/*
 *  client.c
 *
 *  Created by Miguel Lastras on 2/14/13.
 *
 *  Sample program (client)
 *  Send a string to a server using TCP
 *
 */


// Standard libraries
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

// Socket-related libraries
#include <sys/types.h>
#include <sys/socket.h> 
#include <netdb.h>

#define MAX_LINE_SIZE 50

void print_usage(){
  fprintf(stderr, "Usage: ./client [hostname] [port]\n");
  fprintf(stderr, "Example: ./client 192.168.0.2 4845\n\n");
}
 
void check_args(int argc, char *argv[]){
  if( argc != 3 ) {
    print_usage();
	exit(1);
  }
}

int main(int argc, char *argv[])
{

  struct addrinfo hints;
  struct addrinfo *serverInfo;
  
  // Check arguments and exit if they are not well constructed
  check_args(argc, argv);
  
  // Fill the 'hints' structure
  memset( &hints, 0, sizeof(hints) );
  hints.ai_family   = AF_INET;     // Use IPv4 address
	hints.ai_socktype = SOCK_STREAM; // TCP sockets
  
  // Get the address information of the server.
  // argv[1] is the address, argv[2] is the port
  getaddrinfo(argv[1], argv[2], &hints, &serverInfo);
  
  // Create a socket to communicate with the server
  int socketFD = socket( serverInfo->ai_family, serverInfo->ai_socktype, serverInfo->ai_protocol );
  
  // Connect to the server (only for TCP)
  connect(socketFD, serverInfo->ai_addr, serverInfo->ai_addrlen);
  
  /////////////////////////////////////
  ///// CONNECTION IS ESTABLISHED /////
  /////                           /////
  /////     USEFUL WORK HERE      /////
  /////                           /////
  /////////////////////////////////////
  
  // Free the address info struct and close the socket
  freeaddrinfo(serverInfo);
  close(socketFD);
  
  return EXIT_SUCCESS;
}