Commit Graph

426568 Commits

Author SHA1 Message Date
Johan Hedberg
3c857757ef Bluetooth: Add directed advertising support through connect()
When we're in peripheral mode (HCI_ADVERTISING flag is set) the most
natural mapping of connect() is to perform directed advertising to the
peer device.

This patch does the necessary changes to enable directed advertising and
keeps the hci_conn state as BT_CONNECT in a similar way as is done for
central or BR/EDR connection initiation.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-26 09:31:38 -07:00
Johan Hedberg
5d2e9fadf4 Bluetooth: Add scan_rsp parameter to mgmt_device_found()
In preparation for being able to merge ADV_IND/ADV_SCAN_IND and SCAN_RSP
together into a single device found event add a second parameter to the
mgmt_device_found function. For now all callers pass NULL as this
parameters since we don't yet have storing of the last received
advertising report.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-26 09:31:37 -07:00
Johan Hedberg
ca5c4be716 Bluetooth: Don't send device found events during passive scanning
Passive LE scanning is only used by the kernel-internal connection
establishment procedure. It makes therefore little sense to send device
found events to user space.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-26 09:31:36 -07:00
Johan Hedberg
43bb560583 Bluetooth: Add error mapping for Directed Advertising Timeout
When a timeout occurs using directed advertising a 0x3c error gets
generated. Since the operation is analogous to conventional connection
creation map this to the usual EHOSTDOWN error.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-26 09:31:36 -07:00
Johan Hedberg
80c24ab85f Bluetooth: Fix LE responder/initiator address setting
Once directed advertising is brought into the picture simply the lack of
an hci_conn object when an le_conn_complete event occurs is no longer a
reliable indication that the responder & initiator values need to be
set based on our advertising address type.

This patch moves the code for setting these values outside of the
"if (!conn)" branch and ensures that they get set for any connection
where we are in the slave role.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-26 09:31:35 -07:00
Johan Hedberg
9c84d1da97 Bluetooth: Move local identity address setting to a central place
Any time hci_conn_add is used for an LE connection we need to ensure
that the local identity address is correctly described in the src and
src_type variables. This patch moves setting these values directly into
hci_conn_add so that callers don't have to duplicate the effort
themselves.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-26 09:31:35 -07:00
Andre Guedes
4408dd15d9 Bluetooth: Use memdup_user in le_auto_conn_write()
This patch does a small code simplification replacing the tipical
kmalloc-copy_from_user sequence by memdup_user() helper.

Cc: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-26 09:31:34 -07:00
Johan Hedberg
4af605d8c4 Bluetooth: Refactor advertising report processing into its own function
As preparation for merging ADV_IND/ADV_SCAN_IND and SCAN_RSP together
into a single mgmt Device Found event refactor individual advertising
report handling into a separate function. This will help keep the code
more readable as more logic gets added.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-26 09:31:34 -07:00
Johan Hedberg
e8b1ab9e6d Bluetooth: Fix returning peer address in pending connect state
We should let user space request the peer address also in the pending
connect states, i.e. BT_CONNECT and BT_CONNECT2. There is existing user
space code that tries to do this and will fail without extending the set
of allowed states for the peer address information.

This patch adds the two states to the allowed ones in the L2CAP and
RFCOMM sock_getname functions, thereby preventing ENOTCONN from being
returned.

Reported-by: Andrzej Kaczmarek <andrzej.kaczmarek@tieto.com>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Tested-by: Andrzej Kaczmarek <andrzej.kaczmarek@tieto.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-26 09:31:33 -07:00
Johan Hedberg
8396215d48 Bluetooth: Remove unnecessary assignment in SMP
The smp variable in smp_conn_security is not used anywhere before the
smp = smp_chan_create() call in the smp_conn_security function so it
makes no sense to assign any other value to it before that.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-24 08:43:50 -07:00
Johan Hedberg
61b3b2b6f4 Bluetooth: Fix potential NULL pointer dereference in smp_conn_security
The smp pointer might not be initialized for jumps to the "done" label
in the smp_conn_security function. Furthermore doing the set_bit after
done might "overwrite" a previous value of the flag in case pairing was
already in progress. This patch moves the call to set_bit before the
label so that it is only done for a newly created smp context (as
returned by smp_chan_create).

