add support to enumerate local supported codec capabilities
< HCI Command: Read Local Suppor.. (0x04|0x000e) plen 7
Codec: mSBC (0x05)
Logical Transport Type: 0x00
Direction: Input (Host to Controller) (0x00)
> HCI Event: Command Complete (0x0e) plen 12
Read Local Supported Codec Capabilities (0x04|0x000e) ncmd 1
Status: Success (0x00)
Number of codec capabilities: 1
Capabilities #0:
00 00 11 15 02 33
Signed-off-by: Kiran K <kiran.k@xxxxxxxxx>
Signed-off-by: Chethan T N <chethan.tumkur.narayan@xxxxxxxxx>
Signed-off-by: Srivatsa Ravishankar <ravishankar.srivatsa@xxxxxxxxx>
---
* changes in v2
add skb->len check before accessing event data
include/net/bluetooth/hci.h | 7 ++++
net/bluetooth/hci_event.c | 68 +++++++++++++++++++++++++++++++++++++
2 files changed, 75 insertions(+)
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index ea4ae551c426..e3f7771fe84f 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -1314,6 +1314,13 @@ struct hci_rp_read_local_pairing_opts {
__u8 max_key_size;
} __packed;
+#define HCI_OP_READ_LOCAL_CODEC_CAPS 0x100e
+struct hci_op_read_local_codec_caps {
+ __u8 codec_id[5];
+ __u8 transport;
+ __u8 direction;
+} __packed;
+
#define HCI_OP_READ_PAGE_SCAN_ACTIVITY 0x0c1b
struct hci_rp_read_page_scan_activity {
__u8 status;
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 5e99968939ce..a4b905a76c1b 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -887,6 +887,70 @@ static void hci_cc_read_data_block_size(struct hci_dev *hdev,
hdev->block_cnt, hdev->block_len);
}
+static void hci_cc_read_local_codecs(struct hci_dev *hdev,
+ struct sk_buff *skb)
+{
+ __u8 num_codecs;
+ struct hci_op_read_local_codec_caps caps;
+
+ if (skb->len < sizeof(caps))
+ return;
+
+ bt_dev_dbg(hdev, "status 0x%2.2x", skb->data[0]);
+
+ if (skb->data[0])
+ return;
+
+ /* enumerate standard codecs */
+ skb_pull(skb, 1);
+
+ if (skb->len < 1)
+ return;
+
+ num_codecs = skb->data[0];
+
+ bt_dev_dbg(hdev, "Number of standard codecs: %u", num_codecs);
+
+ skb_pull(skb, 1);
+
+ if (skb->len < num_codecs)
+ return;
+
+ while (num_codecs--) {
+ caps.codec_id[0] = skb->data[0];
+ caps.transport = 0x00;
+ caps.direction = 0x00;
+
+ hci_send_cmd(hdev, HCI_OP_READ_LOCAL_CODEC_CAPS, sizeof(caps),
+ &caps);
+
+ skb_pull(skb, 1);
+ }
+
+ /* enumerate vendor specific codecs */
+ if (skb->len < 1)
+ return;
+
+ num_codecs = skb->data[0];
+ skb_pull(skb, 1);
+
+ bt_dev_dbg(hdev, "Number of vendor specific codecs: %u", num_codecs);
+
+ if (skb->len < (num_codecs * 4))
+ return;
+
+ while (num_codecs--) {
+ caps.codec_id[0] = 0xFF;
+ memcpy(&caps.codec_id[1], skb->data, 4);
+ caps.transport = 0x00;
+ caps.direction = 0x00;
+
+ hci_send_cmd(hdev, HCI_OP_READ_LOCAL_CODEC_CAPS, sizeof(caps),
+ &caps);
+ skb_pull(skb, 4);
+ }
+}
+
static void hci_cc_read_clock(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_rp_read_clock *rp = (void *) skb->data;
@@ -3437,6 +3501,10 @@ static void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *skb,
hci_cc_read_data_block_size(hdev, skb);
break;
+ case HCI_OP_READ_LOCAL_CODECS:
+ hci_cc_read_local_codecs(hdev, skb);
+ break;
+
case HCI_OP_READ_FLOW_CONTROL_MODE:
hci_cc_read_flow_control_mode(hdev, skb);
break;
--
2.17.1
