time are used. both must be
* positive integers. earlyhup_time is
* not used and must be 0.
*/
if(!(mtu->shorthold_data.unitlen_time > 0 &&
mtu->shorthold_data.idle_time >= 0 &&
mtu->shorthold_data.earlyhup_time == 0))
{
NDBGL4(L4_ERR, "I4B_TIMEOUT_UPD ioctl, invalid args for var unit algorithm!");
error = EINVAL;
}
break;
default:
NDBGL4(L4_ERR, "I4B_TIMEOUT_UPD ioctl, invalid algorithm!");
error = EINVAL;
break;
}
/*
* any error set above requires us to break
* out of the outer switch
*/
if(error != 0)
break;
x = SPLI4B();
cd->shorthold_data.shorthold_algorithm = mtu->shorthold_data.shorthold_algorithm;
cd->shorthold_data.unitlen_time = mtu->shorthold_data.unitlen_time;
cd->shorthold_data.idle_time = mtu->shorthold_data.idle_time;
cd->shorthold_data.earlyhup_time = mtu->shorthold_data.earlyhup_time;
splx(x);
break;
}
/* soft enable/disable interface */
case I4B_UPDOWN_IND:
{
msg_updown_ind_t *mui;
mui = (msg_updown_ind_t *)data;
#if NI4BIPR > 0
if(mui->driver == BDRV_IPR)
{
drvr_link_t *dlt;
dlt = ipr_ret_linktab(mui->driver_unit);
(*dlt->updown_ind)(mui->driver_unit, mui->updown);
}
#endif
break;
}
/* send ALERT request */
case I4B_ALERT_REQ:
{
msg_alert_req_t *mar;
mar = (msg_alert_req_t *)data;
if((cd = cd_by_cdid(mar->cdid)) == NULL)
{
NDBGL4(L4_ERR, "I4B_ALERT_REQ ioctl, cdid not found!");
error = EINVAL;
break;
}
T400_stop(cd);
(*ctrl_desc[cd->controller].N_ALERT_REQUEST)(mar->cdid);
break;
}
/* version/release number request */
case I4B_VR_REQ:
{
msg_vr_req_t *mvr;
mvr = (msg_vr_req_t *)data;
mvr->version = VERSION;
mvr->release = REL;
mvr->step = STEP;
break;
}
/* set D-channel protocol for a controller */
case I4B_PROT_IND:
{
msg_prot_ind_t *mpi;
mpi = (msg_prot_ind_t *)data;
ctrl_desc[mpi->controller].protocol = mpi->protocol;
break;
}
/* Download request */
case I4B_CTRL_DOWNLOAD:
{
struct isdn_dr_prot *prots = NULL, *prots2 = NULL;
struct isdn_download_request *r =
(struct isdn_download_request*)data;
int i;
if (r->controller < 0 || r->controller >= nctrl)
{
error = ENODEV;
goto download_done;
}
if(!ctrl_desc[r->controller].N_DOWNLOAD)
{
error = ENODEV;
goto download_done;
}
prots = malloc(r->numprotos * sizeof(struct isdn_dr_prot),
M_DEVBUF, M_WAITOK);
prots2 = malloc(r->numprotos * sizeof(struct isdn_dr_prot),
M_DEVBUF, M_WAITOK);
if(!prots || !prots2)
{
error = ENOMEM;
goto download_done;
}
copyin(r->protocols, prots, r->numprotos * sizeof(struct isdn_dr_prot));
for(i = 0; i < r->numprotos; i++)
{
prots2[i].microcode = malloc(prots[i].bytecount, M_DEVBUF, M_WAITOK);
copyin(prots[i].microcode, prots2[i].microcode, prots[i].bytecount);
prots2[i].bytecount = prots[i].bytecount;
}
error = ctrl_desc[r->controller].N_DOWNLOAD(
ctrl_desc[r->controller].unit,
r->numprotos, prots2);
download_done:
if(prots2)
{
for(i = 0; i < r->numprotos; i++)
{
if(prots2[i].microcode)
{
free(prots2[i].microcode, M_DEVBUF);
}
}
free(prots2, M_DEVBUF);
}
if(prots)
{
free(prots, M_DEVBUF);
}
break;
}
/* Diagnostic request */
case I4B_ACTIVE_DIAGNOSTIC:
{
struct isdn_diagnostic_request req, *r =
(struct isdn_diagnostic_request*)data;
