//created by Dr. Ramsey
//updated 1/27/10
//edits on 9/11/15

#include <sys/types.h>
#include <sys/socket.h>  //for connection and various
#include <netdb.h>
#include <string.h>//for memset
#include <stdio.h>//perror
#include <unistd.h>
#include<arpa/inet.h> //inet_pton and ntop

// connect returns 0 on success


void recvMsg(int sf, char *buf, int size_of_buf) {
  int left = size_of_buf; 
  int used = 0;
  used =  recv(sf,buf,left,0);
  if(used < 0 ) perror("recv?: ");
  printf("Recv'd: (%d) :", used);
  for(int i = 0; i < used; i++)
    printf("%c",buf[i]);
  printf("\n");
}



int main()
{
  char hostname[] = "127.0.0.1";
  int portnumber = 23000;

  //sf is the socket file descriptor, it is what is important here

  sockaddr_in a2;
  int sf = socket(AF_INET, SOCK_STREAM, 0);
  bzero(&a2, sizeof(a2));
  a2.sin_family = AF_INET;
  inet_pton(AF_INET, hostname, &a2.sin_addr);
  a2.sin_port = htons(portnumber);
  

  if(connect(sf, (sockaddr *)&a2, sizeof(a2)) < 0)
    perror("connect: ");
  else
    {
      printf("Connection success\n");
      char buf[128];

      recvMsg(sf,buf,128);
      printf("Input string to send (<128chars): ");

      scanf("%s",buf);
      int s = send(sf,buf,strlen(buf),0);
      if( s < 0 ) perror("send?: ");
      
      
    }
}