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-24 08:43:47 -07:00
Johan Hedberg
1d98bf4fda Bluetooth: Remove LTK re-encryption procedure
Due to several devices being unable to handle this procedure reliably
(resulting in forced disconnections before pairing completes) it's
better to remove it altogether.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-24 07:51:56 -07:00
Johan Hedberg
a82505c7bc Bluetooth: Don't try to confirm locally initiated SMP pairing
In the case that the just-works model would be triggered we only want to
confirm remotely initiated pairings (i.e. those triggered by a Security
Request or Pairing Request). This patch adds the necessary check to the
tk_request function to fall back to the JUST_WORKS method in the case of
a locally initiated pairing.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-24 07:51:56 -07:00
Johan Hedberg
edca792c03 Bluetooth: Add SMP flag to track which side is the initiator
For remotely initiated just-works pairings we want to show the user a
confirmation dialog for the pairing. However, we can only know which
side was the initiator by tracking which side sends the first Security
Request or Pairing Request PDU. This patch adds a new SMP flag to
indicate whether our side was the initiator for the pairing.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-24 07:51:56 -07:00
Johan Hedberg
4eb65e667b Bluetooth: Fix SMP confirmation callback handling
In the case that a local pairing confirmation (JUST_CFM) has been
selected as the method we need to use the user confirm request mgmt
event for it with the confirm_hint set to 1 (to indicate confirmation
without any specific passkey value). Without this (if passkey_notify was
used) the pairing would never proceed. This patch adds the necessary
call to mgmt_user_confirm_request in this scenario.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-24 07:51:56 -07:00
Johan Hedberg
81d0c8ad71 Bluetooth: Add missing cmd_status handler for LE_Start_Encryption
It is possible that the HCI_LE_Start_Encryption command fails in an
early stage and triggers a command status event with the failure code.
In such a case we need to properly notify the hci_conn object and
cleanly bring the connection down. This patch adds the missing command
status handler for this HCI command.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-24 07:51:55 -07:00
Johan Hedberg
0a66cf2036 Bluetooth: Fix potential NULL pointer dereference in SMP
If a sudden disconnection happens the l2cap_conn pointer may already
have been cleaned up by the time hci_conn_security gets called,
resulting in the following oops if we don't have a proper NULL check:

BUG: unable to handle kernel NULL pointer dereference at 000000c8
IP: [<c132e2ed>] smp_conn_security+0x26/0x151
*pde = 00000000
Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
CPU: 1 PID: 673 Comm: memcheck-x86-li Not tainted 3.14.0-rc2+ #437
Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
task: f0ef0520 ti: f0d6a000 task.ti: f0d6a000
EIP: 0060:[<c132e2ed>] EFLAGS: 00010246 CPU: 1
EIP is at smp_conn_security+0x26/0x151
EAX: f0ec1770 EBX: f0ec1770 ECX: 00000002 EDX: 00000002
ESI: 00000002 EDI: 00000000 EBP: f0d6bdc0 ESP: f0d6bda0
 DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
CR0: 80050033 CR2: 000000c8 CR3: 30f0f000 CR4: 00000690
Stack:
 f4f55000 00000002 f0d6bdcc c1097a2b c1319f40 f0ec1770 00000002 f0d6bdd0
 f0d6bde8 c1312a82 f0d6bdfc c1312a82 c1319f84 00000008 f4d81c20 f0e5fd86
 f0ec1770 f0d6bdfc f0d6be28 c131be3b c131bdc1 f0d25270 c131be3b 00000008
Call Trace:
 [<c1097a2b>] ? __kmalloc+0x118/0x128
 [<c1319f40>] ? mgmt_pending_add+0x49/0x9b
 [<c1312a82>] hci_conn_security+0x4a/0x1dd
 [<c1312a82>] ? hci_conn_security+0x4a/0x1dd
 [<c1319f84>] ? mgmt_pending_add+0x8d/0x9b
 [<c131be3b>] pair_device+0x1e1/0x206
 [<c131bdc1>] ? pair_device+0x167/0x206
 [<c131be3b>] ? pair_device+0x1e1/0x206
 [<c131ed44>] mgmt_control+0x275/0x2d6

