dae7af8b24
removing assumptions that there are only two B channels and by adding support for a varying number of channels. Due to this, rename previously used isdn identified "bri" to "isdnif", which better describes the current situation.
430 lines
11 KiB
C
430 lines
11 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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* i4btrc - device driver for trace data read device
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* ---------------------------------------------------
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*
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* $Id: i4b_trace.c,v 1.13 2003/10/03 16:38:44 pooka Exp $
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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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*---------------------------------------------------------------------------*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: i4b_trace.c,v 1.13 2003/10/03 16:38:44 pooka Exp $");
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#include "isdntrc.h"
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#if NISDNTRC > 0
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#include <sys/param.h>
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#include <sys/systm.h>
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#if defined(__FreeBSD__) && __FreeBSD__ >= 3
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#include <sys/ioccom.h>
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#else
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#include <sys/ioctl.h>
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#endif
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#include <sys/conf.h>
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#include <sys/uio.h>
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#include <sys/kernel.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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#include <sys/proc.h>
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#include <sys/tty.h>
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#include <netisdn/i4b_trace.h>
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#include <netisdn/i4b_ioctl.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_debug.h>
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#include <netisdn/i4b_l3l4.h>
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#include <netisdn/i4b_l2.h>
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#include <netisdn/i4b_l1l2.h>
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static struct ifqueue trace_queue[NISDNTRC];
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static int device_state[NISDNTRC];
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#define ST_IDLE 0x00
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#define ST_ISOPEN 0x01
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#define ST_WAITDATA 0x02
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static int analyzemode = 0; /* we are in anlyzer mode */
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static int rxunit = -1; /* l2 isdnif of receiving driver */
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static int txunit = -1; /* l2 isdnif of transmitting driver */
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static int outunit = -1; /* output device for trace data */
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#define PDEVSTATIC /* - not static - */
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void isdntrcattach __P((void));
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int isdntrcopen __P((dev_t dev, int flag, int fmt, struct proc *p));
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int isdntrcclose __P((dev_t dev, int flag, int fmt, struct proc *p));
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int isdntrcread __P((dev_t dev, struct uio * uio, int ioflag));
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int isdntrcioctl __P((dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p));
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#ifdef __NetBSD__
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const struct cdevsw isdntrc_cdevsw = {
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isdntrcopen, isdntrcclose, isdntrcread, nowrite, isdntrcioctl,
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nostop, notty, nopoll, nommap, nokqfilter,
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};
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#endif /* __NetBSD__ */
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/*---------------------------------------------------------------------------*
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* interface attach routine
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*---------------------------------------------------------------------------*/
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PDEVSTATIC void
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#ifdef __FreeBSD__
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isdntrcattach(void *dummy)
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#else
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isdntrcattach()
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#endif
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{
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int i;
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for(i=0; i < NISDNTRC; i++)
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{
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#if defined(__FreeBSD__)
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#if __FreeBSD__ < 4
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#ifdef DEVFS
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devfs_token[i]
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= devfs_add_devswf(&i4btrc_cdevsw, i, DV_CHR,
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UID_ROOT, GID_WHEEL, 0600,
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"isdntrc%d", i);
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#endif
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#else
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make_dev(&i4btrc_cdevsw, i,
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UID_ROOT, GID_WHEEL, 0600, "isdntrc%d", i);
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#endif
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#endif
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trace_queue[i].ifq_maxlen = IFQ_MAXLEN;
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device_state[i] = ST_IDLE;
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}
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}
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/*---------------------------------------------------------------------------*
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* isdn_layer2_trace_ind
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* ---------------------
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* is called from layer 1, adds timestamp to trace data and puts
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* it into a queue, from which it can be read from the i4btrc
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* device. The unit number in the trace header selects the minor
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* device's queue the data is put into.
