escribe un programa que haga pin a un servidor en linux

#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
 
int main(int argc, char* argv[])
{
   int i, sock;
   struct sockaddr_in server;
   struct hostent *hp;
   char buffer[1024];
 
   sock = socket(AF_INET, SOCK_STREAM, 0);
   if(sock < 0)
   {
      perror("Failed to create socket");
      return 1;
   }
 
   server.sin_family = AF_INET;
   hp = gethostbyname(argv[1]);
   if(!hp)
   {
      perror("Unknown host");
      return 2;
   }
 
   memcpy((char *)&server.sin_addr, (char *)hp->h_addr,