Client

gistfile1.c

#include <stdio.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <netinet/in.h>

#define BUFFSIZE 32
void Die(char *mess) { perror(mess); exit(1); }

int main (int argc, char *argv[])
{
  int sock;
  struct sockaddr_in echoserver;
  char buffer[BUFFSIZE];
  unsigned int echolen;
  int received = 0;

  if (argc != 4)
    {
      fprintf(stderr, "USAGE: client <server_ip> <word> <port>\n");
      exit(1);
    }

  if ((sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
    {
      Die("Failed to create socket");
    }

  printf("Sock is : %i\n", sock);
 
  memset (&echoserver, 0, sizeof(echoserver));
  echoserver.sin_family = AF_INET;
  echoserver.sin_addr.s_addr = inet_addr(argv[1]);
  echoserver.sin_port = htons(atoi(argv[3]));

  if (connect(sock, (struct sockaddr *) &echoserver, sizeof(echoserver)) < 0)
    {
      Die("Failed to connect with server");
    }

  echolen = strlen(argv[2]);
  if (send(sock, argv[2], echolen, 0) != echolen)
    {
      Die("Mismatch in number of sent bytes");
    }

  fprintf(stdout, "Received: ");
  
  while (received < echolen)
    {
      int bytes = 0;
      
      if ((bytes = recv(sock, buffer, BUFFSIZE-1, 0)) < 1)
	{
	  Die("Failed to receive bytes from server");
	}
      received += bytes;
      buffer[bytes] = '\0';
      fprintf(stdout, buffer);
    }

  fprintf(stdout, "\n");
  close(sock);
  exit(0);
}