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-24 07:51:55 -07:00
Thomas Gleixner
d8ff9cdf68 Bluetooth: bluecard: Use del_timer_sync() in teardown path
Make sure no timer callback is running before releasing the
datastructure which contains it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-23 10:30:22 -07:00
Marcel Holtmann
533553f873 Bluetooth: Track current configured LE scan type parameter
The LE scan type paramter defines if active scanning or passive scanning
is in use. Track the currently set value so it can be used for decision
making from other pieces in the core.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-03-21 22:02:12 +02:00
Amitkumar Karwar
d986b4a648 Bluetooth: btmrvl: don't consume all vendor specific events
If vendor specific HCI commands are received from application,
we should send corresponding events to stack.
These events should be consumed in driver, only if they are for
the internal HCI commands generated by driver.

This patch fixes the vendor command 0x3f stuck problem with
above mentioned change. For example,

hcitool cmd 3f 22 fe 06 22 21 20 43 50 00

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-20 20:29:48 -07:00
Johan Hedberg
61b1a7fbda Bluetooth: Fix address value for early disconnection events
We need to ensure that we do not send events to user space with the
identity address if we have not yet notified user space of the IRK. The
code was previously trying to handle this for the mgmt_pair_device
response (which worked well enough) but this is not the only connection
related event that might be sent to user space before pairing is
successful: another important event is Device Disconnected.

The issue can actually be solved more simply than the solution
previously used for mgmt_pair_device. Since we do have the identity
address tracked as part of the remote IRK struct we can just copy it
over from there to the hci_conn struct once we've for real sent the mgmt
event for the new IRK.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-20 09:14:26 -07:00
Johan Hedberg
39adbffe4b Bluetooth: Fix passkey endianess in user_confirm and notify_passkey
The passkey_notify and user_confirm functions in mgmt.c were expecting
different endianess for the passkey, leading to a big endian bug and
sparse warning in recently added SMP code. This patch converts both
functions to expect host endianess and do the conversion to little
endian only when assigning to the mgmt event struct.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-19 23:22:07 -07:00
Marcel Holtmann
40b552aa5a Bluetooth: Enforce strict Secure Connections Only mode security
In Secure Connections Only mode, it is required that Secure Connections
is used for pairing and that the link key is encrypted with AES-CCM using
a P-256 authenticated combination key. If this is not the case, then new
connection shall be refused or existing connections shall be dropped.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-03-19 23:30:32 +02:00
Johan Hedberg
4e7b2030c4 Bluetooth: Fix Pair Device response parameters for pairing failure
It is possible that pairing fails after we've already received remote
identity information. One example of such a situation is when
re-encryption using the LTK fails. In this case the hci_conn object has
already been updated with the identity address but user space does not
yet know about it (since we didn't notify it of the new IRK yet).

To ensure user space doesn't get a Pair Device command response with an
unknown address always use the same address in the response as was used
for the original command.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-19 13:56:30 -07:00
Johan Hedberg
01ad34d267 Bluetooth: Fix SMP user passkey notification mgmt event
When performing SMP pairing with MITM protection one side needs to
enter the passkey while the other side displays to the user what needs
to be entered. Nowhere in the SMP specification does it say that the
displaying side needs to any kind of confirmation of the passkey, even
though a code comment in smp.c implies this.

