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Commit 73f22f62 authored by Johan Hedberg's avatar Johan Hedberg Committed by Gustavo Padovan
Browse files

Bluetooth: Add support for set_discoverable management command 



This patch adds a set_discoverable command to the management interface
as well as the corresponding event. The command is used to control the
discoverable state of adapters.

Signed-off-by: default avatarJohan Hedberg <johan.hedberg@nokia.com>
Signed-off-by: default avatarGustavo F. Padovan <padovan@profusion.mobi>
parent eec8d2bc

include/net/bluetooth/hci_core.h

+1 −0
Original line number Diff line number Diff line
@@ -675,6 +675,7 @@ int mgmt_control(struct sock *sk, struct msghdr *msg, size_t len); 
int mgmt_index_added(u16 index);

int mgmt_index_removed(u16 index);

int mgmt_powered(u16 index, u8 powered);

int mgmt_discoverable(u16 index, u8 discoverable);



/* HCI info for socket */

#define hci_pi(sk) ((struct hci_pinfo *) sk)

include/net/bluetooth/mgmt.h

+16 −0
Original line number Diff line number Diff line
@@ -68,6 +68,16 @@ struct mgmt_rp_set_powered { 
	__u8 powered;

} __packed;



#define MGMT_OP_SET_DISCOVERABLE	0x0006

struct mgmt_cp_set_discoverable {

	__le16 index;

	__u8 discoverable;

} __packed;

struct mgmt_rp_set_discoverable {

	__le16 index;

	__u8 discoverable;

} __packed;



#define MGMT_EV_CMD_COMPLETE		0x0001

struct mgmt_ev_cmd_complete {

	__le16 opcode;
@@ -101,3 +111,9 @@ struct mgmt_ev_powered { 
	__le16 index;

	__u8 powered;

} __packed;



#define MGMT_EV_DISCOVERABLE		0x0007

struct mgmt_ev_discoverable {

	__le16 index;

	__u8 discoverable;

} __packed;

net/bluetooth/hci_event.c

+4 −1
Original line number Diff line number Diff line
@@ -278,8 +278,11 @@ static void hci_cc_write_scan_enable(struct hci_dev *hdev, struct sk_buff *skb) 
		clear_bit(HCI_PSCAN, &hdev->flags);

		clear_bit(HCI_ISCAN, &hdev->flags);



		if (param & SCAN_INQUIRY)

		if (param & SCAN_INQUIRY) {

			set_bit(HCI_ISCAN, &hdev->flags);

			mgmt_discoverable(hdev->id, 1);

		} else

			mgmt_discoverable(hdev->id, 0);



		if (param & SCAN_PAGE)

			set_bit(HCI_PSCAN, &hdev->flags);

net/bluetooth/mgmt.c

+137 −5
Original line number Diff line number Diff line
@@ -307,6 +307,18 @@ static struct pending_cmd *mgmt_pending_find(u16 opcode, int index) 
	return NULL;

}



static void mgmt_pending_remove(u16 opcode, int index)

{

	struct pending_cmd *cmd;



	cmd = mgmt_pending_find(opcode, index);

	if (cmd == NULL)

		return;



	list_del(&cmd->list);

	mgmt_pending_free(cmd);

}



static int set_powered(struct sock *sk, unsigned char *data, u16 len)

{

	struct mgmt_cp_set_powered *cp;
@@ -353,6 +365,63 @@ static int set_powered(struct sock *sk, unsigned char *data, u16 len) 
	return ret;

}



static int set_discoverable(struct sock *sk, unsigned char *data, u16 len)

{

	struct mgmt_cp_set_discoverable *cp;

	struct hci_dev *hdev;

	u16 dev_id;

	u8 scan;

	int err;



	cp = (void *) data;

	dev_id = get_unaligned_le16(&cp->index);



	BT_DBG("request for hci%u", dev_id);



	hdev = hci_dev_get(dev_id);

	if (!hdev)

		return cmd_status(sk, MGMT_OP_SET_DISCOVERABLE, ENODEV);



	hci_dev_lock_bh(hdev);



	if (!test_bit(HCI_UP, &hdev->flags)) {

		err = cmd_status(sk, MGMT_OP_SET_DISCOVERABLE, ENETDOWN);

		goto failed;

	}



	if (mgmt_pending_find(MGMT_OP_SET_DISCOVERABLE, dev_id) ||

			mgmt_pending_find(MGMT_OP_SET_CONNECTABLE, dev_id) ||

			hci_sent_cmd_data(hdev, HCI_OP_WRITE_SCAN_ENABLE)) {

		err = cmd_status(sk, MGMT_OP_SET_DISCOVERABLE, EBUSY);

		goto failed;