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*---------------------------------------------------------------------------*/
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int
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isdn_layer2_trace_ind(struct l2_softc *sc, struct isdn_l3_driver *drv, i4b_trace_hdr *hdr, size_t len, unsigned char *buf)
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{
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struct mbuf *m;
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int isdnif, x;
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int trunc = 0;
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int totlen = len + sizeof(i4b_trace_hdr);
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MICROTIME(hdr->time);
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hdr->isdnif = sc->drv->isdnif;
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/*
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* for telephony (or better non-HDLC HSCX mode) we get
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* (MCLBYTE + sizeof(i4b_trace_hdr_t)) length packets
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* to put into the queue to userland. because of this
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* we detect this situation, strip the length to MCLBYTES
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* max size, and infor the userland program of this fact
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* by putting the no of truncated bytes into hdr->trunc.
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*/
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if(totlen > MCLBYTES)
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{
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trunc = 1;
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hdr->trunc = totlen - MCLBYTES;
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totlen = MCLBYTES;
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}
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else
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{
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hdr->trunc = 0;
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}
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/* set length of trace record */
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hdr->length = totlen;
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/* check valid interface */
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if((isdnif = hdr->isdnif) > NISDNTRC)
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{
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printf("i4b_trace: get_trace_data_from_l1 - isdnif > NISDNTRC!\n");
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return(0);
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}
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/* get mbuf */
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if(!(m = i4b_Bgetmbuf(totlen)))
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{
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printf("i4b_trace: get_trace_data_from_l1 - i4b_getmbuf() failed!\n");
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return(0);
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}
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/* check if we are in analyzemode */
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if(analyzemode && (isdnif == rxunit || isdnif == txunit))
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{
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if(isdnif == rxunit)
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hdr->dir = FROM_NT;
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else
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hdr->dir = FROM_TE;
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isdnif = outunit;
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}
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if(IF_QFULL(&trace_queue[isdnif]))
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{
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struct mbuf *m1;
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x = splnet();
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IF_DEQUEUE(&trace_queue[isdnif], m1);
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splx(x);
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i4b_Bfreembuf(m1);
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}
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/* copy trace header */
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memcpy(m->m_data, hdr, sizeof(i4b_trace_hdr));
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/* copy trace data */
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if(trunc)
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memcpy(&m->m_data[sizeof(i4b_trace_hdr)], buf, totlen-sizeof(i4b_trace_hdr));
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else
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memcpy(&m->m_data[sizeof(i4b_trace_hdr)], buf, len);
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x = splnet();
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IF_ENQUEUE(&trace_queue[isdnif], m);
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if(device_state[isdnif] & ST_WAITDATA)
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{
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device_state[isdnif] &= ~ST_WAITDATA;
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wakeup((caddr_t) &trace_queue[isdnif]);
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}
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splx(x);
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return(1);
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}
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/*---------------------------------------------------------------------------*
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* open trace device
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*---------------------------------------------------------------------------*/
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PDEVSTATIC int
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isdntrcopen(dev_t dev, int flag, int fmt, struct proc *p)
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{
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int x;
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int unit = minor(dev);
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if(unit >= NISDNTRC)
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return(ENXIO);
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if(device_state[unit] & ST_ISOPEN)
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return(EBUSY);
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if(analyzemode && (unit == outunit || unit == rxunit || unit == txunit))
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return(EBUSY);
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x = splnet();
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device_state[unit] = ST_ISOPEN;
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splx(x);
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return(0);
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}
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/*---------------------------------------------------------------------------*
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* close trace device
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*---------------------------------------------------------------------------*/
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PDEVSTATIC int
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isdntrcclose(dev_t dev, int flag, int fmt, struct proc *p)
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{
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int isdnif = minor(dev);
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int x;
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if (analyzemode && (isdnif == outunit)) {
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l2_softc_t * rx_l2sc, * tx_l2sc;
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analyzemode = 0;
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outunit = -1;
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rx_l2sc = (l2_softc_t*)isdn_find_softc_by_isdnif(rxunit);
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tx_l2sc = (l2_softc_t*)isdn_find_softc_by_isdnif(txunit);
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if (rx_l2sc != NULL)
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rx_l2sc->driver->mph_command_req(rx_l2sc->l1_token, CMR_SETTRACE, TRACE_OFF);
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if (tx_l2sc != NULL)
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tx_l2sc->driver->mph_command_req(tx_l2sc->l1_token, CMR_SETTRACE, TRACE_OFF);
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x = splnet();
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device_state[rxunit] = ST_IDLE;
