NetBSD-5.0.2/sys/netisdn/i4b_trace.c
/*
* 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.
*
*---------------------------------------------------------------------------
*
* i4btrc - device driver for trace data read device
* ---------------------------------------------------
*
* $Id: i4b_trace.c,v 1.18 2007/03/04 06:03:31 christos Exp $
*
* last edit-date: [Fri Jan 5 11:33:47 2001]
*
*
*---------------------------------------------------------------------------*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: i4b_trace.c,v 1.18 2007/03/04 06:03:31 christos Exp $");
#include "isdntrc.h"
#if NISDNTRC > 0
#include <sys/param.h>
#include <sys/systm.h>
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
#include <sys/ioccom.h>
#else
#include <sys/ioctl.h>
#endif
#include <sys/conf.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <net/if.h>
#include <sys/proc.h>
#include <sys/tty.h>
#include <netisdn/i4b_trace.h>
#include <netisdn/i4b_ioctl.h>
#include <netisdn/i4b_mbuf.h>
#include <netisdn/i4b_global.h>
#include <netisdn/i4b_debug.h>
#include <netisdn/i4b_l3l4.h>
#include <netisdn/i4b_l2.h>
#include <netisdn/i4b_l1l2.h>
static struct ifqueue trace_queue[NISDNTRC];
static int device_state[NISDNTRC];
#define ST_IDLE 0x00
#define ST_ISOPEN 0x01
#define ST_WAITDATA 0x02
static int analyzemode = 0; /* we are in anlyzer mode */
static int rxunit = -1; /* l2 isdnif of receiving driver */
static int txunit = -1; /* l2 isdnif of transmitting driver */
static int outunit = -1; /* output device for trace data */
#define PDEVSTATIC /* - not static - */
void isdntrcattach __P((void));
int isdntrcopen __P((dev_t dev, int flag, int fmt, struct lwp *l));
int isdntrcclose __P((dev_t dev, int flag, int fmt, struct lwp *l));
int isdntrcread __P((dev_t dev, struct uio * uio, int ioflag));
int isdntrcioctl __P((dev_t dev, u_long cmd, void *data, int flag, struct lwp *l));
#ifdef __NetBSD__
const struct cdevsw isdntrc_cdevsw = {
isdntrcopen, isdntrcclose, isdntrcread, nowrite, isdntrcioctl,
nostop, notty, nopoll, nommap, nokqfilter, D_OTHER
};
#endif /* __NetBSD__ */
/*---------------------------------------------------------------------------*
* interface attach routine
*---------------------------------------------------------------------------*/
PDEVSTATIC void
#ifdef __FreeBSD__
isdntrcattach(void *dummy)
#else
isdntrcattach()
#endif
{
int i;
for(i=0; i < NISDNTRC; i++)
{
#if defined(__FreeBSD__)
#if __FreeBSD__ < 4
#ifdef DEVFS
devfs_token[i]
= devfs_add_devswf(&i4btrc_cdevsw, i, DV_CHR,
UID_ROOT, GID_WHEEL, 0600,
"isdntrc%d", i);
#endif
#else
make_dev(&i4btrc_cdevsw, i,
UID_ROOT, GID_WHEEL, 0600, "isdntrc%d", i);
#endif
#endif
trace_queue[i].ifq_maxlen = IFQ_MAXLEN;
device_state[i] = ST_IDLE;
}
}
/*---------------------------------------------------------------------------*
* isdn_layer2_trace_ind
* ---------------------
* is called from layer 1, adds timestamp to trace data and puts
* it into a queue, from which it can be read from the i4btrc
* device. The unit number in the trace header selects the minor
* device's queue the data is put into.
