sockets.c

/* sockets.c */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>

/* connect() import */
#include <unistd.h>

/* inet_add imports */
#include <netinet/in.h>

#define IP_ADDRESS "172.217.170.196" /* www.google.com */
#define PORT 80 /* http */


int main()
{
 int s;
struct sockaddr_in sock;
char buf[512];
char *data;

data =  "HEAD / HTTP/1.0\n\n";

s = socket(AF_INET, SOCK_STREAM, 0);
if ( s < 0 ){
  printf("socket() error\n");
  return -1;
}  

sock.sin_addr.s_addr = inet_addr(IP_ADDRESS);
sock.sin_port = htons(PORT);
sock.sin_family = AF_INET;

if (connect(s, (struct sockaddr *)&sock, sizeof(struct sockaddr_in)) != 0){
  printf("connect() error \n");
  close(s);

  return -1;
} 

write(s, data, strlen(data));
read(s, buf, 511);

close(s);

printf("\n%s", buf);

return 0;

}