This patch removes the misleading comment and converts the code to use
the passkey notification mgmt event instead of the passkey confirmation
mgmt event.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-19 13:55:06 -07:00
Johan Hedberg
5ed884d765 Bluetooth: Increase SMP re-encryption delay to 500ms
In some cases the current 250ms delay is not enough for the remote to
receive the keys, as can be witnessed by the following log:

> ACL Data RX: Handle 64 flags 0x02 dlen 21               [hci1] 231.414217
      SMP: Signing Information (0x0a) len 16
        Signature key: 555bb66b7ab3abc9d5c287c97fe6eb29
< ACL Data TX: Handle 64 flags 0x00 dlen 21               [hci1] 231.414414
      SMP: Encryption Information (0x06) len 16
        Long term key: 2a7cdc233c9a4b1f3ed31dd9843fea29
< ACL Data TX: Handle 64 flags 0x00 dlen 15               [hci1] 231.414466
      SMP: Master Identification (0x07) len 10
        EDIV: 0xeccc
        Rand: 0x322e0ef50bd9308a
< ACL Data TX: Handle 64 flags 0x00 dlen 21               [hci1] 231.414505
      SMP: Signing Information (0x0a) len 16
        Signature key: bbda1b2076e2325aa66fbcdd5388f745
> HCI Event: Number of Completed Packets (0x13) plen 5    [hci1] 231.483130
        Num handles: 1
        Handle: 64
        Count: 2
< HCI Command: LE Start Encryption (0x08|0x0019) plen 28  [hci1] 231.664211
        Handle: 64
        Random number: 0x5052ad2b75fed54b
        Encrypted diversifier: 0xb7c2
        Long term key: a336ede66711b49a84bde9b41426692e
> HCI Event: Command Status (0x0f) plen 4                 [hci1] 231.666937
      LE Start Encryption (0x08|0x0019) ncmd 1
        Status: Success (0x00)
> HCI Event: Number of Completed Packets (0x13) plen 5    [hci1] 231.712646
        Num handles: 1
        Handle: 64
        Count: 1
> HCI Event: Disconnect Complete (0x05) plen 4            [hci1] 232.562587
        Status: Success (0x00)
        Handle: 64
        Reason: Remote User Terminated Connection (0x13)

As can be seen, the last key (Signing Information) is sent at 231.414505
but the completed packets event for it comes only at 231.712646,
i.e. roughly 298ms later.

To have a better margin of error this patch increases the delay to
500ms.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-19 13:55:06 -07:00
Johan Hedberg
18e4aeb9b8 Bluetooth: Simplify logic when checking SMP_FLAG_TK_VALID
This is a trivial coding style simplification by instead of having an
extra early return to instead revert the if condition and do the single
needed queue_work() call there.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-19 13:55:05 -07:00
Johan Hedberg
2e2336445e Bluetooth: Fix MITM flag when initiating SMP pairing
The pairing process initiated through mgmt sets the conn->auth_type
value regardless of BR/EDR or LE pairing. This value will contain the
MITM flag if the local IO capability allows it. When sending the SMP
pairing request we should check the value and ensure that the MITM bit
gets correctly set in the bonding flags.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 10:18:26 -07:00
Johan Hedberg
943a732ab6 Bluetooth: Fix smp_e byte order to be consistent with SMP specification
The SMP specification is written with the assumption that both key
information, plaintextData and encryptedData follow the same little
endian byte ordering as the rest of SMP.

Since the kernel crypto routines expect big endian data the code has had
to do various byte swapping tricks to make the behavior as expected,
however the swapping has been scattered all around the place.

