rb_w32_ioctlsocket  251 include/ruby/win32.h extern int    WSAAPI rb_w32_ioctlsocket(int, long, u_long *);
rb_w32_ioctlsocket  644 include/ruby/win32.h #define ioctlsocket(s, c, a)	rb_w32_ioctlsocket(s, c, a)