/* Call bprobe to get the bottleneck available bandwidth
*/
#include "smrt.h"
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <time.h>
#include <stddef.h>
#include <stdlib.h>

/***** FUNCTION PROTOTYPES *****/

FILE *OpenFile2(char *fname, char *access_mode);

/***** PROGRAM's MAIN DRIVER *****/

void BprobeCall(char *listFileName)
{
  FILE *OUTFILE;
  FILE *Ifile;
  FILE *RFile;
  char sitename[100];
  char Ln[300];
  char PingInstruction[200];
  char *sites[100];
  float band[100];
  float TripTime[100];
  float min=0,average=0,max=0;
  float bandwidth;	// available bandwidth
  float times;	// round trip time
  int sitenum=0;
  int i=0;	
  int retry=0;	// how many times to probe 

  Ifile = OpenFile2(listFileName, "r");
  while (fscanf(Ifile,"%s %f %f\n",sitename,&bandwidth,&times) != EOF)
  {	
	printf("%s\n",sitename);	
	sites[sitenum]= malloc(strlen(sitename)+1);
	strcpy(sites[sitenum],sitename);	
	band[sitenum] = bandwidth;
	TripTime[sitenum] = times;
	
	
	// measure the bottleneck bandwidth
	bandwidth = -1.0;
	retry = 4; /* DISABLE RETRIES */
	while ((bandwidth <= 0.0) && (retry++ < 5)) {
		bandwidth = bprobe(sitename);
	}
	if (bandwidth > 0.0 && (band[sitenum] < bandwidth)) {
		band[sitenum] = bandwidth;
	}

	sitenum++;
	
  }	

  fclose(Ifile);   


  OUTFILE = OpenFile2(listFileName, "w");  
  while (i<sitenum)
  {
	printf("\n%s %f %f\n",sites[i],band[i],TripTime[i]);	
    fprintf(OUTFILE,"%s %f %f\n",sites[i],band[i],TripTime[i]);
	  i++;
  }
  


  fclose(OUTFILE);
} /* end main() */

/***** FUNCTION DEFINITIONS ******/  

/* This funcction returns a pointer to the opened file named as a the 1st */
/* argument for the access mode of the second argument. */
FILE *OpenFile2( char *fname, char *access_mode)
{
  FILE *fp;

  if((fp=fopen(fname, access_mode)) == NULL)
    fprintf(stderr,"\nError openong file %s with access mode %s\n",
      fname, access_mode);
  return fp;
} /* OpenFile2 */