From: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
ISO_LINK connections where not being handled properly on
hci_abort_conn_sync which sometimes resulted in sending the wrong
commands, or in case of having the reject command being sent by the
socket code (iso.c) which is sort of a layer violation.
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
---
net/bluetooth/hci_conn.c | 23 +++++++++++++++++++----
net/bluetooth/hci_sync.c | 34 ++++++++++++++++++++++++++++++++++
net/bluetooth/iso.c | 14 --------------
3 files changed, 53 insertions(+), 18 deletions(-)
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 88f18f375684..0b717989cd4f 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -1223,7 +1223,12 @@ void hci_conn_failed(struct hci_conn *conn, u8 status)
static void create_le_conn_complete(struct hci_dev *hdev, void *data, int err)
{
- struct hci_conn *conn = data;
+ struct hci_conn *conn;
+ u16 handle = PTR_ERR(data);
+
+ conn = hci_conn_hash_lookup_handle(hdev, handle);
+ if (!conn)
+ return;
bt_dev_dbg(hdev, "err %d", err);
@@ -1248,10 +1253,17 @@ static void create_le_conn_complete(struct hci_dev *hdev, void *data, int err)
static int hci_connect_le_sync(struct hci_dev *hdev, void *data)
{
- struct hci_conn *conn = data;
+ struct hci_conn *conn;
+ u16 handle = PTR_ERR(data);
+
+ conn = hci_conn_hash_lookup_handle(hdev, handle);
+ if (!conn)
+ return 0;
bt_dev_dbg(hdev, "conn %p", conn);
+ conn->state = BT_CONNECT;
+
return hci_le_create_conn_sync(hdev, conn);
}
@@ -1321,10 +1333,10 @@ struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
conn->sec_level = BT_SECURITY_LOW;
conn->conn_timeout = conn_timeout;
- conn->state = BT_CONNECT;
clear_bit(HCI_CONN_SCANNING, &conn->flags);
- err = hci_cmd_sync_queue(hdev, hci_connect_le_sync, conn,
+ err = hci_cmd_sync_queue(hdev, hci_connect_le_sync,
+ ERR_PTR(conn->handle),
create_le_conn_complete);
if (err) {
hci_conn_del(conn);
@@ -2858,6 +2870,9 @@ int hci_abort_conn(struct hci_conn *conn, u8 reason)
/* If the connection is pending check the command opcode since that
* might be blocking on hci_cmd_sync_work while waiting its respective
* event so we need to hci_cmd_sync_cancel to cancel it.
+ *
+ * hci_connect_le serializes the connection attempts so only one
+ * connection can be in BT_CONNECT at time.
*/
if (conn->state == BT_CONNECT && hdev->req_status == HCI_REQ_PEND) {
switch (hci_skb_event(hdev->sent_cmd)) {
diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
index 2e9140300712..f8c7b13ca4fc 100644
--- a/net/bluetooth/hci_sync.c
+++ b/net/bluetooth/hci_sync.c
@@ -5293,6 +5293,24 @@ static int hci_connect_cancel_sync(struct hci_dev *hdev, struct hci_conn *conn,
if (conn->type == LE_LINK)
return hci_le_connect_cancel_sync(hdev, conn, reason);
+ if (conn->type == ISO_LINK) {
+ /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E
+ * page 1857:
+ *
+ * If this command is issued for a CIS on the Central and the
+ * CIS is successfully terminated before being established,
+ * then an HCI_LE_CIS_Established event shall also be sent for
+ * this CIS with the Status Operation Cancelled by Host (0x44).
+ */
+ if (test_bit(HCI_CONN_CREATE_CIS, &conn->flags))
+ return hci_disconnect_sync(hdev, conn, reason);
+
+ /* There is no way to cancel a BIS without terminating the BIG
+ * which is done later on connection cleanup.
+ */
+ return 0;
+ }
+
if (hdev->hci_ver < BLUETOOTH_VER_1_2)
return 0;
@@ -5319,11 +5337,27 @@ static int hci_reject_sco_sync(struct hci_dev *hdev, struct hci_conn *conn,
sizeof(cp), &cp, HCI_CMD_TIMEOUT);
}
+static int hci_le_reject_cis_sync(struct hci_dev *hdev, struct hci_conn *conn,
+ u8 reason)
+{
+ struct hci_cp_le_reject_cis cp;
+
+ memset(&cp, 0, sizeof(cp));
+ cp.handle = cpu_to_le16(conn->handle);
+ cp.reason = reason;
+
+ return __hci_cmd_sync_status(hdev, HCI_OP_LE_REJECT_CIS,
+ sizeof(cp), &cp, HCI_CMD_TIMEOUT);
+}
+
static int hci_reject_conn_sync(struct hci_dev *hdev, struct hci_conn *conn,
u8 reason)
{
struct hci_cp_reject_conn_req cp;
+ if (conn->type == ISO_LINK)
+ return hci_le_reject_cis_sync(hdev, conn, reason);
+
if (conn->type == SCO_LINK || conn->type == ESCO_LINK)
return hci_reject_sco_sync(hdev, conn, reason);
diff --git a/net/bluetooth/iso.c b/net/bluetooth/iso.c
index 84d238d0639a..9c41af55f2c7 100644
--- a/net/bluetooth/iso.c
+++ b/net/bluetooth/iso.c
@@ -614,18 +614,6 @@ static void iso_sock_kill(struct sock *sk)
sock_put(sk);
}
-static void iso_conn_defer_reject(struct hci_conn *conn)
-{
- struct hci_cp_le_reject_cis cp;
-
- BT_DBG("conn %p", conn);
-
- memset(&cp, 0, sizeof(cp));
- cp.handle = cpu_to_le16(conn->handle);
- cp.reason = HCI_ERROR_REJ_BAD_ADDR;
- hci_send_cmd(conn->hdev, HCI_OP_LE_REJECT_CIS, sizeof(cp), &cp);
-}
-
static void __iso_sock_close(struct sock *sk)
{
BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
@@ -650,8 +638,6 @@ static void __iso_sock_close(struct sock *sk)
break;
case BT_CONNECT2:
- if (iso_pi(sk)->conn->hcon)
- iso_conn_defer_reject(iso_pi(sk)->conn->hcon);
iso_chan_del(sk, ECONNRESET);
break;
case BT_CONNECT:
--
2.40.1
