/* $Id: isdn.c,v 1.10 2003/06/21 05:46:18 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 1.10  2003/06/21 05:46:18  reinelt * DVB client integrated * * Revision 1.9  2001/05/27 07:19:28  reinelt * * fixed a warning in pixmap.c * temporarily fixed a bug in isdn.c (ISDN_MAX_CHANNELS is no longer defined?) * fixed a bug in configure.in (--with-drivers=xyz did not work) * * 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>// Fixme: ISDN_MAX_CHANNELS seems undefined in recent kernels#ifndef ISDN_MAX_CHANNELS#define ISDN_MAX_CHANNELS 64#endif#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 (/dev/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;}