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Bluetooth: Fix authentication if acl data comes before remote feature evt 

If remote device sends l2cap info request before read_remote_ext_feature
completes then mgmt_connected will be sent in hci_acldata_packet() and
remote name request wont be sent and eventually authentication wont happen

Hcidump log of the issue

< HCI Command: Create Connection (0x01|0x0005) plen 13
    bdaddr BC:85:1F:74:7F:29 ptype 0xcc18 rswitch 0x01 clkoffset 0x4bf7 (valid)
    Packet type: DM1 DM3 DM5 DH1 DH3 DH5
> HCI Event: Command Status (0x0f) plen 4
    Create Connection (0x01|0x0005) status 0x00 ncmd 1
> HCI Event: Connect Complete (0x03) plen 11
    status 0x00 handle 12 bdaddr BC:85:1F:74:7F:29 type ACL encrypt 0x00
< HCI Command: Read Remote Supported Features (0x01|0x001b) plen 2
    handle 12
> HCI Event: Command Status (0x0f) plen 4
    Read Remote Supported Features (0x01|0x001b) status 0x00 ncmd 1
> HCI Event: Read Remote Supported Features (0x0b) plen 11
    status 0x00 handle 12
    Features: 0xbf 0xfe 0xcf 0xfe 0xdb 0xff 0x7b 0x87
> HCI Event: Max Slots Change (0x1b) plen 3
    handle 12 slots 5
< HCI Command: Read Remote Extended Features (0x01|0x001c) plen 3
    handle 12 page 1
> HCI Event: Command Status (0x0f) plen 4
    Read Remote Extended Features (0x01|0x001c) status 0x00 ncmd 1
> ACL data: handle 12 flags 0x02 dlen 10
    L2CAP(s): Info req: type 2
< ACL data: handle 12 flags 0x00 dlen 16
    L2CAP(s): Info rsp: type 2 result 0
      Extended feature mask 0x00b8
        Enhanced Retransmission mode
        Streaming mode
        FCS Option
        Fixed Channels
> HCI Event: Read Remote Extended Features (0x23) plen 13
    status 0x00 handle 12 page 1 max 1
    Features: 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00
> ACL data: handle 12 flags 0x02 dlen 10
    L2CAP(s): Info req: type 3
< ACL data: handle 12 flags 0x00 dlen 20
    L2CAP(s): Info rsp: type 3 result 0
      Fixed channel list 0x00000002
        L2CAP Signalling Channel
> HCI Event: Number of Completed Packets (0x13) plen 5
    handle 12 packets 2

This patch moves sending mgmt_connected from hci_acldata_packet() to
l2cap_connect_req() since this code is to handle the scenario remote
device sends l2cap connect req too fast

Signed-off-by: Jaganath Kanakkassery <jaganath.k@samsung.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
This commit is contained in:
Jaganath Kanakkassery 2013-01-10 10:28:35 +05:30 committed by Gustavo Padovan
parent f4d6f7dce7
commit 7b064edae3
2 changed files with 11 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
net/bluetooth/hci_core.c
View File

@ -2810,14 +2810,6 @@ static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
if (conn) {
hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
hci_dev_lock(hdev);
if (test_bit(HCI_MGMT, &hdev->dev_flags) &&
!test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
mgmt_device_connected(hdev, &conn->dst, conn->type,
conn->dst_type, 0, NULL, 0,
conn->dev_class);
hci_dev_unlock(hdev);
/* Send to upper protocol */
l2cap_recv_acldata(conn, skb, flags);
return;

11
net/bluetooth/l2cap_core.c
View File

@ -3727,6 +3727,17 @@ sendresp:
static int l2cap_connect_req(struct l2cap_conn *conn,
struct l2cap_cmd_hdr *cmd, u8 *data)
{
struct hci_dev *hdev = conn->hcon->hdev;
struct hci_conn *hcon = conn->hcon;
hci_dev_lock(hdev);
if (test_bit(HCI_MGMT, &hdev->dev_flags) &&
!test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &hcon->flags))
mgmt_device_connected(hdev, &hcon->dst, hcon->type,
hcon->dst_type, 0, NULL, 0,
hcon->dev_class);
hci_dev_unlock(hdev);
l2cap_connect(conn, cmd, data, L2CAP_CONN_RSP, 0);
return 0;
}