This patch centralizes the byte order swapping into the smp_e function
by making its public interface match what the other SMP functions expect
as per specification. The benefit is vastly simplified calls to smp_e.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 10:18:26 -07:00
Johan Hedberg
66bed1a24e Bluetooth: Fix const declaration for swap function src parameter
To make it possible to (correctly) pass data declared as const as the
src parameter to the swap56 and swap128 functions declare this parameter
also as const.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-18 10:18:26 -07:00
Johan Hedberg
fdcc4beccb Bluetooth: Fix updating SMP remote key distribution information
When performing pairing using SMP the remote may clear any key
distribution bits it wants in its pairing response. We must therefore
update our local variable accordingly, otherwise we might get stuck
waiting for keys that will never come.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-14 09:05:24 -07:00
Arnd Bergmann
52d3ef5c25 Bluetooth: make sure 6LOWPAN_IPHC is built-in if needed
Commit 975508879 "Bluetooth: make bluetooth 6lowpan as an option"
ensures that 6LOWPAN_IPHC is turned on when we have BT_6LOWPAN
enabled in Kconfig, but it allows building the IPHC code as
a loadable module even if the entire Bluetooth stack is built-in,
and that causes a link error.

We can solve that by moving the 'select' statement into CONFIG_BT,
which is a "tristate" option to enforce that 6LOWPAN_IPHC can
only be a module if BT also is a module.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-13 07:05:10 -07:00
Joe Perches
dcf4adbfdc Bluetooth: Convert uses of __constant_<foo> to <foo>
The use of __constant_<foo> has been unnecessary for quite awhile now.

Make these uses consistent with the rest of the kernel.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-12 11:10:17 -07:00
Andre Guedes
4340a124de Bluetooth: Enable duplicates filter in background scan
To avoid flooding the host with useless advertising reports during
background scan, we enable the duplicates filter from controller.

However, enabling duplicates filter requires a small change in
background scan routine in order to fix the following scenario:
  1) Background scan is running.
  2) A device disconnects and starts advertising.
  3) Before host gets the disconnect event, the advertising is reported
     to host. Since there is no pending LE connection at that time,
     nothing happens.
  4) Host gets the disconnection event and adds a pending connection.
  5) No advertising is reported (since controller is filtering) and the
     connection is never established.

So, to address this scenario, we should always restart background scan
to unsure we don't miss any advertising report (due to duplicates
filter).

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-11 12:59:04 -07:00
Andrew Earl
27539bc441 Bluetooth: Fix aborting eSCO connection in case of error 0x20
Add additional error case to attempt alternative configuration for SCO. Error
occurs with Intel BT controller where fallback is not attempted as the error
0x20 Unsupported LMP Parameter value is not included in the list of errors
where a retry should be attempted.
The problem also affects PTS test case TC_HF_ACS_BV_05_I.

See the HCI log below for details:
< HCI Command: Setup Synchronous Connection (0x01|0x0028) plen 17
    handle 256 voice setting 0x0060 ptype 0x0380
> HCI Event: Command Status (0x0f) plen 4
    Setup Synchronous Connection (0x01|0x0028) status 0x00 ncmd 1
> HCI Event: Max Slots Change (0x1b) plen 3
    handle 256 slots 1
> HCI Event: Synchronous Connect Complete (0x2c) plen 17
    status 0x20 handle 0 bdaddr 00:80:98:09:0B:19 type eSCO
    Error: Unsupported LMP Parameter Value
< HCI Command: Setup Synchronous Connection (0x01|0x0028) plen 17
    handle 256 voice setting 0x0060 ptype 0x0380
> HCI Event: Command Status (0x0f) plen 4
    Setup Synchronous Connection (0x01|0x0028) status 0x00 ncmd 1
> HCI Event: Max Slots Change (0x1b) plen 3
    handle 256 slots 5
> HCI Event: Synchronous Connect Complete (0x2c) plen 17
    status 0x20 handle 0 bdaddr 00:80:98:09:0B:19 type eSCO
    Error: Unsupported LMP Parameter Value
< HCI Command: Setup Synchronous Connection (0x01|0x0028) plen 17
    handle 256 voice setting 0x0060 ptype 0x03c8
> HCI Event: Command Status (0x0f) plen 4
    Setup Synchronous Connection (0x01|0x0028) status 0x00 ncmd 1
> HCI Event: Max Slots Change (0x1b) plen 3
    handle 256 slots 1
> HCI Event: Synchronous Connect Complete (0x2c) plen 17
    status 0x00 handle 257 bdaddr 00:80:98:09:0B:19 type eSCO
    Air mode: CVSD

