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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <linux/isdn.h>
#include "isdn.h"
#include "filter.h"
#include "lcd4linux.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) {
perror ("open(/dev/isdninfo) failed");
return 0;
}
if (read (fd, buffer, sizeof(buffer))==-1) {
perror ("read(/dev/isdninfo) failed");
fd=-1;
return 0;
}
if (close(fd)==-1) {
perror ("close(/dev/isdninfo) failed");
fd=-1;
return 0;
}
p=strstr(buffer, "usage:");
if (p==NULL) {
fprintf (stderr, "parse(/dev/isdninfo) failed: no usage line\n");
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)
{
static int fd=-2;
CPS cps[ISDN_MAX_CHANNELS];
double cps_i, cps_o;
int i;
*rx=0;
*tx=0;
if (fd==-1) return 0;
if (fd==-2) {
fd = open("/dev/isdninfo", O_RDONLY | O_NDELAY);
if (fd==-1) {
perror ("open(/dev/isdninfo) failed");
return 0;
}
}
if (ioctl(fd, IIOCGETCPS, &cps)) {
perror("ioctl(IIOCGETCPS) failed");
fd=-1;
return 0;
}
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);
return Usage();
}
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