# define IPV6_V6ONLY 27
# endif
#else
+# include <sys/types.h>
+# include <unistd.h>
# include <sys/socket.h>
-# ifdef HAVE_NETINET_IN_H
-# include <netinet/in.h>
-# endif
-# ifdef HAVE_ARPA_INET_H
-# include <arpa/inet.h>
-# endif
+# include <netinet/in.h>
# include <netdb.h>
# define net_errno errno
#endif
# define SHUT_WR 1
# define SHUT_RDWR 2
# endif
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
# define net_Close( fd ) (void)close (fd)
#endif