forms.c

802.11仿真源码 对分析RSSI很有用的

/*
forms.c

Written by: Peter Tzannes

INPUT          ->    OUTPUT
strength'i'.txt   
  &            ->    analysed'i'.txt
form'i'.csv

where:
  forms'i'.txt is the output of the strength.c file
  form'i'.csv is the csv form file
and 'i' is an integer which represents different sample of data

  The first few lines identify
  - the confidence level
  - the number of operating WLANs
  - if the sample had ducted air-conditioning
  - the number of people present while doing the experiment

  This program calculates and writes to the output file for each MP:
  - the distance from the router to all MP
  - the room type 
  - the angle of incident between the router and MP
  - the information form the strength.c program

OUTPUT
 The output is in the format:
 Room> <MP> <Distance> <RSSI> < Number of excess packets > 
 <Number of total received packets> <Room number> 
 <Angle of Incident> and the <PER>
   where "<>" identifies the use of a column. 
*/


#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <math.h>

#define MAXLINE 40
#define KISLINE 350 //max line in Kismet form
#define MAX_FIELD_SIZE 8
#define pi 3.14159

int router_found = 0; //variable used to determine if the experimental router was found
int low, high;        //the lowest and highest levels used in experiment
int z = 0;            //global analyses counter
int once = 0;         //ensure himidity is only run once 
float routerroomx, routerroomy, routerroomz; //router position coordinates of the room
double routerposx, routerposy, routerposz;   //router position cordinates relative to the origin



//empty the contents of array tmp
int empty(char *tmp)
{
  int j;
  for(j = 0 ; j<= MAX_FIELD_SIZE; j++) 
    tmp[j] = 0;
  
  return(0);
}


//delete all commas in student number
int studnum(char *x) // the inital contents are x = #,1234567...
{
  int i,j;
  char temp[BUFSIZ];
  
  if (x[2] != 'z')
    {
      for(i = 0, j = 2; i <= strlen(x); i++, j++)
	  temp[i] = x[j];      
      temp[7] = '\0';
      strcpy(x, temp);
    }
  else // if students put the z in their student number
    {
      for(i = 0, j = 3; i <= strlen(x); i++, j++)
	{
	  temp[i] = x[j];      
	}
      temp[7] = '\0';
      strcpy(x, temp);
    }
  return(0);
}

//delete commas in post code
int postcode(char *x) // initial contents are x = ,1234...
{
  int i,j;
  char temp[BUFSIZ];

  for(i = 0, j = 5; i <= strlen(x); i++, j++)
    {
      temp[i] = x[j];      
    }
  temp[4] = '\0';
  strcpy(x, temp);
  return(0);
}

//Determines the number of floors used in the expeirment, using the data in the buildings form.
//The highest floor is written to the variable floor, while the lowest floor is written to a variable low.
int levelhouse(FILE *in)
{
  char room[BUFSIZ], line[BUFSIZ];
  int inc;

  rewind(in);
  for(inc = 0; inc < 6; inc++) //skip over first 6 lines
      fgets(line, 150, in);
  sscanf(line, "%s", room);
  low = room[1];
  fgets(line, 150, in);
  sscanf(line, "%s", room);
  high = room[1];
  return(0);
}

//This function needs the relevent form'i'.txt file created by the program strength.c, 
//where the 'i' is the unique attribute number for that form. 
//The program then creates
//Also calculates the angle of incidence, from router to MP and writes it to the file,
//where 0 degrees means the router was directly op top of the MP. 
int form(int arg, int ROOM, int MP, FILE *out, int TMP, float distance, int rm_type, float displacementz)
{
  FILE *fw;
  char temp[BUFSIZ];    //a temp string
  char line[MAXLINE];
  const char *final = "strength";
  int room, mp, pkt_over, pkt_total;
  //int pkt_lost, pkt_recv;
  float rssi; 
  float oldrssi = -1.0, angle = 0; 
  float per = 0;
  float humidity = 0;

  sprintf(temp,"%s%d.txt",final,arg); //form'i'.txt

  fw = fopen(temp, "r");  
  if ((fw) == NULL)
      exit(1);

  if(once == 0) // global once counter
  {
    fgets(line, MAXLINE, fw);
    sscanf(line,"%f\n", &humidity);
    fprintf(out,"%f\n",humidity);
    once++;
  }
  while(!feof(out))
    {
      fgets(line, MAXLINE, fw);
      char *tmp;
      tmp = (char *)malloc(60); 
      if(strcmp(line, "END") == 0)
	return(0);
      if(strcmp(line, "EMPTY") == 0)
	return(0);
      sscanf(line,"%g,%d,%d,%d,%d,%f\n", &per, &room, &mp, &pkt_over, &pkt_total, &rssi);
      if(ROOM == 0)        //ROOM will be 0 if a line is not of the form ROOM MP RSSI
        return(0);
      if((ROOM == room) && (MP == mp))
      {	
	if(displacementz >= 0)
	  angle = (acos(displacementz/distance))*(180/pi); 
	else
	  angle = (asin(displacementz/distance))*(180/pi)+ 90;
        fprintf(out, "%d %d %f %f %d %d %d %f %g\n", room, mp, distance, rssi, pkt_over, pkt_total, rm_type, angle, per);//printf output to file	 
      }
      oldrssi = rssi;     //backup the rssi value. 
      }
  fclose(fw);
  return(0);
}