See btmon log for further details:
> HCI Event (0x0f) plen 4 [hci0] 44.888063
      Setup Synchronous Connection (0x01|0x0028) ncmd 1
        Status: Success (0x00)
> HCI Event (0x1b) plen 3 [hci0] 44.893064
        Handle: 256
        Max slots: 1
> HCI Event (0x2c) plen 17 [hci0] 44.942080
        Status: Unsupported LMP Parameter Value (0x20)
        Handle: 0
        Address: 00:1B:DC:06:04:B0 (OUI 00-1B-DC)
        Link type: eSCO (0x02)
        Transmission interval: 0x00
        Retransmission window: 0x01
        RX packet length: 0
        TX packet length: 0
        Air mode: CVSD (0x02)
> HCI Event (0x1b) plen 3 [hci0] 44.948054
        Handle: 256
        Max slots: 5

Signed-off-by: Andrew Earl <andrewx.earl@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-11 08:16:45 -07:00
Alexander Aring
9755088797 Bluetooth: make bluetooth 6lowpan as an option
Currently you can have bluetooth 6lowpan without ipv6 enabled. This
doesn't make any sense. With this patch you can disable/enable bluetooth
6lowpan support at compile time.

The current bluetooth 6lowpan implementation doesn't check the return
value of 6lowpan function. Nevertheless I added -EOPNOTSUPP as return value
if 6lowpan bluetooth is disabled.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-11 07:54:55 -07:00
Marcel Holtmann
53ac6ab612 Bluetooth: Make LTK and CSRK only persisent when bonding
In case the pairable option has been disabled, the pairing procedure
does not create keys for bonding. This means that these generated keys
should not be stored persistently.

For LTK and CSRK this is important to tell userspace to not store these
new keys. They will be available for the lifetime of the device, but
after the next power cycle they should not be used anymore.

Inform userspace to actually store the keys persistently only if both
sides request bonding.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-03-10 14:57:33 +02:00
Marcel Holtmann
7ee4ea3692 Bluetooth: Add support for handling signature resolving keys
The connection signature resolving key (CSRK) is used for attribute
protocol signed write procedures. This change generates a new local
key during pairing and requests the peer key as well.

Newly generated key and received key will be provided to userspace
using the New Signature Resolving Key management event.

The Master CSRK can be used for verification of remote signed write
PDUs and the Slave CSRK can be used for sending signed write PDUs
to the remote device.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-03-09 21:39:50 +02:00
Gustavo Padovan
0753c182ef Bluetooth: Fix skb allocation check for A2MP
vtable's method alloc_skb() needs to return a ERR_PTR in case of err and
not a NULL.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-03-07 20:09:41 +02:00
Peng Chen
b9e2535aca Bluetooth: Fix endianess issue in the ath3k driver
The version is always in little endian format. This patch makes the
driver work on both little and big endian CPUs.

