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Bluetooth: Add disconnect managment command

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This patch adds a disconnect command to the managment interface. Using
this command user space is able to force the disconnection of connected
devices. The command maps directly to the Disconnect HCI command.

Signed-off-by: Johan Hedberg <johan.hedberg@nokia.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
This commit is contained in:
Johan Hedberg 2011-01-20 12:40:27 +02:00 committed by Gustavo F. Padovan
parent f7520543ab
commit 8962ee74be
4 changed files with 137 additions and 2 deletions
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1
include/net/bluetooth/hci_core.h
View File

@ -716,6 +716,7 @@ int mgmt_connectable(u16 index, u8 connectable);
int mgmt_new_key(u16 index, struct link_key *key, u8 old_key_type);
int mgmt_connected(u16 index, bdaddr_t *bdaddr);
int mgmt_disconnected(u16 index, bdaddr_t *bdaddr);
int mgmt_disconnect_failed(u16 index);
/* HCI info for socket */
#define hci_pi(sk) ((struct hci_pinfo *) sk)

10
include/net/bluetooth/mgmt.h
View File

@ -120,6 +120,16 @@ struct mgmt_cp_remove_key {
__u8 disconnect;
} __packed;
#define MGMT_OP_DISCONNECT 0x000F
struct mgmt_cp_disconnect {
__le16 index;
bdaddr_t bdaddr;
} __packed;
struct mgmt_rp_disconnect {
__le16 index;
bdaddr_t bdaddr;
} __packed;
#define MGMT_EV_CMD_COMPLETE 0x0001
struct mgmt_ev_cmd_complete {
__le16 opcode;

9
net/bluetooth/hci_event.c
View File

@ -1264,8 +1264,10 @@ static inline void hci_disconn_complete_evt(struct hci_dev *hdev, struct sk_buff
BT_DBG("%s status %d", hdev->name, ev->status);
if (ev->status)
if (ev->status) {
mgmt_disconnect_failed(hdev->id);
return;
}
hci_dev_lock(hdev);
@ -1680,6 +1682,11 @@ static inline void hci_cmd_status_evt(struct hci_dev *hdev, struct sk_buff *skb)
hci_cs_exit_sniff_mode(hdev, ev->status);
break;
case HCI_OP_DISCONNECT:
if (ev->status != 0)
mgmt_disconnect_failed(hdev->id);
break;
default:
BT_DBG("%s opcode 0x%x", hdev->name, opcode);
break;

119
net/bluetooth/mgmt.c
View File

@ -887,6 +887,60 @@ unlock:
return err;
}
static int disconnect(struct sock *sk, unsigned char *data, u16 len)
{
struct hci_dev *hdev;
struct mgmt_cp_disconnect *cp;
struct hci_cp_disconnect dc;
struct hci_conn *conn;
u16 dev_id;
int err;
BT_DBG("");
cp = (void *) data;
dev_id = get_unaligned_le16(&cp->index);
hdev = hci_dev_get(dev_id);
if (!hdev)
return cmd_status(sk, MGMT_OP_DISCONNECT, ENODEV);
hci_dev_lock_bh(hdev);
if (!test_bit(HCI_UP, &hdev->flags)) {
err = cmd_status(sk, MGMT_OP_DISCONNECT, ENETDOWN);
goto failed;
}
if (mgmt_pending_find(MGMT_OP_DISCONNECT, dev_id)) {
err = cmd_status(sk, MGMT_OP_DISCONNECT, EBUSY);
goto failed;
}
conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
if (!conn) {
err = cmd_status(sk, MGMT_OP_DISCONNECT, ENOTCONN);
goto failed;
}
err = mgmt_pending_add(sk, MGMT_OP_DISCONNECT, dev_id, data, len);
if (err < 0)
goto failed;
put_unaligned_le16(conn->handle, &dc.handle);
dc.reason = 0x13; /* Remote User Terminated Connection */
err = hci_send_cmd(hdev, HCI_OP_DISCONNECT, sizeof(dc), &dc);
if (err < 0)
mgmt_pending_remove(MGMT_OP_DISCONNECT, 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;
@ -957,6 +1011,9 @@ int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen)
case MGMT_OP_REMOVE_KEY:
err = remove_key(sk, buf + sizeof(*hdr), len);
break;
case MGMT_OP_DISCONNECT:
err = disconnect(sk, buf + sizeof(*hdr), len);
break;
default:
BT_DBG("Unknown op %u", opcode);
err = cmd_status(sk, opcode, 0x01);
@ -1101,12 +1158,72 @@ int mgmt_connected(u16 index, bdaddr_t *bdaddr)
return mgmt_event(MGMT_EV_CONNECTED, &ev, sizeof(ev), NULL);
}
static void disconnect_rsp(struct pending_cmd *cmd, void *data)
{
struct mgmt_cp_disconnect *cp = cmd->cmd;
struct sock **sk = data;
struct sk_buff *skb;
struct mgmt_hdr *hdr;
struct mgmt_ev_cmd_complete *ev;
struct mgmt_rp_disconnect *rp;
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_DISCONNECT, &ev->opcode);
rp = (void *) skb_put(skb, sizeof(*rp));
put_unaligned_le16(cmd->index, &rp->index);
bacpy(&rp->bdaddr, &cp->bdaddr);
if (sock_queue_rcv_skb(cmd->sk, skb) < 0)
kfree_skb(skb);
*sk = cmd->sk;
sock_hold(*sk);
list_del(&cmd->list);
mgmt_pending_free(cmd);
}
int mgmt_disconnected(u16 index, bdaddr_t *bdaddr)
{
struct mgmt_ev_disconnected ev;
struct sock *sk = NULL;
int err;
mgmt_pending_foreach(MGMT_OP_DISCONNECT, index, disconnect_rsp, &sk);
put_unaligned_le16(index, &ev.index);
bacpy(&ev.bdaddr, bdaddr);
return mgmt_event(MGMT_EV_DISCONNECTED, &ev, sizeof(ev), NULL);
err = mgmt_event(MGMT_EV_DISCONNECTED, &ev, sizeof(ev), sk);
if (sk)
sock_put(sk);
return err;
}
int mgmt_disconnect_failed(u16 index)
{
struct pending_cmd *cmd;
int err;
cmd = mgmt_pending_find(MGMT_OP_DISCONNECT, index);
if (!cmd)
return -ENOENT;
err = cmd_status(cmd->sk, MGMT_OP_DISCONNECT, EIO);
list_del(&cmd->list);
mgmt_pending_free(cmd);
return err;
}