//arp cache mantainer by radix
//radix (at) ironik.org
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

main(int argc, char *argv[])
{
   char ping[30], arp[30], info[60], graph[50];
   int f=0, r=0, t=0,g;
   float perc;
   FILE *pd;

   if(argc < 2)
   {
      printf("usage %s gateway [ping_target]\nyou can specify other ping target if you don't want to use the gateway\n\n", argv[0]);
      exit(1);
   }

   sprintf(arp, "arp -d %s", argv[1]);
   sprintf(ping, "ping -t %s", argv[argc-1]);
   pd = popen(ping, "r");

   for(g=0;g < 48; g++) graph[g]=' ';
   graph[48] = '\0'; g=0;

   while(!feof(pd))
   {
      if(fgetc(pd) =='R')
         if(fgetc(pd)=='e')
         {
            if(fgetc(pd)=='q')
            {
               f++;
               if(g>47) {for(g=0;g < 48; g++) graph[g]=' '; g=0;}
               graph[g] = 'x';
               system(arp);
            }
            else
            {
               r++;
               if(g>47) {for(g=0;g < 48; g++) graph[g]=' '; g=0;}
               graph[g] = (char)2;
            }
            g++;t++;
            perc = r * 100.00 / t;
            system("clear");
            sprintf(info,"[total: %d] [replies: %d (%.1f%%)] [timeouts: %d (%.1f%%)", t, r, perc, f, 100-perc );
            printf("%s",info);
            for(perc=1;perc < (60 - strlen(info)); perc++) putchar(' ');
            printf("]\n");
            printf("[history: %s ]\n", graph);
         }
   }
}