Signed-off-by: Peng Chen <pengchen@qca.qualcomm.com>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-03-07 20:09:40 +02:00
Johan Hedberg
2606ecbc48 Bluetooth: Fix expected key count debug logs
The debug logs for reporting a discrepancy between the expected amount
of keys and the actually received amount of keys got these value mixed
up. This patch fixes the issue.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-03-07 09:49:12 -08:00
Peng Chen
ca58e594da Bluetooth: Add a new PID/VID 0cf3/e005 for AR3012.
usb devices info:

T:  Bus=06 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 13 Spd=12   MxCh= 0
D:  Ver= 1.10 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=0cf3 ProdID=e005 Rev= 0.02
C:* #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=(none)
E:  Ad=81(I) Atr=03(Int.) MxPS=  16 Ivl=1ms
E:  Ad=82(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=(none)
E:  Ad=83(I) Atr=01(Isoc) MxPS=   0 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=   0 Ivl=1ms
I:  If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=(none)
E:  Ad=83(I) Atr=01(Isoc) MxPS=   9 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=   9 Ivl=1ms
I:  If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=(none)
E:  Ad=83(I) Atr=01(Isoc) MxPS=  17 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=  17 Ivl=1ms
I:  If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=(none)
E:  Ad=83(I) Atr=01(Isoc) MxPS=  25 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=  25 Ivl=1ms
I:  If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=(none)
E:  Ad=83(I) Atr=01(Isoc) MxPS=  33 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=  33 Ivl=1ms
I:  If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=(none)
E:  Ad=83(I) Atr=01(Isoc) MxPS=  49 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=  49 Ivl=1ms

Signed-off-by: Peng Chen <pengchen@qca.qualcomm.com>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-03-05 20:52:17 +02:00
Valentin Ilie
a08b15e66e Bluetooth: Remove assignments in if-statements
Remove assignment in if-statements to be consistent with the coding
style.

Signed-off-by: Valentin Ilie <valentin.ilie@gmail.com>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-03-05 20:52:17 +02:00
Claudio Takahasi
5981a8821b Bluetooth: Fix removing Long Term Key
This patch fixes authentication failure on LE link re-connection when
BlueZ acts as slave (peripheral). LTK is removed from the internal list
after its first use causing PIN or Key missing reply when re-connecting
the link. The LE Long Term Key Request event indicates that the master
is attempting to encrypt or re-encrypt the link.

Pre-condition: BlueZ host paired and running as slave.
How to reproduce(master):

  1) Establish an ACL LE encrypted link
  2) Disconnect the link
  3) Try to re-establish the ACL LE encrypted link (fails)

> HCI Event: LE Meta Event (0x3e) plen 19
      LE Connection Complete (0x01)
        Status: Success (0x00)
        Handle: 64
        Role: Slave (0x01)
...
@ Device Connected: 00:02:72:DC:29:C9 (1) flags 0x0000
> HCI Event: LE Meta Event (0x3e) plen 13
      LE Long Term Key Request (0x05)
        Handle: 64
        Random number: 875be18439d9aa37
        Encryption diversifier: 0x76ed
< HCI Command: LE Long Term Key Request Reply (0x08|0x001a) plen 18
        Handle: 64
        Long term key: 2aa531db2fce9f00a0569c7d23d17409
> HCI Event: Command Complete (0x0e) plen 6
      LE Long Term Key Request Reply (0x08|0x001a) ncmd 1
        Status: Success (0x00)
        Handle: 64
> HCI Event: Encryption Change (0x08) plen 4
        Status: Success (0x00)
        Handle: 64
        Encryption: Enabled with AES-CCM (0x01)
...
@ Device Disconnected: 00:02:72:DC:29:C9 (1) reason 3
< HCI Command: LE Set Advertise Enable (0x08|0x000a) plen 1
        Advertising: Enabled (0x01)
> HCI Event: Command Complete (0x0e) plen 4
      LE Set Advertise Enable (0x08|0x000a) ncmd 1
        Status: Success (0x00)
> HCI Event: LE Meta Event (0x3e) plen 19
      LE Connection Complete (0x01)
        Status: Success (0x00)
        Handle: 64
        Role: Slave (0x01)
...
@ Device Connected: 00:02:72:DC:29:C9 (1) flags 0x0000
> HCI Event: LE Meta Event (0x3e) plen 13
      LE Long Term Key Request (0x05)
        Handle: 64
        Random number: 875be18439d9aa37
        Encryption diversifier: 0x76ed
< HCI Command: LE Long Term Key Request Neg Reply (0x08|0x001b) plen 2
        Handle: 64
> HCI Event: Command Complete (0x0e) plen 6
      LE Long Term Key Request Neg Reply (0x08|0x001b) ncmd 1
        Status: Success (0x00)
        Handle: 64
> HCI Event: Disconnect Complete (0x05) plen 4
        Status: Success (0x00)
        Handle: 64
        Reason: Authentication Failure (0x05)
@ Device Disconnected: 00:02:72:DC:29:C9 (1) reason 0

