port = from.Port
		}
	}
	if err == nil {
		addr = netip.AddrPortFrom(ip, uint16(port))
	}
	return n, addr, err
}

func (c *UDPConn) readMsg(b, oob []byte) (n, oobn, flags int, addr netip.AddrPort, err error) {
	switch c.fd.family {
	case syscall.AF_INET:
		var sa syscall.SockaddrInet4
		n, oobn, flags, err = c.fd.readMsgInet4(b, oob, 0, &sa)

func (c *UnixConn) ReadMsgUnix(b, oob []byte) (n, oobn, flags int, addr *UnixAddr, err error) {
	if !c.ok() {
		return 0, 0, 0, nil, syscall.EINVAL
	}
	n, oobn, flags, addr, err = c.readMsg(b, oob)
	if err != nil {
		err = &OpError{Op: "read", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
	}
	return
}

// WriteToUnix acts like [UnixConn.WriteTo] but takes a [UnixAddr].

		}
		*sa = *(fromSA.(*syscall.SockaddrInet6))
		return nil
	})
	return n, err
}

func (ffd *fakeNetFD) readMsg(p []byte, oob []byte, flags int) (n, oobn, retflags int, sa syscall.Sockaddr, err error) {
	if flags != 0 {
		return 0, 0, 0, nil, os.NewSyscallError("readMsg", syscall.ENOTSUP)
	}
	n, sa, err = ffd.readFrom(p)
	return n, 0, 0, sa, err
}

func (c *UDPConn) ReadMsgUDPAddrPort(b, oob []byte) (n, oobn, flags int, addr netip.AddrPort, err error) {
	if !c.ok() {
		return 0, 0, 0, netip.AddrPort{}, syscall.EINVAL
	}
	n, oobn, flags, addr, err = c.readMsg(b, oob)
	if err != nil {
		err = &OpError{Op: "read", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
	}
	return
}

// WriteToUDP acts like WriteTo but takes a UDPAddr.