[BlueZ,v1,1/3] main.conf: Add LE.CentralAddressResolution option

Commit Message

Luiz Augusto von Dentz Nov. 25, 2024, 8:47 p.m. UTC

From: Luiz Augusto von Dentz <[e-mail]>

This adds CentralAddressResolution option to LE group which controls the
GATT attribute of the same name using the new MGMT Device Flag with the
fallback to LL Privacy experimental UUID.

Fixes: https://github.com/bluez/bluez/issues/1028
---
 lib/mgmt.h          |  1 +
 src/adapter.c       |  6 ++++++
 src/btd.h           |  2 ++
 src/device.c        | 23 ++++++++++++++++++++++-
 src/device.h        |  2 ++
 src/gatt-database.c | 12 +++++++++++-
 src/main.c          | 23 +++++++++++++++++++++--
 src/main.conf       |  6 ++++++
 8 files changed, 71 insertions(+), 4 deletions(-)

Comments

[e-mail] Nov. 25, 2024, 10:10 p.m. UTC | #1

This is automated email and please do not reply to this email!

Dear submitter,

Thank you for submitting the patches to the linux bluetooth mailing list.
This is a CI test results with your patch series:
PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=912341

---Test result---

Test Summary:
CheckPatch                    PENDING   0.26 seconds
GitLint                       PENDING   0.29 seconds
BuildEll                      PASS      20.68 seconds
BluezMake                     PASS      1584.43 seconds
MakeCheck                     PASS      13.15 seconds
MakeDistcheck                 PASS      162.16 seconds
CheckValgrind                 PASS      217.24 seconds
CheckSmatch                   WARNING   275.69 seconds
bluezmakeextell               PASS      100.06 seconds
IncrementalBuild              PENDING   0.32 seconds
ScanBuild                     PASS      868.90 seconds

Details
##############################
Test: CheckPatch - PENDING
Desc: Run checkpatch.pl script
Output:

##############################
Test: GitLint - PENDING
Desc: Run gitlint
Output:

##############################
Test: CheckSmatch - WARNING
Desc: Run smatch tool with source
Output:
monitor/packet.c: note: in included file:monitor/display.h:82:26: warning: Variable length array is used.monitor/packet.c:1868:26: warning: Variable length array is used.monitor/packet.c: note: in included file:monitor/bt.h:3606:52: warning: array of flexible structuresmonitor/bt.h:3594:40: warning: array of flexible structures
##############################
Test: IncrementalBuild - PENDING
Desc: Incremental build with the patches in the series
Output:



---
Regards,
Linux Bluetooth

Patch

diff --git a/lib/mgmt.h b/lib/mgmt.h
index f784dcada191..6a397645bcf2 100644
--- a/lib/mgmt.h
+++ b/lib/mgmt.h
@@ -678,6 +678,7 @@  struct mgmt_rp_get_device_flags {
 
 #define DEVICE_FLAG_REMOTE_WAKEUP	BIT(0)
 #define DEVICE_FLAG_DEVICE_PRIVACY	BIT(1)
+#define DEVICE_FLAG_ADDRESS_RESOLUTION	BIT(2)
 
 #define MGMT_OP_SET_DEVICE_FLAGS	0x0050
 #define MGMT_SET_DEVICE_FLAGS_SIZE	11
diff --git a/src/adapter.c b/src/adapter.c
index f422bbaae155..5d4117a49cfd 100644
--- a/src/adapter.c
+++ b/src/adapter.c
@@ -5701,6 +5701,12 @@  void adapter_set_device_flags(struct btd_adapter *adapter,
 	if (btd_opts.device_privacy && !(flags & DEVICE_FLAG_DEVICE_PRIVACY))
 		flags |= DEVICE_FLAG_DEVICE_PRIVACY & supported & ~pending;
 
