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/* $Id: isdn.c,v 1.8 2000/08/10 18:42:20 reinelt Exp $
*
* ISDN specific functions
*
* Copyright 1999, 2000 by Michael Reinelt (reinelt@eunet.at)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
* $Log: isdn.c,v $
* Revision 1.8 2000/08/10 18:42:20 reinelt
*
* fixed some bugs with the new syslog code
*
* Revision 1.7 2000/08/10 09:44:09 reinelt
*
* new debugging scheme: error(), info(), debug()
* uses syslog if in daemon mode
*
* Revision 1.6 2000/04/15 11:56:35 reinelt
*
* more debug messages
*
* Revision 1.5 2000/03/13 15:58:24 reinelt
*
* release 0.9
* moved row parsing to parser.c
* all basic work finished
*
* Revision 1.4 2000/03/10 17:36:02 reinelt
*
* first unstable but running release
*
* Revision 1.3 2000/03/07 11:01:34 reinelt
*
* system.c cleanup
*
* Revision 1.2 2000/03/06 06:04:06 reinelt
*
* minor cleanups
*
*/
/*
* exported functions:
*
* Isdn (int *rx, int *tx, int *usage)
* returns 0 if ok, -1 if error
* sets *usage to all channels USAGE or'ed together
* sets received/transmitted bytes in *rx, *tx
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <linux/isdn.h>
#include "debug.h"
#include "isdn.h"
#include "filter.h"
typedef struct {
unsigned long in;
unsigned long out;
} CPS;
static int Usage (void)
{
static int fd=0;
char buffer[4096], *p;
int i, usage;
if (fd==-1) return 0;
fd=open ("/dev/isdninfo", O_RDONLY | O_NDELAY);
if (fd==-1) {
error ("open(/dev/isdninfo) failed: %s", strerror(errno));
return 0;
}
if (read (fd, buffer, sizeof(buffer))==-1) {
error ("read(/dev/isdninfo) failed: %s", strerror(errno));
fd=-1;
return 0;
}
if (close(fd)==-1) {
error ("close(/dev/isdninfo) failed: %s", strerror(errno));
fd=-1;
return 0;
}
p=strstr(buffer, "usage:");
if (p==NULL) {
error ("parse(/dev/isdninfo) failed: no usage line");
fd=-1;
return 0;
}
p+=6;
usage=0;
for (i=0; i<ISDN_MAX_CHANNELS; i++) {
usage|=strtol(p, &p, 10);
}
return usage;
}
int Isdn (int *rx, int *tx, int *usage)
{
static int fd=-2;
CPS cps[ISDN_MAX_CHANNELS];
double cps_i, cps_o;
int i;
*usage=0;
*rx=0;
*tx=0;
if (fd==-1) return -1;
if (fd==-2) {
fd = open("/dev/isdninfo", O_RDONLY | O_NDELAY);
if (fd==-1) {
error ("open(/dev/isdninfo) failed: %s", strerror(errno));
return -1;
}
debug ("open (/proc/isdninfo)=%d", fd);
}
if (ioctl(fd, IIOCGETCPS, &cps)) {
error("ioctl(IIOCGETCPS) failed: %s", strerror(errno));
fd=-1;
return -1;
}
cps_i=0;
cps_o=0;
for (i=0; i<ISDN_MAX_CHANNELS; i++) {
cps_i+=cps[i].in;
cps_o+=cps[i].out;
}
*rx=(int)smooth("isdn_rx", 1000, cps_i);
*tx=(int)smooth("isdn_tx", 1000, cps_o);
*usage=Usage();
return 0;
}
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