This patch adds an le_supported_roles features which allows a
clients to determine if the controller is able to support peripheral and
central connections separately and at the same time.
Signed-off-by: Alain Michaud <alainm@xxxxxxxxxxxx>
---
Changes in v2:
- Slight change of design based on offline feedback
net/bluetooth/mgmt.c | 36 +++++++++++++++++++++++++++++++++++-
1 file changed, 35 insertions(+), 1 deletion(-)
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 5e9b9728eeac..c13fcc21745f 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -3753,10 +3753,36 @@ static const u8 debug_uuid[16] = {
};
#endif
+/* 671b10b5-42c0-4696-9227-eb28d1b049d6 */
+static const u8 le_supported_roles[16] = {
+ 0xd6, 0x49, 0xb0, 0xd1, 0x28, 0xeb, 0x27, 0x92,
+ 0x96, 0x46, 0xc0, 0x42, 0xb5, 0x10, 0x1b, 0x67,
+};
+
+static u32 get_le_roles_flags(struct hci_dev *hdev)
+{
+ u32 flags = 0;
+
+ /* Central connections supported */
+ if (hdev->le_states[4] & 0x08)
+ flags |= BIT(0);
+
+ /* Peripheral connections supported */
+ if (hdev->le_states[4] & 0x40)
+ flags |= BIT(1);
+
+ /* Simult central and peripheral connections supported */
+ if (test_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks) &&
+ (hdev->le_states[3] & 0x10))
+ flags |= BIT(2);
+
+ return flags;
+}
+
static int read_exp_features_info(struct sock *sk, struct hci_dev *hdev,
void *data, u16 data_len)
{
- char buf[42];
+ char buf[44];
struct mgmt_rp_read_exp_features_info *rp = (void *)buf;
u16 idx = 0;
@@ -3774,6 +3800,14 @@ static int read_exp_features_info(struct sock *sk, struct hci_dev *hdev,
}
#endif
+ if (hdev) {
+ memcpy(rp->features[idx].uuid, le_supported_roles,
+ sizeof(le_supported_roles));
+
+ rp->features[idx].flags = cpu_to_le32(get_le_roles_flags(hdev));
+ ++idx;
+ }
+
rp->feature_count = cpu_to_le16(idx);
/* After reading the experimental features information, enable
--
2.27.0.212.ge8ba1cc988-goog
