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Bluetooth: ISO: use correct CIS order in Set CIG Parameters event

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The order of CIS handle array in Set CIG Parameters response shall match
the order of the CIS_ID array in the command (Core v5.3 Vol 4 Part E Sec
7.8.97).  We send CIS_IDs mainly in the order of increasing CIS_ID (but
with "last" CIS first if it has fixed CIG_ID).  In handling of the
reply, we currently assume this is also the same as the order of
hci_conn in hdev->conn_hash, but that is not true.

Match the correct hci_conn to the correct handle by matching them based
on the CIG+CIS combination.  The CIG+CIS combination shall be unique for
ISO_LINK hci_conn at state >= BT_BOUND, which we maintain in
hci_le_set_cig_params.

Fixes: 26afbd826e ("Bluetooth: Add initial implementation of CIS connections")
Signed-off-by: Pauli Virtanen <pav@iki.fi>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Pauli Virtanen 2023-06-01 09:34:45 +03:00 committed by Luiz Augusto von Dentz
parent 6c242c64a0
commit 71e9588435
2 changed files with 29 additions and 20 deletions
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3
include/net/bluetooth/hci_core.h
View File

@ -1202,7 +1202,8 @@ static inline struct hci_conn *hci_conn_hash_lookup_cis(struct hci_dev *hdev,
if (id != BT_ISO_QOS_CIS_UNSET && id != c->iso_qos.ucast.cis)
continue;
if (ba_type == c->dst_type && !bacmp(&c->dst, ba)) {
/* Match destination address if set */
if (!ba || (ba_type == c->dst_type && !bacmp(&c->dst, ba))) {
rcu_read_unlock();
return c;
}

46
net/bluetooth/hci_event.c
View File

@ -3804,48 +3804,56 @@ static u8 hci_cc_le_set_cig_params(struct hci_dev *hdev, void *data,
struct sk_buff *skb)
{
struct hci_rp_le_set_cig_params *rp = data;
struct hci_cp_le_set_cig_params *cp;
struct hci_conn *conn;
int i = 0;
u8 status = rp->status;
int i;
bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_CIG_PARAMS);
if (!cp || rp->num_handles != cp->num_cis || rp->cig_id != cp->cig_id) {
bt_dev_err(hdev, "unexpected Set CIG Parameters response data");
status = HCI_ERROR_UNSPECIFIED;
}
hci_dev_lock(hdev);
if (rp->status) {
if (status) {
while ((conn = hci_conn_hash_lookup_cig(hdev, rp->cig_id))) {
conn->state = BT_CLOSED;
hci_connect_cfm(conn, rp->status);
hci_connect_cfm(conn, status);
hci_conn_del(conn);
}
goto unlock;
}
rcu_read_lock();
list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
if (conn->type != ISO_LINK ||
conn->iso_qos.ucast.cig != rp->cig_id ||
conn->state == BT_CONNECTED)
/* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2553
*
* If the Status return parameter is zero, then the Controller shall
* set the Connection_Handle arrayed return parameter to the connection
* handle(s) corresponding to the CIS configurations specified in
* the CIS_IDs command parameter, in the same order.
*/
for (i = 0; i < rp->num_handles; ++i) {
conn = hci_conn_hash_lookup_cis(hdev, NULL, 0, rp->cig_id,
cp->cis[i].cis_id);
if (!conn || !bacmp(&conn->dst, BDADDR_ANY))
continue;
conn->handle = __le16_to_cpu(rp->handle[i++]);
if (conn->state != BT_BOUND && conn->state != BT_CONNECT)
continue;
conn->handle = __le16_to_cpu(rp->handle[i]);
bt_dev_dbg(hdev, "%p handle 0x%4.4x parent %p", conn,
conn->handle, conn->parent);
/* Create CIS if LE is already connected */
if (conn->parent && conn->parent->state == BT_CONNECTED) {
rcu_read_unlock();
if (conn->parent && conn->parent->state == BT_CONNECTED)
hci_le_create_cis(conn);
rcu_read_lock();
}
if (i == rp->num_handles)
break;
}
rcu_read_unlock();
unlock:
hci_dev_unlock(hdev);