java-native-access · dbwiddis · May 20, 2026 · May 17, 2026 · May 19, 2026
diff --git a/CHANGES.md b/CHANGES.md
@@ -13,6 +13,7 @@ Features
 * [#1720](https://github.com/java-native-access/jna/pull/1720): Add `groupCount` and `groupMasks` fields to `CACHE_RELATIONSHIP` in `c.s.j.p.win32.WinNT`, matching the updated Windows struct layout - [@dbwiddis](https://github.com/dbwiddis).
 * [#1719](https://github.com/java-native-access/jna/pull/1719): Add `CoreGraphics` to `c.s.j.p.mac` with Quartz Window Services and Display Services bindings; implement `getAllWindows()` in `MacWindowUtils` - [@dbwiddis](https://github.com/dbwiddis).
 * [#1723](https://github.com/java-native-access/jna/pull/1723): Add `ProcFdInfo`, `InSockInfo`, `TcpSockInfo`, `proc_pidfdinfo`, `statfs64`, and `vm_deallocate` to `c.s.j.p.mac.SystemB` - [@dbwiddis](https://github.com/dbwiddis).
+* [#1725](https://github.com/java-native-access/jna/pull/1725): Add `BluetoothApis` to `c.s.j.p.win32` providing Bluetooth device and radio enumeration via `BluetoothFindFirstRadio`, `BluetoothFindFirstDevice`, and related functions - [@dbwiddis](https://github.com/dbwiddis).
 
 Bug Fixes
 ---------

diff --git a/contrib/platform/src/com/sun/jna/platform/win32/BluetoothApis.java b/contrib/platform/src/com/sun/jna/platform/win32/BluetoothApis.java
@@ -0,0 +1,271 @@
+/* Copyright (c) 2026 Daniel Widdis, All Rights Reserved
+ *
+ * The contents of this file is dual-licensed under 2
+ * alternative Open Source/Free licenses: LGPL 2.1 or later and
+ * Apache License 2.0. (starting with JNA version 4.0.0).
+ *
+ * You can freely decide which license you want to apply to
+ * the project.
+ *
+ * You may obtain a copy of the LGPL License at:
+ *
+ * http://www.gnu.org/licenses/licenses.html
+ *
+ * A copy is also included in the downloadable source code package
+ * containing JNA, in file "LGPL2.1".
+ *
+ * You may obtain a copy of the Apache License at:
+ *
+ * http://www.apache.org/licenses/
+ *
+ * A copy is also included in the downloadable source code package
+ * containing JNA, in file "AL2.0".
+ */
+package com.sun.jna.platform.win32;
+
+import com.sun.jna.Native;
+import com.sun.jna.Structure;
+import com.sun.jna.Structure.FieldOrder;
+import com.sun.jna.Union;
+import com.sun.jna.platform.win32.WinBase.SYSTEMTIME;
+import com.sun.jna.platform.win32.WinNT.HANDLE;
+import com.sun.jna.ptr.PointerByReference;
+import com.sun.jna.win32.StdCallLibrary;
+import com.sun.jna.win32.W32APIOptions;
+
+/**
+ * Provides mappings for the Windows Bluetooth API functions from {@code BluetoothApis.dll}.
+ *
+ * @see <a href="https://learn.microsoft.com/en-us/windows/win32/api/bluetoothapis/">BluetoothApis.h</a>
+ */
+public interface BluetoothApis extends StdCallLibrary {
+
+    /** Instance of BluetoothApis. */
+    BluetoothApis INSTANCE = Native.load("BluetoothApis", BluetoothApis.class, W32APIOptions.DEFAULT_OPTIONS);
+
+    /** Maximum Bluetooth device name length. */
+    int BLUETOOTH_MAX_NAME_SIZE = 248;
+
+    /**
+     * The {@code BLUETOOTH_ADDRESS} structure provides the address of a Bluetooth device. The address is stored as
+     * either a {@code BTH_ADDR} (unsigned 64-bit integer) or a 6-byte array.
