UDP Client (C)

#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>

int main(){
  int sock, portNum, nBytes;
  char buffer[1024];
  struct sockaddr_in serverAddr;
  socklen_t addr_size;

  /** Crea socket **/
  sock = socket(PF_INET, SOCK_DGRAM, 0);

  /** Configurazione dati server **/
  serverAddr.sin_family = AF_INET;
  serverAddr.sin_port = htons(6666);
  serverAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
  memset(serverAddr.sin_zero, '\0', sizeof serverAddr.sin_zero);
  addr_size = sizeof serverAddr;


    printf("Scrivi la frase da inviare al server: ");
    fgets(buffer,1024,stdin);
    printf("Hai scritto: %s",buffer);

    nBytes = strlen(buffer) + 1;

    /** Invia messaggio **/
    sendto(sock,buffer,nBytes,0,(struct sockaddr *)&serverAddr,addr_size);

  close (sock);

  return 0;
}