req.in_param = req.out_param = NULL;
if (r->controller < 0 || r->controller >= nctrl)
{
error = ENODEV;
goto diag_done;
}
if(!ctrl_desc[r->controller].N_DIAGNOSTICS)
{
error = ENODEV;
goto diag_done;
}
memcpy(&req, r, sizeof(req));
if(req.in_param_len)
{
/* XXX arbitrary limit */
if (req.in_param_len >
I4B_ACTIVE_DIAGNOSTIC_MAXPARAMLEN) {
error = EINVAL;
goto diag_done;
}
req.in_param = malloc(r->in_param_len, M_DEVBUF, M_WAITOK);
if(!req.in_param)
{
error = ENOMEM;
goto diag_done;
}
error = copyin(r->in_param, req.in_param, req.in_param_len);
if (error)
goto diag_done;
}
if(req.out_param_len)
{
req.out_param = malloc(r->out_param_len, M_DEVBUF, M_WAITOK);
if(!req.out_param)
{
error = ENOMEM;
goto diag_done;
}
}
error = ctrl_desc[r->controller].N_DIAGNOSTICS(r->controller, &req);
if(!error && req.out_param_len)
error = copyout(req.out_param, r->out_param, req.out_param_len);
diag_done:
if(req.in_param)
free(req.in_param, M_DEVBUF);
if(req.out_param)
free(req.out_param, M_DEVBUF);
break;
}
/* default */
default:
error = ENOTTY;
break;
}
return(error);
}
/*---------------------------------------------------------------------------*
* i4bpoll - device driver poll routine
*---------------------------------------------------------------------------*/
static int
i4bpoll(struct cdev *dev, int events, struct thread *td)
{
int x;
if(minor(dev))
return(ENODEV);
if((events & POLLIN) || (events & POLLRDNORM))
{
if(!IF_QEMPTY(&i4b_rdqueue))
return(1);
x = splimp();
selrecord(td, &select_rd_info);
selflag = 1;
splx(x);
return(0);
}
else if((events & POLLOUT) || (events & POLLWRNORM))
{
return(1);
}
return(0);
}
/*---------------------------------------------------------------------------*
* i4bputqueue - put message into queue to userland
*---------------------------------------------------------------------------*/
void
i4bputqueue(struct mbuf *m)
{
int x;
if(!openflag)
{
i4b_Dfreembuf(m);
return;
}
x = splimp();
IF_LOCK(&i4b_rdqueue);
if(_IF_QFULL(&i4b_rdqueue))
{
struct mbuf *m1;
_IF_DEQUEUE(&i4b_rdqueue, m1);
i4b_Dfreembuf(m1);
NDBGL4(L4_ERR, "ERROR, queue full, removing entry!");
}
_IF_ENQUEUE(&i4b_rdqueue, m);
IF_UNLOCK(&i4b_rdqueue);
splx(x);
if(readflag)
{
readflag = 0;
wakeup( &i4b_rdqueue);
}
if(selflag)
{
selflag = 0;
selwakeuppri(&select_rd_info, I4BPRI);
}
}
/*---------------------------------------------------------------------------*
* i4bputqueue_hipri - put message into front of queue to userland
*---------------------------------------------------------------------------*/
void
i4bputqueue_hipri(struct mbuf *m)
{
int x;
if(!openflag)
{
i4b_Dfreembuf(m);
return;
}
x = splimp();
IF_LOCK(&i4b_rdqueue);
if(_IF_QFULL(&i4b_rdqueue))
{
struct mbuf *m1;
_IF_DEQUEUE(&i4b_rdqueue, m1);
i4b_Dfreembuf(m1);
NDBGL4(L4_ERR, "ERROR, queue full, removing entry!");
}
_IF_PREPEND(&i4b_rdqueue, m);
IF_UNLOCK(&i4b_rdqueue);
splx(x);
if(readflag)
{
readflag = 0;
wakeup( &i4b_rdqueue);
}
if(selflag)
{
selflag = 0;
selwakeuppri(&select_rd_info, I4BPRI);
}
}
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