netclient.c
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/* Make the necessary includes and set up the variables. */
#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
int
main ()
{
int sockfd;
socklen_t len;
struct sockaddr_in address;
int result;
char ch = 'A';
/* Create a socket for the client. */
sockfd = socket (AF_INET, SOCK_STREAM, 0);
/* Name the socket, as agreed with the server. */
address.sin_family = AF_INET;
address.sin_addr.s_addr = inet_addr ("127.0.0.1");
address.sin_port = htons (9734);
len = sizeof (address);
/* Now connect our socket to the server's socket. */
result = connect (sockfd, (struct sockaddr *) &address, len);
if (result == -1)
{
perror ("oops: netclient");
exit (1);
}
/* We can now read/write via sockfd. */
write (sockfd, &ch, 1);
read (sockfd, &ch, 1);
printf ("char from server = %c\n", ch);
close (sockfd);
exit (0);
}