+     *
+     * @see <a href=
+     *      "https://learn.microsoft.com/en-us/windows/win32/api/bluetoothapis/ns-bluetoothapis-bluetooth_address_struct">BLUETOOTH_ADDRESS</a>
+     */
+    class BLUETOOTH_ADDRESS extends Union {
+        /** The Bluetooth address as a 64-bit unsigned integer (only lower 48 bits used). */
+        public long ullLong;
+        /** The Bluetooth address as a 6-byte array in network byte order. */
+        public byte[] rgBytes = new byte[6];
+
+        /**
+         * Gets the address as a long.
+         *
+         * @return the address
+         */
+        public long getAddress() {
+            setType("ullLong");
+            read();
+            return ullLong;
+        }
+
+        /**
+         * Gets the address as a 6-byte array.
+         *
+         * @return the address bytes
+         */
+        public byte[] getBytes() {
+            setType("rgBytes");
+            read();
+            return rgBytes;
+        }
+    }
+
+    /**
+     * The {@code BLUETOOTH_DEVICE_INFO} structure provides information about a Bluetooth device.
+     *
+     * @see <a href=
+     *      "https://learn.microsoft.com/en-us/windows/win32/api/bluetoothapis/ns-bluetoothapis-bluetooth_device_info_struct">BLUETOOTH_DEVICE_INFO</a>
+     */
+    @FieldOrder({ "dwSize", "Address", "ulClassofDevice", "fConnected", "fRemembered", "fAuthenticated", "stLastSeen",
+            "stLastUsed", "szName" })
+    class BLUETOOTH_DEVICE_INFO extends Structure {
+        /** Size of the structure, in bytes. Must be set before calling any function. */
+        public int dwSize;
+        /** Address of the device. */
+        public BLUETOOTH_ADDRESS Address;
+        /** Class of Device (CoD) of the device. */
+        public int ulClassofDevice;
+        /** Whether the device is connected. */
+        public boolean fConnected;
+        /** Whether the device is a remembered device. Not all remembered devices are authenticated. */
+        public boolean fRemembered;
+        /** Whether the device is authenticated, paired, or bonded. All authenticated devices are remembered. */
+        public boolean fAuthenticated;
+        /** Last time the device was seen. */
+        public SYSTEMTIME stLastSeen;
+        /** Last time the device was used. */
+        public SYSTEMTIME stLastUsed;
+        /** Name of the device. */
+        public char[] szName = new char[BLUETOOTH_MAX_NAME_SIZE];
+
+        /** Creates a new instance and sets {@code dwSize}. */
+        public BLUETOOTH_DEVICE_INFO() {
+            dwSize = size();
+        }
+    }
+
+    /**
+     * The {@code BLUETOOTH_DEVICE_SEARCH_PARAMS} structure specifies search criteria for Bluetooth device searches.
+     *
+     * @see <a href=
+     *      "https://learn.microsoft.com/en-us/windows/win32/api/bluetoothapis/ns-bluetoothapis-bluetooth_device_search_params">BLUETOOTH_DEVICE_SEARCH_PARAMS</a>
+     */
+    @FieldOrder({ "dwSize", "fReturnAuthenticated", "fReturnRemembered", "fReturnUnknown", "fReturnConnected",
+            "fIssueInquiry", "cTimeoutMultiplier", "hRadio" })
+    class BLUETOOTH_DEVICE_SEARCH_PARAMS extends Structure {
+        /** Size of the structure, in bytes. */
+        public int dwSize;
+        /** Whether to return authenticated devices. */
+        public boolean fReturnAuthenticated;
+        /** Whether to return remembered devices. */
+        public boolean fReturnRemembered;
+        /** Whether to return unknown devices. */
+        public boolean fReturnUnknown;
+        /** Whether to return connected devices. */
+        public boolean fReturnConnected;
+        /** Whether to issue a new inquiry. */
+        public boolean fIssueInquiry;
+        /** Timeout for the inquiry in increments of 1.28 seconds. Maximum value is 48. */
+        public byte cTimeoutMultiplier;
+        /** Handle to the radio on which to perform the inquiry. Set to {@code null} for all radios. */
+        public HANDLE hRadio;
+
+        /** Creates a new instance and sets {@code dwSize}. */
+        public BLUETOOTH_DEVICE_SEARCH_PARAMS() {
+            dwSize = size();
+        }
+    }
+
+    /**
+     * The {@code BLUETOOTH_FIND_RADIO_PARAMS} structure facilitates the enumeration of installed Bluetooth radios.
