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Commit aa1638dd authored by Marcel Holtmann's avatar Marcel Holtmann
Browse files

Bluetooth: Send control open and close messages for HCI user channels 



When opening and closing HCI user channel, send monitoring messages to
be able to trace its behavior.

Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: default avatarJohan Hedberg <johan.hedberg@intel.com>
parent bdca1fd9

net/bluetooth/hci_sock.c

+35 −0
Original line number Diff line number Diff line
@@ -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;