*---------------------------------------------------------------------------*/
int
isdn_layer2_trace_ind(struct l2_softc *sc, struct isdn_l3_driver *drv, i4b_trace_hdr *hdr, size_t len, unsigned char *buf)
{
struct mbuf *m;
int isdnif, x;
int trunc = 0;
int totlen = len + sizeof(i4b_trace_hdr);
MICROTIME(hdr->time);
hdr->isdnif = sc->drv->isdnif;
/*
* for telephony (or better non-HDLC HSCX mode) we get
* (MCLBYTE + sizeof(i4b_trace_hdr_t)) length packets
* to put into the queue to userland. because of this
* we detect this situation, strip the length to MCLBYTES
* max size, and infor the userland program of this fact
* by putting the no of truncated bytes into hdr->trunc.
*/
if(totlen > MCLBYTES)
{
trunc = 1;
hdr->trunc = totlen - MCLBYTES;
totlen = MCLBYTES;
}
else
{
hdr->trunc = 0;
}
/* set length of trace record */
hdr->length = totlen;
/* check valid interface */
if((isdnif = hdr->isdnif) > NISDNTRC)
{
printf("i4b_trace: get_trace_data_from_l1 - isdnif > NISDNTRC!\n");
return(0);
}
/* get mbuf */
if(!(m = i4b_Bgetmbuf(totlen)))
{
printf("i4b_trace: get_trace_data_from_l1 - i4b_getmbuf() failed!\n");
return(0);
}
/* check if we are in analyzemode */
if(analyzemode && (isdnif == rxunit || isdnif == txunit))
{
if(isdnif == rxunit)
hdr->dir = FROM_NT;
else
hdr->dir = FROM_TE;
isdnif = outunit;
}
if(IF_QFULL(&trace_queue[isdnif]))
{
struct mbuf *m1;
x = splnet();
IF_DEQUEUE(&trace_queue[isdnif], m1);
splx(x);
i4b_Bfreembuf(m1);
}
/* copy trace header */
memcpy(m->m_data, hdr, sizeof(i4b_trace_hdr));
/* copy trace data */
if(trunc)
memcpy(&m->m_data[sizeof(i4b_trace_hdr)], buf, totlen-sizeof(i4b_trace_hdr));
else
memcpy(&m->m_data[sizeof(i4b_trace_hdr)], buf, len);
x = splnet();
IF_ENQUEUE(&trace_queue[isdnif], m);
if(device_state[isdnif] & ST_WAITDATA)
{
device_state[isdnif] &= ~ST_WAITDATA;
wakeup((void *) &trace_queue[isdnif]);
}
splx(x);
return(1);
}
/*---------------------------------------------------------------------------*
* open trace device
*---------------------------------------------------------------------------*/
PDEVSTATIC int
isdntrcopen(dev_t dev, int flag, int fmt,
struct lwp *l)
{
int x;
int unit = minor(dev);
if(unit >= NISDNTRC)
return(ENXIO);
if(device_state[unit] & ST_ISOPEN)
return(EBUSY);
if(analyzemode && (unit == outunit || unit == rxunit || unit == txunit))
return(EBUSY);
x = splnet();
device_state[unit] = ST_ISOPEN;
splx(x);
return(0);
}
/*---------------------------------------------------------------------------*
* close trace device
*---------------------------------------------------------------------------*/
PDEVSTATIC int
isdntrcclose(dev_t dev, int flag, int fmt,
struct lwp *l)
{
int isdnif = minor(dev);
int x;
if (analyzemode && (isdnif == outunit)) {
l2_softc_t * rx_l2sc, * tx_l2sc;
analyzemode = 0;
outunit = -1;
rx_l2sc = (l2_softc_t*)isdn_find_softc_by_isdnif(rxunit);
tx_l2sc = (l2_softc_t*)isdn_find_softc_by_isdnif(txunit);
if (rx_l2sc != NULL)
rx_l2sc->driver->mph_command_req(rx_l2sc->l1_token, CMR_SETTRACE, TRACE_OFF);
if (tx_l2sc != NULL)
tx_l2sc->driver->mph_command_req(tx_l2sc->l1_token, CMR_SETTRACE, TRACE_OFF);