+     *
+     * @see <a href=
+     *      "https://learn.microsoft.com/en-us/windows/win32/api/bluetoothapis/ns-bluetoothapis-bluetooth_find_radio_params">BLUETOOTH_FIND_RADIO_PARAMS</a>
+     */
+    @FieldOrder({ "dwSize" })
+    class BLUETOOTH_FIND_RADIO_PARAMS extends Structure {
+        /** Size of the structure, in bytes. */
+        public int dwSize;
+
+        /** Creates a new instance and sets {@code dwSize}. */
+        public BLUETOOTH_FIND_RADIO_PARAMS() {
+            dwSize = size();
+        }
+    }
+
+    /**
+     * The {@code BLUETOOTH_RADIO_INFO} structure contains information about a Bluetooth radio.
+     *
+     * @see <a href=
+     *      "https://learn.microsoft.com/en-us/windows/win32/api/bluetoothapis/ns-bluetoothapis-bluetooth_radio_info">BLUETOOTH_RADIO_INFO</a>
+     */
+    @FieldOrder({ "dwSize", "address", "szName", "ulClassofDevice", "lmpSubversion", "manufacturer" })
+    class BLUETOOTH_RADIO_INFO extends Structure {
+        /** Size of the structure, in bytes. */
+        public int dwSize;
+        /** Address of the local Bluetooth radio. */
+        public BLUETOOTH_ADDRESS address;
+        /** Name of the local Bluetooth radio. */
+        public char[] szName = new char[BLUETOOTH_MAX_NAME_SIZE];
+        /** Class of Device for the local Bluetooth radio. */
+        public int ulClassofDevice;
+        /** Manufacturer-specific subversion data. */
+        public short lmpSubversion;
+        /** Manufacturer of the Bluetooth radio, expressed as a BTH_MFG_Xxx value. */
+        public short manufacturer;
+
+        /** Creates a new instance and sets {@code dwSize}. */
+        public BLUETOOTH_RADIO_INFO() {
+            dwSize = size();
+        }
+    }
+
+    /**
+     * Finds the first Bluetooth radio installed on the system.
+     *
+     * @param pbtfrp  A pointer to a {@link BLUETOOTH_FIND_RADIO_PARAMS} structure.
+     * @param phRadio A pointer that receives the handle of the first radio found.
+     * @return A handle to use with {@link #BluetoothFindNextRadio} and {@link #BluetoothFindRadioClose}, or
+     *         {@code null} on failure. Call {@code GetLastError} for error information.
+     * @see <a href=
+     *      "https://learn.microsoft.com/en-us/windows/win32/api/bluetoothapis/nf-bluetoothapis-bluetoothfindfirstradio">BluetoothFindFirstRadio</a>
+     */
+    HANDLE BluetoothFindFirstRadio(BLUETOOTH_FIND_RADIO_PARAMS pbtfrp, PointerByReference phRadio);
+
+    /**
+     * Finds the next installed Bluetooth radio.
+     *
+     * @param hFind   The handle returned by {@link #BluetoothFindFirstRadio}.
+     * @param phRadio A pointer that receives the handle of the next radio found.
+     * @return {@code true} if another radio was found, {@code false} otherwise.
+     * @see <a href=
+     *      "https://learn.microsoft.com/en-us/windows/win32/api/bluetoothapis/nf-bluetoothapis-bluetoothfindnextradio">BluetoothFindNextRadio</a>
+     */
+    boolean BluetoothFindNextRadio(HANDLE hFind, PointerByReference phRadio);
+
+    /**
+     * Closes the enumeration handle for Bluetooth radios.
+     *
+     * @param hFind The handle returned by {@link #BluetoothFindFirstRadio}.
+     * @return {@code true} on success, {@code false} on failure.