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device_state[txunit] = ST_IDLE;
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splx(x);
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rxunit = -1;
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txunit = -1;
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} else {
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l2_softc_t * l2sc = (l2_softc_t*)isdn_find_softc_by_isdnif(isdnif);
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if (l2sc != NULL) {
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l2sc->driver->mph_command_req(l2sc->l1_token, CMR_SETTRACE, TRACE_OFF);
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x = splnet();
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device_state[isdnif] = ST_IDLE;
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splx(x);
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}
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}
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return(0);
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}
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/*---------------------------------------------------------------------------*
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* read from trace device
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*---------------------------------------------------------------------------*/
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PDEVSTATIC int
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isdntrcread(dev_t dev, struct uio * uio, int ioflag)
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{
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struct mbuf *m;
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int x;
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int error = 0;
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int unit = minor(dev);
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if(!(device_state[unit] & ST_ISOPEN))
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return(EIO);
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x = splnet();
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while(IF_QEMPTY(&trace_queue[unit]) && (device_state[unit] & ST_ISOPEN))
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{
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device_state[unit] |= ST_WAITDATA;
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if((error = tsleep((caddr_t) &trace_queue[unit],
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TTIPRI | PCATCH,
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"bitrc", 0 )) != 0)
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{
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device_state[unit] &= ~ST_WAITDATA;
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splx(x);
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return(error);
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}
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}
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IF_DEQUEUE(&trace_queue[unit], m);
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if(m && m->m_len)
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error = uiomove(m->m_data, m->m_len, uio);
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else
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error = EIO;
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if(m)
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i4b_Bfreembuf(m);
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splx(x);
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return(error);
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}
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#if defined(__FreeBSD__) && defined(OS_USES_POLL)
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/*---------------------------------------------------------------------------*
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* poll device
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*---------------------------------------------------------------------------*/
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PDEVSTATIC int
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i4btrcpoll(dev_t dev, int events, struct proc *p)
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{
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return(ENODEV);
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}
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#endif
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/*---------------------------------------------------------------------------*
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* device driver ioctl routine
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*---------------------------------------------------------------------------*/
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PDEVSTATIC int
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isdntrcioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
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{
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int error = 0;
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int isdnif = minor(dev);
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i4b_trace_setupa_t *tsa;
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l2_softc_t * l2sc = (l2_softc_t*)isdn_find_softc_by_isdnif(isdnif);
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switch(cmd)
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{
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case I4B_TRC_SET:
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if (l2sc == NULL)
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return ENOTTY;
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l2sc->driver->mph_command_req(l2sc->l1_token, CMR_SETTRACE, (void *)*(unsigned long *)data);
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break;
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case I4B_TRC_SETA:
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tsa = (i4b_trace_setupa_t *)data;
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if(tsa->rxunit >= 0 && tsa->rxunit < NISDNTRC)
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rxunit = tsa->rxunit;
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else
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error = EINVAL;
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if(tsa->txunit >= 0 && tsa->txunit < NISDNTRC)
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txunit = tsa->txunit;
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else
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error = EINVAL;
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if(error)
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{
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outunit = -1;
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rxunit = -1;
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txunit = -1;
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}
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else
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{
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l2_softc_t * rx_l2sc, * tx_l2sc;
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rx_l2sc = (l2_softc_t*)(l2_softc_t*)isdn_find_softc_by_isdnif(rxunit);
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tx_l2sc = (l2_softc_t*)(l2_softc_t*)isdn_find_softc_by_isdnif(txunit);
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if (l2sc == NULL || rx_l2sc == NULL || tx_l2sc == NULL)
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return ENOTTY;
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outunit = isdnif;
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analyzemode = 1;
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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)));
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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)));
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}
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break;
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case I4B_TRC_RESETA:
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analyzemode = 0;
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outunit = -1;
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rxunit = -1;
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txunit = -1;
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break;
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default:
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error = ENOTTY;
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break;
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}
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return(error);
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}
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#endif /* NISDNTRC > 0 */
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