x = splnet();
device_state[rxunit] = ST_IDLE;
device_state[txunit] = ST_IDLE;
splx(x);
rxunit = -1;
txunit = -1;
} else {
l2_softc_t * l2sc = (l2_softc_t*)isdn_find_softc_by_isdnif(isdnif);
if (l2sc != NULL) {
l2sc->driver->mph_command_req(l2sc->l1_token, CMR_SETTRACE, TRACE_OFF);
x = splnet();
device_state[isdnif] = ST_IDLE;
splx(x);
}
}
return(0);
}
/*---------------------------------------------------------------------------*
* read from trace device
*---------------------------------------------------------------------------*/
PDEVSTATIC int
isdntrcread(dev_t dev, struct uio * uio, int ioflag)
{
struct mbuf *m;
int x;
int error = 0;
int unit = minor(dev);
if(!(device_state[unit] & ST_ISOPEN))
return(EIO);
x = splnet();
while(IF_QEMPTY(&trace_queue[unit]) && (device_state[unit] & ST_ISOPEN))
{
device_state[unit] |= ST_WAITDATA;
if((error = tsleep((void *) &trace_queue[unit],
TTIPRI | PCATCH,
"bitrc", 0 )) != 0)
{
device_state[unit] &= ~ST_WAITDATA;
splx(x);
return(error);
}
}
IF_DEQUEUE(&trace_queue[unit], m);
if(m && m->m_len)
error = uiomove(m->m_data, m->m_len, uio);
else
error = EIO;
if(m)
i4b_Bfreembuf(m);
splx(x);
return(error);
}
#if defined(__FreeBSD__) && defined(OS_USES_POLL)
/*---------------------------------------------------------------------------*
* poll device
*---------------------------------------------------------------------------*/
PDEVSTATIC int
i4btrcpoll(dev_t dev, int events, struct proc *p)
{
return(ENODEV);
}
#endif
/*---------------------------------------------------------------------------*
* device driver ioctl routine
*---------------------------------------------------------------------------*/
PDEVSTATIC int
isdntrcioctl(dev_t dev, u_long cmd, void *data, int flag,
struct lwp *l)
{
int error = 0;
int isdnif = minor(dev);
i4b_trace_setupa_t *tsa;
l2_softc_t * l2sc = (l2_softc_t*)isdn_find_softc_by_isdnif(isdnif);
switch(cmd)
{
case I4B_TRC_SET:
if (l2sc == NULL)
return ENOTTY;
l2sc->driver->mph_command_req(l2sc->l1_token, CMR_SETTRACE, (void *)*(unsigned long *)data);
break;
case I4B_TRC_SETA:
tsa = (i4b_trace_setupa_t *)data;
if(tsa->rxunit >= 0 && tsa->rxunit < NISDNTRC)
rxunit = tsa->rxunit;
else
error = EINVAL;
if(tsa->txunit >= 0 && tsa->txunit < NISDNTRC)
txunit = tsa->txunit;
else
error = EINVAL;
if(error)
{
outunit = -1;
rxunit = -1;
txunit = -1;
}
else
{
l2_softc_t * rx_l2sc, * tx_l2sc;
rx_l2sc = (l2_softc_t*)(l2_softc_t*)isdn_find_softc_by_isdnif(rxunit);
tx_l2sc = (l2_softc_t*)(l2_softc_t*)isdn_find_softc_by_isdnif(txunit);
if (l2sc == NULL || rx_l2sc == NULL || tx_l2sc == NULL)
return ENOTTY;
outunit = isdnif;
analyzemode = 1;
rx_l2sc->driver->mph_command_req(rx_l2sc->l1_token, CMR_SETTRACE, (void *)(unsigned long)(tsa->rxflags & (TRACE_I | TRACE_D_RX | TRACE_B_RX)));
tx_l2sc->driver->mph_command_req(tx_l2sc->l1_token, CMR_SETTRACE, (void *)(unsigned long)(tsa->txflags & (TRACE_I | TRACE_D_RX | TRACE_B_RX)));
}
break;
case I4B_TRC_RESETA:
analyzemode = 0;
outunit = -1;
rxunit = -1;
txunit = -1;
break;
default:
error = ENOTTY;
break;
}
return(error);
}
#endif /* NISDNTRC > 0 */