/* counter.c */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>

int main()
{
    unsigned dummy, ibytes, obytes;
    FILE *f;
    char line[1024];

    previbytes = prevobytes = 0;
    while (1) {
        time_t t = time(0);
        struct tm *lt = localtime(&t);
        if (lt->tm_sec == 0 && lt->tm_min % 10 == 0) {
            /* every 10 minutes */
            system("/sbin/ipchains -L -v -x -Z | /bin/grep eth1 >/tmp/counter.out");
            f = fopen("/tmp/counter.out", "r");
            if (f == NULL) break;
            if (fgets(line, sizeof line, f) == NULL) break;
            sscanf(line, "%u%u", &dummy, &ibytes);
            if (fgets(line, sizeof line, f) == NULL) break;
            sscanf(line, "%u%u", &dummy, &obytes);
            fclose(f);
            f = fopen("/usr/local/apache/htdocs/traffic.dat", "a");
            if (f == NULL) break;
            fprintf(f, "%04d-%02d-%02d %02d:%02d %10u %10u\n",
                    lt->tm_year + 1900, lt->tm_mon + 1, lt->tm_mday,
                    lt->tm_hour, lt->tm_min,
                    ibytes, obytes);
            fclose(f);
        }
        sleep(1);
    }
    return 0;
}