//This function determines the number of WLANs detected by Kismet, and then subtracts this from the 
//number of WLANs disabled during the experiment as recorded in the csv file. 
//It then writes number of operating WLANs to the output file
int kismet(int arg, FILE *out, FILE *in)
{

  FILE *read;
  char line[KISLINE]; 
  char temp[10];    //a temp string
  const char *kis = "Kismet";
  int i = 0, j = 0, counter = 0;

  sprintf(temp,"%s%d.csv",kis,arg); //form'i'.txt

  read = fopen(temp, "r");  
  if ((read) == NULL)
      exit(1);

  fgets(line, KISLINE, read); //skip over first line
  while(!feof(read))
    {
      fgets(line, KISLINE, read);
      if(strlen(line) > 2) //skip counter over blank line
	i++;
    }

  //find '802.11 disabled' in form
  rewind(in);
  while(j<18)
  {
    fgets(line, 100, in);   
    j++;
  }

  //deals with the first line of the 802.11 disabled section
  fgets(line, KISLINE, in);    
  if(line[16] == '0')
    counter++;
  else
    i--;
  
  j = 0;
  //deals with the rest
  while(counter != 1)
  {
    fgets(line,KISLINE, in);    
    if(j == 4) //have recorded all fields in 802.11 disabled section
    {
      fprintf(out,"WLAN: 0%d \n",i);
      return(0);
    }
    if(line[1] == '0')
      counter++;
    else
      {
	j++;
	i--;
      }
  }

  if((i >= 0) && (i <= 9)) //make number into 2 digits
    fprintf(out,"WLAN: 0%d \n",i);
  else
    fprintf(out,"WLAN: %d \n",i);

  return(0);
}

//Determines if the dwelling has airconditioning and the number of people
//that were recorded in the spreadsheet, writes the result to the output file
int aircon_people(int arg, FILE *out, FILE *in)
{
  char line[KISLINE];
  int j = 0;
  int yes = 1, no = 0;

  rewind(in);
  while(j < 15)
  {
    fgets(line,KISLINE, in);     
    j++;
  }
  fgets(line, KISLINE, in);  
  if(line[7] == '2')
    fprintf(out,"AIR: %d \n",yes);
  else
    fprintf(out,"AIR: %d \n",no);
  
  fgets(line, KISLINE, in); 
  if(line[9] == 0)   //if didn't fill in then assume only 1 person in dwelling
    fprintf(out,"PEOPLE: %d \n",yes); 
  else
    fprintf(out,"PEOPLE: %c \n",(line[9] - 1)); //greater than 9 people in dwelling are both set to 0,rest correspond to output number
 
  return(0);
}
//This function is used to start from the beginning of the file, and find the beginning of the rooms. 
//Once found, all variables in that line are assigned a unique variable, so can be manipulated.
//Depending on the fields set in the function call, either the coordinates or height of the router will be determined.
int scan(int level, float xpos, float ypos, FILE *in, FILE *out, int coord, int height, int roomcoord, int confidence)
{
  char room[BUFSIZ], line[BUFSIZ], temp[BUFSIZ];
  int count = 0;
  int inc; // major loop counter
  int a,b,c,d,e,f,g,h,i,j,k, single,length,templ, test; //variables
  float l,m,n,o,p; //variables
  int roomcoordtemp = 1; //temp integer
  float x,y,z; //coordinates
  int perheight = 1.0; //height of the user when holding laptop
  float displacementx, displacementy, displacementz; //displacement from MP to router at coordinates x,y,z 
  float dismag; //magnitude from the router
  int one = 1;

  rewind(in);

  for(inc = 0; inc < 140; inc++)
    {
      a=b=c=d=e=f=g=h=i=j=k=-1;
      l=m=n=o=p=-1.0;
      fgets(line, BUFSIZ, in);
      count =(sscanf(line, "%s", room));
      if (strcmp(room,",,,Width") == 0)
	{
	  for(inc = 0; inc<150;inc++)
	    {
	      fgets(line, BUFSIZ, in);
	      count =(sscanf(line, "%d,%d", &a,&b)); // read in first 2 numbers
	      for(single = 0, count = 0, test = 0; single <= strlen(line); single++) //skip over works
		{
		  if (line[single] == ',')
		      count++;
		  if((count == 3) && (test == 0))
		    {
		      test = 1;
		      for(length = single, templ = 0; length <= strlen(line); length++, templ++)
			{
			  temp[templ] = line[length];
			}
		    }  
		}
	      //read in all other variables
	      count =(sscanf(temp, ",%f,%f,%f,%f,%d,%d,%d,%d,%d,%f,%d,%d,%d,%d", &l,&m,&n,&o,&c,&d,&e,&f,&g,&p,&h,&i,&j,&k)); //elements from a line
	      if(coord == 1)       //coordinates of router need to be determined
		{	  	    	  
		  if(a == level)
		    {
		      routerroomx = n; //x coord of router
		      routerroomy = o; //y coord of router
		      if((xpos > l) || (ypos > o)) //students that meausred the router from the origin of the house
			{
			  routerroomx = xpos - n ; //position from origin minus coordinates of foom
			  routerroomy = ypos - o;  //same method
			  if ((routerroomx < 0) || (routerroomy < 0)) //if less than 0, then made a mistake
			    {
			      routerroomx = n;
			      routerroomy = o;
			    }
			  return(0);
			}
		      return(0);
		    }
		}
	      else if(height == 1) //height needs to be determined
		{