Signed-off-by: Claudio Takahasi <claudio.takahasi@openbossa.org>
Cc: stable@vger.kernel.org
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-03-05 19:41:20 +02:00
Michael Knudsen
c327cddd18 Bluetooth: Stop BCSP/H5 timer before cleaning up
When stopping BCSP/H5, stop the retransmission timer before proceeding
to clean up packet queues.  The previous code had a race condition where
the timer could trigger after the packet lists and protocol structure
had been removed which led to dereferencing NULL or use-after-free bugs.

Signed-off-by: Michael Knudsen <m.knudsen@samsung.com>
Reported-by: Kirill Tkhai <ktkhai@parallels.com>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-03-04 11:03:14 +02:00
Johan Hedberg
81ad6fd969 Bluetooth: Remove unnecessary stop_scan_complete function
The stop_scan_complete function was used as an intermediate step before
doing the actual connection creation. Since we're using hci_request
there's no reason to have this extra function around, i.e. we can simply
put both HCI commands into the same request.

The single task that the intermediate function had, i.e. indicating
discovery as stopped is now taken care of by a new
HCI_LE_SCAN_INTERRUPTED flag which allows us to do the discovery state
update when the stop scan command completes.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-28 10:28:17 -08:00
Johan Hedberg
317ac8cb3f Bluetooth: Fix trying to disable scanning twice
The discovery process has a timer for disabling scanning, however
scanning might be disabled through other means too like the auto-connect
process.  We should therefore ensure that the timer is never active
after sending a HCI command to disable scanning.

There was some existing code in stop_scan_complete trying to avoid the
timer when a connect request interrupts a discovery procedure, but the
other way around was not covered. This patch covers both scenarios by
canceling the timer as soon as we get a successful command complete for
the disabling HCI command.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-28 10:28:16 -08:00
Johan Hedberg
e3098be40b Bluetooth: Delay LTK encryption to let remote receive all keys
Some devices may refuse to re-encrypt with the LTK if they haven't
received all our keys yet. This patch adds a 250ms delay before
attempting re-encryption with the LTK.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-28 08:17:46 -08:00
Johan Hedberg
38ccdc9332 Bluetooth: Re-encrypt link after receiving an LTK
It's not strictly speaking required to re-encrypt a link once we receive
an LTK since the connection is already encrypted with the STK. However,
re-encrypting with the LTK allows us to verify that we've received an
LTK that actually works.

This patch updates the SMP code to request encrypting with the LTK in
case we're in master role and waits until the key refresh complete event
before notifying user space of the distributed keys.

A new flag is also added for the SMP context to ensure that we
re-encryption only once in case of multiple calls to smp_distribute_keys.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-28 08:17:46 -08:00
Johan Hedberg
9489eca4ab Bluetooth: Add timeout for LE connection attempts
LE connection attempts do not have a controller side timeout in the same
way as BR/EDR has (in form of the page timeout). Since we always do
scanning before initiating connections the attempts are always expected
to succeed in some reasonable time.

This patch adds a timer which forces a cancellation of the connection
attempt within 20 seconds if it has not been successful by then. This
way we e.g. ensure that mgmt_pair_device times out eventually and gives
an error response.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-02-28 07:56:42 -08:00