func RecvfromInet4(fd int, p []byte, flags int, from *syscall.SockaddrInet4) (int, error)
func RecvfromInet6(fd int, p []byte, flags int, from *syscall.SockaddrInet6) (n int, err error)
func SendtoInet4(fd int, p []byte, flags int, to *syscall.SockaddrInet4) (err error)
func SendtoInet6(fd int, p []byte, flags int, to *syscall.SockaddrInet6) (err error)
func SendmsgNInet4(fd int, p, oob []byte, to *syscall.SockaddrInet4, flags int) (n int, err error)
func SendmsgNInet6(fd int, p, oob []byte, to *syscall.SockaddrInet6, flags int) (n int, err error)
func RecvmsgInet4(fd int, p, oob []byte, flags int, from *syscall.SockaddrInet4) (n, oobn int, recvflags int, err error)
func RecvmsgInet6(fd int, p, oob []byte, flags int, from *syscall.SockaddrInet6) (n, oobn int, recvflags int, err error)