+	/* Set Address Resolution if it has not been set the flag yet. */
+	if (btd_opts.defaults.le.addr_resolution &&
+			device_address_is_private(device) &&
+			!(flags & DEVICE_FLAG_ADDRESS_RESOLUTION))
+		flags |= DEVICE_FLAG_ADDRESS_RESOLUTION & supported & ~pending;
+
 	bdaddr = device_get_address(device);
 	bdaddr_type = btd_device_get_bdaddr_type(device);
 
diff --git a/src/btd.h b/src/btd.h
index 07205aa69486..6af44e3e4857 100644
--- a/src/btd.h
+++ b/src/btd.h
@@ -59,6 +59,8 @@  struct btd_br_defaults {
 };
 
 struct btd_le_defaults {
+	uint8_t		addr_resolution;
+
 	uint16_t	min_adv_interval;
 	uint16_t	max_adv_interval;
 	uint16_t	adv_rotation_interval;
diff --git a/src/device.c b/src/device.c
index 2b3d19f552fa..2d3ac71f6878 100644
--- a/src/device.c
+++ b/src/device.c
@@ -548,7 +548,7 @@  static gboolean store_device_info_cb(gpointer user_data)
 	return FALSE;
 }
 
-static bool device_address_is_private(struct btd_device *dev)
+bool device_address_is_private(struct btd_device *dev)
 {
 	if (dev->bdaddr_type != BDADDR_LE_RANDOM)
 		return false;
@@ -7338,6 +7338,27 @@  void btd_device_set_pnpid(struct btd_device *device, uint16_t source,
 	store_device_info(device);
 }
 
+bool btd_device_flags_enabled(struct btd_device *dev, uint32_t flags)
+{
+	const char *ll_privacy = "15c0a148-c273-11ea-b3de-0242ac130004";
+
+	if (!dev)
+		return false;
+
+	if (dev->current_flags & flags)
+		return true;
+
+	/* For backward compatibility check for LL Privacy experimental UUID
+	 * since that shall be equivalent to DEVICE_FLAG_ADDRESS_RESOLUTION on
+	 * older kernels.
+	 */
+	if ((flags & DEVICE_FLAG_ADDRESS_RESOLUTION) &&
+			btd_kernel_experimental_enabled(ll_privacy))
+		return true;
+
+	return false;
+}
+
 uint32_t btd_device_get_current_flags(struct btd_device *dev)
 {
 	return dev->current_flags;
diff --git a/src/device.h b/src/device.h
index 97536774ed5f..2e4a9771d585 100644
--- a/src/device.h
+++ b/src/device.h
@@ -28,6 +28,7 @@  bool device_name_known(struct btd_device *device);
 bool device_is_name_resolve_allowed(struct btd_device *device);
 void device_name_resolve_fail(struct btd_device *device);
 void device_set_class(struct btd_device *device, uint32_t class);
+bool device_address_is_private(struct btd_device *dev);
 void device_set_rpa(struct btd_device *device, bool value);
 void device_update_addr(struct btd_device *device, const bdaddr_t *bdaddr,
 							uint8_t bdaddr_type);
@@ -189,6 +190,7 @@  struct btd_service *btd_device_get_service(struct btd_device *dev,
 int device_discover_services(struct btd_device *device);
 int btd_device_connect_services(struct btd_device *dev, GSList *services);
 
+bool btd_device_flags_enabled(struct btd_device *dev, uint32_t flags);
 uint32_t btd_device_get_current_flags(struct btd_device *dev);
 uint32_t btd_device_get_supported_flags(struct btd_device *dev);
 uint32_t btd_device_get_pending_flags(struct btd_device *dev);
diff --git a/src/gatt-database.c b/src/gatt-database.c
index a86e528fd0e2..a5a01add40f7 100644
--- a/src/gatt-database.c
+++ b/src/gatt-database.c
@@ -22,6 +22,7 @@ 
 #include "lib/sdp.h"
 #include "lib/sdp_lib.h"
 #include "lib/uuid.h"
+#include "lib/mgmt.h"
 #include "btio/btio.h"
 #include "gdbus/gdbus.h"
 #include "src/shared/util.h"
@@ -738,10 +739,19 @@  static void gap_car_read_cb(struct gatt_db_attribute *attrib,
 					uint8_t opcode, struct bt_att *att,
 					void *user_data)
 {
-	uint8_t value = 0x01;
+	uint8_t value = 0x00;
 
