[PATCH BlueZ 0/2] shared/bap: Fix BASE parsing

[PATCH BlueZ 0/2] shared/bap: Fix BASE parsing

[Iulia Tanasescu]

This patch adds some fixes for the BASE parsing logic in BAP:

The first commit fixes the getsockopt call for BT_ISO_BASE, to
make sure that the correct BASE length is read from the kernel.

The second commit adds a missing case in the BASE parsing logic
for Broadcast Sinks: the BASE structure might contain level 3
(BIS specific) configuration LTV types that are not present at
level 2 (subgroup level). These values should also be appended
to the final BIS configuration.

Iulia Tanasescu (2):
  btio: Set correct length for getsockopt
  shared/bap: Append extra L3 LTVs to BIS config

 btio/btio.c      |  3 ++-
 src/shared/bap.c | 28 +++++++++++++++++++++++++++-
 2 files changed, 29 insertions(+), 2 deletions(-)


base-commit: 2ee08ffd4d469781dc627fa50b4a015d9ad68007
-- 
2.43.0

[PATCH BlueZ 1/2] btio: Set correct length for getsockopt

[Iulia Tanasescu]

When calling getsockopt for BT_ISO_BASE, this initializes the length
argument to the maximum size of the buffer where the bytes are placed.

This fixes the fact that, on a Broadcast Sink, if the BASE discovered
from a Broadcast Source exceeds a certain length, the bytes will be
incompletely read, causing issues when parsing the LTVs.
---
 btio/btio.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/btio/btio.c b/btio/btio.c
index 2d277e409..f32fbd509 100644
--- a/btio/btio.c
+++ b/btio/btio.c
@@ -5,7 +5,7 @@
  *
  *  Copyright (C) 2009-2010  Marcel Holtmann <marcel@holtmann.org>
  *  Copyright (C) 2009-2010  Nokia Corporation
- *  Copyright 2023-2024 NXP
+ *  Copyright 2023-2025 NXP
  *
  *
  */
@@ -1654,6 +1654,7 @@ static gboolean iso_get(int sock, GError **err, BtIOOption opt1, va_list args)
 		return FALSE;
 	}
 
+	len = BASE_MAX_LENGTH;
 	if (getsockopt(sock, SOL_BLUETOOTH, BT_ISO_BASE,
 			&base.base, &len) < 0) {
 		ERROR_FAILED(err, "getsockopt(BT_ISO_BASE)", errno);
-- 
2.43.0

RE: shared/bap: Fix BASE parsing

[bluez.test.bot]

[-- Attachment #1: Type: text/plain, Size: 1863 bytes --]

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=926463

---Test result---

Test Summary:
CheckPatch                    PENDING   0.37 seconds
GitLint                       PENDING   0.27 seconds
BuildEll                      PASS      20.19 seconds
BluezMake                     PASS      1456.82 seconds
MakeCheck                     PASS      13.06 seconds
MakeDistcheck                 PASS      157.07 seconds
CheckValgrind                 PASS      213.06 seconds
CheckSmatch                   WARNING   269.09 seconds
bluezmakeextell               PASS      97.96 seconds
IncrementalBuild              PENDING   0.36 seconds
ScanBuild                     PASS      851.68 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:
src/shared/bap.c:296:25: warning: array of flexible structuressrc/shared/bap.c: note: in included file:./src/shared/ascs.h:88:25: warning: array of flexible structuressrc/shared/bap.c:296:25: warning: array of flexible structuressrc/shared/bap.c: note: in included file:./src/shared/ascs.h:88:25: warning: array of flexible structuressrc/shared/bap.c:296:25: warning: array of flexible structuressrc/shared/bap.c: note: in included file:./src/shared/ascs.h:88:25: warning: array of flexible structures
##############################
Test: IncrementalBuild - PENDING
Desc: Incremental build with the patches in the series
Output:



---
Regards,
Linux Bluetooth

[PATCH BlueZ 2/2] shared/bap: Append extra L3 LTVs to BIS config

[Iulia Tanasescu]

According to the BAP spec, the level 3 of the BASE contains codec
configuration LTVs specific to each BIS, in addition to the
configuration provided at level 2 (subgroup level) (v1.0.1,
section 3.7.2.2 Basic Audio Announcements).

