When opening and closing HCI user channel, send monitoring messages to
be able to trace its behavior.
Signed-off-by: Marcel Holtmann <marcel@xxxxxxxxxxxx>
---
net/bluetooth/hci_sock.c | 35 +++++++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index 83e9fdb712e5..48f9471e7c85 100644
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -493,6 +493,11 @@ static struct sk_buff *create_monitor_ctrl_open(struct sock *sk)
ver[0] = BT_SUBSYS_VERSION;
put_unaligned_le16(BT_SUBSYS_REVISION, ver + 1);
break;
+ case HCI_CHANNEL_USER:
+ format = 0x0001;
+ ver[0] = BT_SUBSYS_VERSION;
+ put_unaligned_le16(BT_SUBSYS_REVISION, ver + 1);
+ break;
case HCI_CHANNEL_CONTROL:
format = 0x0002;
mgmt_fill_version_info(ver);
@@ -539,6 +544,7 @@ static struct sk_buff *create_monitor_ctrl_close(struct sock *sk)
switch (hci_pi(sk)->channel) {
case HCI_CHANNEL_RAW:
+ case HCI_CHANNEL_USER:
case HCI_CHANNEL_CONTROL:
break;
default:
@@ -827,6 +833,7 @@ static int hci_sock_release(struct socket *sock)
atomic_dec(&monitor_promisc);
break;
case HCI_CHANNEL_RAW:
+ case HCI_CHANNEL_USER:
case HCI_CHANNEL_CONTROL:
/* Send event to monitor */
skb = create_monitor_ctrl_close(sk);
@@ -1179,8 +1186,36 @@ static int hci_sock_bind(struct socket *sock, struct sockaddr *addr,
}
hci_pi(sk)->channel = haddr.hci_channel;
+
+ if (!hci_sock_gen_cookie(sk)) {
+ /* In the case when a cookie has already been assigned,
+ * this socket will transition from a raw socket into
+ * an user channel socket. For a clean transition, send
+ * the close notification first.
+ */
+ skb = create_monitor_ctrl_close(sk);
+ if (skb) {
+ hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
+ HCI_SOCK_TRUSTED, NULL);
+ kfree_skb(skb);
+ }
+ }
+
+ /* The user channel is restricted to CAP_NET_ADMIN
+ * capabilities and with that implicitly trusted.
+ */
+ hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
+
hci_pi(sk)->hdev = hdev;
+ /* Send event to monitor */
+ skb = create_monitor_ctrl_open(sk);
+ if (skb) {
+ hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
+ HCI_SOCK_TRUSTED, NULL);
+ kfree_skb(skb);
+ }
+
atomic_inc(&hdev->promisc);
break;
--
2.7.4
--
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