 	DBG("GAP Central Address Resolution read request\n");
 
+	if (btd_opts.defaults.le.addr_resolution) {
+		struct btd_device *device;
+
+		device = btd_adapter_find_device_by_fd(bt_att_get_fd(att));
+		if (device)
+			value = btd_device_flags_enabled(device,
+					DEVICE_FLAG_ADDRESS_RESOLUTION);
+	}
+
 	gatt_db_attribute_read_result(attrib, id, 0, &value, sizeof(value));
 }
 
diff --git a/src/main.c b/src/main.c
index 41c3271a7457..794a51dbf586 100644
--- a/src/main.c
+++ b/src/main.c
@@ -109,6 +109,7 @@  static const char *br_options[] = {
 };
 
 static const char *le_options[] = {
+	"CentralAddressResolution",
 	"MinAdvertisementInterval",
 	"MaxAdvertisementInterval",
 	"MultiAdvertisementRotationInterval",
@@ -581,6 +582,11 @@  static void parse_br_config(GKeyFile *config)
 static void parse_le_config(GKeyFile *config)
 {
 	static const struct config_param params[] = {
+		{ "CentralAddressResolution",
+		  &btd_opts.defaults.le.addr_resolution,
+		  sizeof(btd_opts.defaults.le.addr_resolution),
+		  0,
+		  1},
 		{ "MinAdvertisementInterval",
 		  &btd_opts.defaults.le.min_adv_interval,
 		  sizeof(btd_opts.defaults.le.min_adv_interval),
@@ -708,9 +714,21 @@  static bool match_experimental(const void *data, const void *match_data)
 bool btd_kernel_experimental_enabled(const char *uuid)
 {
 	if (!btd_opts.kernel)
-		false;
+		goto done;
 
-	return queue_find(btd_opts.kernel, match_experimental, uuid);
+	if (queue_find(btd_opts.kernel, match_experimental, uuid))
+		return true;
+
+done:
+	/* For backward compatibility set LL Privacy as enabled if
+	 * CentralAddressResolution has been set so old kernel LL Privacy is
+	 * enabled.
+	 */
+	if (!strcmp(uuid, "15c0a148-c273-11ea-b3de-0242ac130004") &&
+			btd_opts.defaults.le.addr_resolution)
+		return true;
+
+	return false;
 }
 
 static const char *valid_uuids[] = {
@@ -1205,6 +1223,7 @@  static void init_defaults(void)
 	btd_opts.defaults.num_entries = 0;
 	btd_opts.defaults.br.page_scan_type = 0xFFFF;
 	btd_opts.defaults.br.scan_type = 0xFFFF;
+	btd_opts.defaults.le.addr_resolution = 0x01;
 	btd_opts.defaults.le.enable_advmon_interleave_scan = 0xFF;
 
 	if (sscanf(VERSION, "%hhu.%hhu", &major, &minor) != 2)
diff --git a/src/main.conf b/src/main.conf
index fff13ed2ff31..ca45c6ed0e25 100644
--- a/src/main.conf
+++ b/src/main.conf
@@ -178,6 +178,12 @@ 
 #MaxSniffInterval=
 
 [LE]
+# Enable/Disable Central Address Resolution.
+# 0: disable
+# 1: enable
+# Defaults to 1
+#CentralAddressResolution = 1
+
 # The following values are used to load default adapter parameters for LE.
 # BlueZ loads the values into the kernel before the adapter is powered if the
 # kernel supports the MGMT_LOAD_DEFAULT_PARAMETERS command. If a value isn't