Currently, when a Broadcast Sink parses the BASE discovered from a
Broadcast Source, level 3 LTV types that are not also present at
level 2 are not included in the final BIS cofiguration, causing
incorrect stream handling. This updates the BASE parsing logic to
consider level 3 LTVs.
---
 src/shared/bap.c | 28 +++++++++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

diff --git a/src/shared/bap.c b/src/shared/bap.c
index 167501282..6ffeefa41 100644
--- a/src/shared/bap.c
+++ b/src/shared/bap.c
@@ -4,7 +4,7 @@
  *  BlueZ - Bluetooth protocol stack for Linux
  *
  *  Copyright (C) 2022  Intel Corporation. All rights reserved.
- *  Copyright 2023-2024 NXP
+ *  Copyright 2023-2025 NXP
  *
  */
 
@@ -6921,6 +6921,24 @@ static void bap_sink_check_level2_ltv(size_t i, uint8_t l, uint8_t t,
 		util_ltv_push(merge_data->result, l, t, v);
 }
 
+static void bap_sink_append_level3_ltv(size_t i, uint8_t l, uint8_t t,
+		uint8_t *v, void *user_data)
+{
+	struct bt_ltv_extract *merge_data = user_data;
+
+	merge_data->value = NULL;
+	util_ltv_foreach(merge_data->result->iov_base,
+			merge_data->result->iov_len,
+			&t,
+			bap_sink_check_level3_ltv, merge_data);
+
+	/* If the LTV at level 3 was not found in merged configuration,
+	 * append value
+	 */
+	if (!merge_data->value)
+		util_ltv_push(merge_data->result, l, t, v);
+}
+
 static void check_local_pac(void *data, void *user_data)
 {
 	struct bt_ltv_match *compare_data = user_data;
@@ -7028,6 +7046,14 @@ struct iovec *bt_bap_merge_caps(struct iovec *l2_caps, struct iovec *l3_caps)
 			NULL,
 			bap_sink_check_level2_ltv, &merge_data);
 
+	/* Append LTVs at level 3 (BIS) that were not found at
+	 * level 2 (subgroup)
+	 */
+	util_ltv_foreach(l3_caps->iov_base,
+			l3_caps->iov_len,
+			NULL,
+			bap_sink_append_level3_ltv, &merge_data);
+
 	return merge_data.result;
 }
 
-- 
2.43.0

Re: [PATCH BlueZ 0/2] shared/bap: Fix BASE parsing

[patchwork-bot+bluetooth]

Hello:

This series was applied to bluetooth/bluez.git (master)
by Luiz Augusto von Dentz <luiz.von.dentz@intel.com>:

On Fri, 17 Jan 2025 16:06:30 +0200 you wrote:
> This patch adds some fixes for the BASE parsing logic in BAP:
> 
> The first commit fixes the getsockopt call for BT_ISO_BASE, to
> make sure that the correct BASE length is read from the kernel.
> 
> The second commit adds a missing case in the BASE parsing logic
> for Broadcast Sinks: the BASE structure might contain level 3
> (BIS specific) configuration LTV types that are not present at
> level 2 (subgroup level). These values should also be appended
> to the final BIS configuration.
> 
> [...]

Here is the summary with links:
  - [BlueZ,1/2] btio: Set correct length for getsockopt
    https://git.kernel.org/pub/scm/bluetooth/bluez.git/?id=07e8e726758f
  - [BlueZ,2/2] shared/bap: Append extra L3 LTVs to BIS config
    https://git.kernel.org/pub/scm/bluetooth/bluez.git/?id=1479c86ec116

You are awesome, thank you!
-- 
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