#include "w_main.h"

/**
 * File name : w_client.cpp
 * Author    : Edison Chindrawly
 * Course    : CSCI 4330 TCP/IP Fall 2001
 * Descp     : TCP Client collect information on
 *             the current load of the csp server.
 *             It needs Port number that user assigned
 *             from the command line. It also requires
 *             that w_server's program is running in
 *             all 10 CSP machine before w_client can
 *             execute
 * Usage     : ./w_client 1080
 */
void main(int argc, char *argv[])
{
 if(argc != 2)
 {
   cout<<"Usage: ./w_client <port>"<<endl;
   exit(0);
 }

 int port = atoi(argv[1]);
 int socks;

 struct hostent *host_entry;
 struct sockaddr_in server;
 char message[400];
 

 char arrayOfCsp[10][19] = {"csp01.csci.unt.edu",
                            "csp02.csci.unt.edu",
                            "csp03.csci.unt.edu",
                            "csp04.csci.unt.edu",
                            "csp05.csci.unt.edu",
                            "csp06.csci.unt.edu",
                            "csp07.csci.unt.edu",
                            "csp08.csci.unt.edu",
                            "csp09.csci.unt.edu",
                            "csp10.csci.unt.edu" }; 

 for(int i=0; i < 10; i++)
 {
  if((socks=socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1)
    cerr<<"ERROR: opening socket"<<endl;

  if((host_entry = gethostbyname(arrayOfCsp[i])) == NULL)
    cerr<<"ERROR: hostname"<<endl;

  memset(&server,0,sizeof(server));
  server.sin_family=AF_INET;
  server.sin_port=htons(port);
  server.sin_addr.s_addr = *((unsigned long *)host_entry->h_addr);

  if(connect(socks,(struct sockaddr *)&server, sizeof(server)) < 0)
    cerr<<"ERROR: connect"<<endl;

  if(recv(socks,message,sizeof(message),0)< 0)
    cerr<<"ERROR: receive"<<endl;
  cout<<arrayOfCsp[i]<<" load average: "<<message<<endl;
  close(socks);
 }
}