+     * @see <a href=
+     *      "https://learn.microsoft.com/en-us/windows/win32/api/bluetoothapis/nf-bluetoothapis-bluetoothfindradioclose">BluetoothFindRadioClose</a>
+     */
+    boolean BluetoothFindRadioClose(HANDLE hFind);
+
+    /**
+     * Retrieves information about a Bluetooth radio.
+     *
+     * @param hRadio     A handle to the Bluetooth radio obtained from {@link #BluetoothFindFirstRadio}.
+     * @param pRadioInfo A pointer to a {@link BLUETOOTH_RADIO_INFO} structure to receive the radio information.
+     * @return {@code ERROR_SUCCESS} (0) on success, or an error code on failure.
+     * @see <a href=
+     *      "https://learn.microsoft.com/en-us/windows/win32/api/bluetoothapis/nf-bluetoothapis-bluetoothgetradioinfo">BluetoothGetRadioInfo</a>
+     */
+    int BluetoothGetRadioInfo(HANDLE hRadio, BLUETOOTH_RADIO_INFO pRadioInfo);
+
+    /**
+     * Begins the enumeration of Bluetooth devices.
+     *
+     * @param pbtsp A pointer to a {@link BLUETOOTH_DEVICE_SEARCH_PARAMS} structure specifying search criteria.
+     * @param pbtdi A pointer to a {@link BLUETOOTH_DEVICE_INFO} structure to receive the first device found.
+     * @return A handle to use with {@link #BluetoothFindNextDevice} and {@link #BluetoothFindDeviceClose}, or
+     *         {@code null} if no devices are found.
+     * @see <a href=
+     *      "https://learn.microsoft.com/en-us/windows/win32/api/bluetoothapis/nf-bluetoothapis-bluetoothfindfirstdevice">BluetoothFindFirstDevice</a>
+     */
+    HANDLE BluetoothFindFirstDevice(BLUETOOTH_DEVICE_SEARCH_PARAMS pbtsp, BLUETOOTH_DEVICE_INFO pbtdi);
+
+    /**
+     * Finds the next Bluetooth device.
+     *
+     * @param hFind The handle returned by {@link #BluetoothFindFirstDevice}.
+     * @param pbtdi A pointer to a {@link BLUETOOTH_DEVICE_INFO} structure to receive the next device found.
+     * @return {@code true} if another device was found, {@code false} otherwise.
+     * @see <a href=
+     *      "https://learn.microsoft.com/en-us/windows/win32/api/bluetoothapis/nf-bluetoothapis-bluetoothfindnextdevice">BluetoothFindNextDevice</a>
+     */
+    boolean BluetoothFindNextDevice(HANDLE hFind, BLUETOOTH_DEVICE_INFO pbtdi);
+
+    /**
+     * Closes the enumeration handle for Bluetooth devices.
+     *
+     * @param hFind The handle returned by {@link #BluetoothFindFirstDevice}.
+     * @return {@code true} on success, {@code false} on failure.
+     * @see <a href=
+     *      "https://learn.microsoft.com/en-us/windows/win32/api/bluetoothapis/nf-bluetoothapis-bluetoothfinddeviceclose">BluetoothFindDeviceClose</a>
+     */
+    boolean BluetoothFindDeviceClose(HANDLE hFind);
+}
diff --git a/contrib/platform/test/com/sun/jna/platform/win32/BluetoothApisTest.java b/contrib/platform/test/com/sun/jna/platform/win32/BluetoothApisTest.java
@@ -0,0 +1,98 @@
+/* Copyright (c) 2026 Daniel Widdis, All Rights Reserved
+ *
+ * The contents of this file is dual-licensed under 2
+ * alternative Open Source/Free licenses: LGPL 2.1 or later and
+ * Apache License 2.0. (starting with JNA version 4.0.0).
+ *
+ * You can freely decide which license you want to apply to
+ * the project.
+ *
+ * You may obtain a copy of the LGPL License at:
+ *
+ * http://www.gnu.org/licenses/licenses.html
+ *
+ * A copy is also included in the downloadable source code package
+ * containing JNA, in file "LGPL2.1".
+ *
+ * You may obtain a copy of the Apache License at:
+ *
+ * http://www.apache.org/licenses/
+ *
+ * A copy is also included in the downloadable source code package
+ * containing JNA, in file "AL2.0".