	}



	if (cp->discoverable == test_bit(HCI_ISCAN, &hdev->flags) &&

					test_bit(HCI_PSCAN, &hdev->flags)) {

		err = cmd_status(sk, MGMT_OP_SET_DISCOVERABLE, EALREADY);

		goto failed;

	}



	err = mgmt_pending_add(sk, MGMT_OP_SET_DISCOVERABLE, dev_id, data, len);

	if (err < 0)

		goto failed;



	scan = SCAN_PAGE;



	if (cp->discoverable)

		scan |= SCAN_INQUIRY;



	err = hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);

	if (err < 0)

		mgmt_pending_remove(MGMT_OP_SET_DISCOVERABLE, dev_id);



failed:

	hci_dev_unlock_bh(hdev);

	hci_dev_put(hdev);



	return err;

}



int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen)

{

	unsigned char *buf;
@@ -396,6 +465,9 @@ int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen) 
	case MGMT_OP_SET_POWERED:

		err = set_powered(sk, buf + sizeof(*hdr), len);

		break;

	case MGMT_OP_SET_DISCOVERABLE:

		err = set_discoverable(sk, buf + sizeof(*hdr), len);

		break;

	default:

		BT_DBG("Unknown op %u", opcode);

		err = cmd_status(sk, opcode, 0x01);
@@ -453,8 +525,8 @@ int mgmt_index_removed(u16 index) 
	return mgmt_event(MGMT_EV_INDEX_REMOVED, &ev, sizeof(ev), NULL);

}



struct powered_lookup {

	u8 powered;

struct cmd_lookup {

	u8 value;

	struct sock *sk;

};
@@ -465,9 +537,9 @@ static void power_rsp(struct pending_cmd *cmd, void *data) 
	struct mgmt_rp_set_powered *rp;

	struct mgmt_cp_set_powered *cp = cmd->cmd;

	struct sk_buff *skb;

	struct powered_lookup *match = data;

	struct cmd_lookup *match = data;



	if (cp->powered != match->powered)

	if (cp->powered != match->value)

		return;



	skb = alloc_skb(sizeof(*hdr) + sizeof(*ev) + sizeof(*rp), GFP_ATOMIC);
@@ -501,7 +573,7 @@ static void power_rsp(struct pending_cmd *cmd, void *data) 
int mgmt_powered(u16 index, u8 powered)

{

	struct mgmt_ev_powered ev;

	struct powered_lookup match = { powered, NULL };

	struct cmd_lookup match = { powered, NULL };

	int ret;



	put_unaligned_le16(index, &ev.index);
@@ -516,3 +588,63 @@ int mgmt_powered(u16 index, u8 powered) 


	return ret;

}



static void discoverable_rsp(struct pending_cmd *cmd, void *data)

{

	struct mgmt_cp_set_discoverable *cp = cmd->cmd;

	struct cmd_lookup *match = data;

	struct sk_buff *skb;

	struct mgmt_hdr *hdr;

	struct mgmt_ev_cmd_complete *ev;

	struct mgmt_rp_set_discoverable *rp;



	if (cp->discoverable != match->value)

		return;



	skb = alloc_skb(sizeof(*hdr) + sizeof(*ev) + sizeof(*rp), GFP_ATOMIC);

	if (!skb)

		return;



	hdr = (void *) skb_put(skb, sizeof(*hdr));

	hdr->opcode = cpu_to_le16(MGMT_EV_CMD_COMPLETE);

	hdr->len = cpu_to_le16(sizeof(*ev) + sizeof(*rp));



	ev = (void *) skb_put(skb, sizeof(*ev));

	put_unaligned_le16(MGMT_OP_SET_DISCOVERABLE, &ev->opcode);



	rp = (void *) skb_put(skb, sizeof(*rp));

	put_unaligned_le16(cmd->index, &rp->index);

	rp->discoverable = cp->discoverable;



	if (sock_queue_rcv_skb(cmd->sk, skb) < 0)

		kfree_skb(skb);



	list_del(&cmd->list);



	if (match->sk == NULL) {

		match->sk = cmd->sk;

		sock_hold(match->sk);

	}



	mgmt_pending_free(cmd);

}



int mgmt_discoverable(u16 index, u8 discoverable)

{

	struct mgmt_ev_discoverable ev;

	struct cmd_lookup match = { discoverable, NULL };

	int ret;



	put_unaligned_le16(index, &ev.index);

	ev.discoverable = discoverable;



	mgmt_pending_foreach(MGMT_OP_SET_DISCOVERABLE, index,

						discoverable_rsp, &match);



	ret = mgmt_event(MGMT_EV_DISCOVERABLE, &ev, sizeof(ev), match.sk);



	if (match.sk)

		sock_put(match.sk);



	return ret;

}