+ */
+package com.sun.jna.platform.win32;
+
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+import com.sun.jna.platform.win32.BluetoothApis.BLUETOOTH_DEVICE_INFO;
+import com.sun.jna.platform.win32.BluetoothApis.BLUETOOTH_DEVICE_SEARCH_PARAMS;
+import com.sun.jna.platform.win32.BluetoothApis.BLUETOOTH_FIND_RADIO_PARAMS;
+import com.sun.jna.platform.win32.BluetoothApis.BLUETOOTH_RADIO_INFO;
+import com.sun.jna.platform.win32.WinNT.HANDLE;
+import com.sun.jna.ptr.PointerByReference;
+
+/**
+ * Tests for {@link BluetoothApis}.
+ */
+public class BluetoothApisTest {
+
+    @Test
+    public void testStructureSizes() {
+        BLUETOOTH_FIND_RADIO_PARAMS radioParams = new BLUETOOTH_FIND_RADIO_PARAMS();
+        assertTrue("BLUETOOTH_FIND_RADIO_PARAMS size should be at least 4", radioParams.dwSize >= 4);
+
+        BLUETOOTH_DEVICE_SEARCH_PARAMS searchParams = new BLUETOOTH_DEVICE_SEARCH_PARAMS();
+        assertTrue("BLUETOOTH_DEVICE_SEARCH_PARAMS size should be at least 32", searchParams.dwSize >= 32);
+
+        BLUETOOTH_DEVICE_INFO deviceInfo = new BLUETOOTH_DEVICE_INFO();
+        assertTrue("BLUETOOTH_DEVICE_INFO size should be at least 560", deviceInfo.dwSize >= 560);
+
+        BLUETOOTH_RADIO_INFO radioInfo = new BLUETOOTH_RADIO_INFO();
+        assertTrue("BLUETOOTH_RADIO_INFO size should be at least 520", radioInfo.dwSize >= 520);
+    }
+
+    @Test
+    public void testBluetoothFindFirstRadio() {
+        BLUETOOTH_FIND_RADIO_PARAMS radioParams = new BLUETOOTH_FIND_RADIO_PARAMS();
+        PointerByReference phRadio = new PointerByReference();
+
+        // This may return null if no Bluetooth radio is present, which is acceptable
+        HANDLE hFind = BluetoothApis.INSTANCE.BluetoothFindFirstRadio(radioParams, phRadio);
+        if (hFind != null) {
+            try {
+                HANDLE hRadio = new HANDLE(phRadio.getValue());
+                try {
+                    assertNotNull("Radio handle should not be null", hRadio);
+
+                    BLUETOOTH_RADIO_INFO radioInfo = new BLUETOOTH_RADIO_INFO();
+                    int result = BluetoothApis.INSTANCE.BluetoothGetRadioInfo(hRadio, radioInfo);
+                    assertTrue("BluetoothGetRadioInfo should succeed", result == 0);
+
+                    // Enumerate devices
+                    BLUETOOTH_DEVICE_SEARCH_PARAMS searchParams = new BLUETOOTH_DEVICE_SEARCH_PARAMS();
+                    searchParams.fReturnAuthenticated = true;
+                    searchParams.fReturnRemembered = true;
+                    searchParams.fReturnConnected = true;
+                    searchParams.fReturnUnknown = false;
+                    searchParams.fIssueInquiry = false;
+                    searchParams.cTimeoutMultiplier = 0;
+                    searchParams.hRadio = hRadio;
+
+                    BLUETOOTH_DEVICE_INFO deviceInfo = new BLUETOOTH_DEVICE_INFO();
+                    HANDLE hFindDevice = BluetoothApis.INSTANCE.BluetoothFindFirstDevice(searchParams, deviceInfo);
+                    if (hFindDevice != null) {
+                        BluetoothApis.INSTANCE.BluetoothFindDeviceClose(hFindDevice);
+                    }
+                } finally {
+                    Kernel32.INSTANCE.CloseHandle(hRadio);
+                }
+            } finally {
+                BluetoothApis.INSTANCE.BluetoothFindRadioClose(hFind);
+            }
+        }
+    }
+}