Commit Graph

412211 Commits

Author SHA1 Message Date
Alexander Aring
e5d966eff3 6lowpan: fix udp byte ordering
The incoming udp header in lowpan_compress_udp_header function is
already in network byte order.

Everytime we read this values for source and destination port we need
to convert this value to host byte order.

In the outcoming header we need to set this value in network byte order
which the upcoming process assumes.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-17 06:16:48 -08:00
Alexander Aring
95277eb1cd 6lowpan: fix udp compress ordering
In case ((ntohs(uh->source) & LOWPAN_NHC_UDP_8BIT_MASK) the order of
uncompression is wrong. It's always first source port then destination
port as second.

See:
http://tools.ietf.org/html/rfc6282#section-4.3.3

"Fields carried in-line (in part or in whole) appear in the same order
as they do in the UDP header format"

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-17 06:16:47 -08:00
Alexander Aring
5cede84c98 6lowpan: udp use lowpan_push_hc_data function
This patch uses the lowpan_push_hc_data to generate iphc header.

The current implementation has some wrong pointer arithmetic issues and
works in a random case only.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-17 06:16:47 -08:00
Alexander Aring
3109f2e28b 6lowpan: introduce lowpan_push_hc_data function
This patch introduce the lowpan_push_hc_data function to set data in
the iphc buffer.

It's a common case to set data and increase the buffer pointer. This
helper function can be used many times in header_compress function to
generate the iphc header.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-17 06:16:47 -08:00
Wei Yongjun
787949039f Bluetooth: fix return value check
In case of error, the function bt_skb_alloc() returns NULL pointer
not ERR_PTR(). The IS_ERR() test in the return value check should
be replaced with NULL test.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-14 06:49:14 -08:00
Wei Yongjun
05c75e3671 Bluetooth: remove unused including <linux/version.h>
Remove including <linux/version.h> that don't need it.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-14 01:42:06 -08:00
Alexander Aring
841a5ec72c 6lowpan: fix/move/cleanup debug functions
There are several issues on current debug behaviour.
This patch fix the following issues:

- Fix debug printout only if DEBUG is defined.
- Move debug functions of 6LoWPAN code into 6lowpan header.
- Cleanup codestyle of debug functions.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-12 12:14:54 -08:00
Johan Hedberg
30d3db44bb Bluetooth: Fix test for lookup_dev return value
The condition wouldn't have previously caused -ENOENT to be returned if
dev was NULL. The proper condition should be if (!dev || !dev->netdev).

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-11 23:59:21 -08:00
Johan Hedberg
d0746f3ecc Bluetooth: Add missing 6lowpan.h include
The 6lowpan.c file was missing an #include statement for 6lowpan.h.
Without it we get the following type of warnings:

net/bluetooth/6lowpan.c:320:5: warning: symbol 'bt_6lowpan_recv' was not declared. Should it be static?
net/bluetooth/6lowpan.c:737:5: warning: symbol 'bt_6lowpan_add_conn' was not declared. Should it be static?
net/bluetooth/6lowpan.c:805:5: warning: symbol 'bt_6lowpan_del_conn' was not declared. Should it be static?
net/bluetooth/6lowpan.c:878:5: warning: symbol 'bt_6lowpan_init' was not declared. Should it be static?
net/bluetooth/6lowpan.c:883:6: warning: symbol 'bt_6lowpan_cleanup' was not declared. Should it be static?

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-11 23:59:21 -08:00
Jukka Rissanen
89863109e3 Bluetooth: Manually enable or disable 6LoWPAN between devices
This is a temporary patch where user can manually enable or
disable BT 6LoWPAN functionality between devices.
Eventually the connection is established automatically if
the devices are advertising suitable capability and this patch
can be removed.

Before connecting the devices do this

echo Y > /sys/kernel/debug/bluetooth/hci0/6lowpan

This enables 6LoWPAN support and creates the bt0 interface
automatically when devices are finally connected.

Rebooting or unloading the bluetooth kernel module will also clear the
settings from the kernel.

Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-11 12:57:55 -08:00
Jukka Rissanen
18722c2470 Bluetooth: Enable 6LoWPAN support for BT LE devices
This is initial version of
http://tools.ietf.org/html/draft-ietf-6lo-btle-00

By default the 6LoWPAN support is not activated and user
needs to tweak /sys/kernel/debug/bluetooth/hci0/6lowpan
file.

The kernel needs IPv6 support before 6LoWPAN is usable.

Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-11 12:57:55 -08:00
Jukka Rissanen
e74bccb8a5 ipv6: Add checks for 6LOWPAN ARP type
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-11 12:57:55 -08:00
Jukka Rissanen
0abc652c79 net: if_arp: add ARPHRD_6LOWPAN type
Used for IPv6 over LoWPAN networks. Example of this is
Bluetooth 6LoWPAN network.

Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-11 12:57:55 -08:00
Jukka Rissanen
8df8c56a5a 6lowpan: Moving generic compression code into 6lowpan_iphc.c
Because the IEEE 802154 and Bluetooth share the IP header compression
and uncompression code, the common code is moved to 6lowpan_iphc.c
file.

Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Acked-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-11 12:57:54 -08:00
Johan Hedberg
71fb419724 Bluetooth: Fix handling of L2CAP Command Reject over LE
If we receive an L2CAP command reject message over LE we should take
appropriate action on the corresponding channel. This is particularly
important when trying to interact with a remote pre-4.1 system using LE
CoC signaling messages. If we don't react to the command reject the
corresponding socket would not be notified until a connection timeout
occurs.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-10 01:15:44 -08:00
Marcel Holtmann
53b834d233 Bluetooth: Use macros for connectionless slave broadcast features
Add the LMP feature constants for connectionless slave broadcast
and use them for capability testing.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2013-12-09 00:02:41 +04:00
Marcel Holtmann
c6d1649050 Bluetooth: Increase minor version of core module
With the addition of L2CAP Connection Oriented Channels for Bluetooth
Low Energy connections, it makes sense to increase the minor version
of the Bluetooth core module.

The module version is not used anywhere, but it gives a nice extra
hint for debugging purposes.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2013-12-07 21:29:43 +04:00
Johan Hedberg
c8afe8d0ad Bluetooth: Fix valid LE PSM check
The range of valid LE PSMs is 0x0001-0x00ff so the check should be for
"less than or equal to" instead of "less than".

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 22:07:42 -08:00
Johan Hedberg
f1324ea50b Bluetooth: Use min_t for calculating chan->mps
Since there's a nice convenient helper for calculating the minimum of
two values, let's use that one.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 22:07:42 -08:00
Johan Hedberg
0ce43ce60d Bluetooth: Simplify l2cap_chan initialization for LE CoC
The values in l2cap_chan that are used for actually transmitting data
only need to be initialized right after we've received an L2CAP Connect
Request or just before we send one. The only thing that we need to
initialize though bind() and connect() is the chan->mode value. This way
all other initializations can be done in the l2cap_le_flowctl_init
function (which now becomes private to l2cap_core.c) and the
l2cap_le_flowctl_start function can be completely removed.

Also, since the l2cap_sock_init function initializes the imtu and omtu
to adequate values these do not need to be part of l2cap_le_flowctl_init.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:36 -08:00
Johan Hedberg
f15b8ecf98 Bluetooth: Add debugfs controls for LE CoC MPS and Credits
This patch adds entries to debugfs to control the values used for the
MPS and Credits for LE Flow Control Mode.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:36 -08:00
Johan Hedberg
4946096d43 Bluetooth: Fix validating LE PSM values
LE PSM values have different ranges than those for BR/EDR. The valid
ranges for fixed, SIG assigned values is 0x0001-0x007f and for dynamic
PSM values 0x0080-0x00ff. We need to ensure that bind() and connect()
calls conform to these ranges when operating on LE CoC sockets.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:36 -08:00
Johan Hedberg
e77af75592 Bluetooth: Fix CID ranges for LE CoC CID allocations
LE CoC used differend CIC ranges than BR/EDR L2CAP. The start of the
range is the same (0x0040) but the range ends at 0x007f (unlike BR/EDR
where it goes all the way to 0xffff).

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:36 -08:00
Johan Hedberg
aeddd075d5 Bluetooth: Fix clearing of chan->omtu for LE CoC channels
The outgoing MTU should only be set upon channel creation to the initial
minimum value (23) or from a remote connect req/rsp PDU.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:35 -08:00
Johan Hedberg
3916aed81f Bluetooth: Limit LE MPS to the MTU value
It doesn't make sense to have an MPS value greater than the configured
MTU value since we will then not be able to fill up the packets to their
full possible size. We need to set the MPS both in flowctl_init()
as well as flowctl_start() since the imtu may change after init() but
start() is only called after we've sent the LE Connection Request PDU
which depends on having a valid MPS value.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:35 -08:00
Johan Hedberg
029727a39a Bluetooth: Fix suspending the L2CAP socket if we start with 0 credits
If the peer gives us zero credits in its connection request or response
we must call the suspend channel callback so the BT_SK_SUSPEND flag gets
set and user space is blocked from sending data to the socket.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:35 -08:00
Johan Hedberg
595177f311 Bluetooth: Fix LE L2CAP Connect Request handling together with SMP
Unlike BR/EDR, for LE when we're in the BT_CONNECT state we may or may
not have already have sent the Connect Request. This means that we need
some extra tracking of the request. This patch adds an extra channel
flag to prevent the request from being sent a second time.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:35 -08:00
Johan Hedberg
aac23bf636 Bluetooth: Implement LE L2CAP reassembly
When receiving fragments over an LE Connection oriented Channel they
need to be collected up and eventually merged into a single SDU. This
patch adds the necessary code for collecting up the fragment skbs to the
channel context and passing them to the recv() callback when the entire
SDU has been received.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:35 -08:00
Johan Hedberg
177f8f2b12 Bluetooth: Add LE L2CAP segmentation support for outgoing data
This patch adds segmentation support for outgoing data packets. Packets
are segmented based on the MTU and MPS values. The l2cap_chan struct
already contains many helpful variables from BR/EDR Enhanced L2CAP which
can be used for this.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:35 -08:00
Johan Hedberg
837776f790 Bluetooth: Introduce L2CAP channel callback for suspending
Setting the BT_SK_SUSPEND socket flag from the L2CAP core is causing a
dependency on the socket. So instead of doing that, use a channel
callback into the socket handling to suspend.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:35 -08:00
Johan Hedberg
3af8ace653 Bluetooth: Reject LE CoC commands when the feature is not enabled
Since LE CoC support needs to be enabled through a module option for now
we need to reject any related signaling PDUs in addition to rejecting
the creation of LE CoC sockets (which we already do).

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:34 -08:00
Johan Hedberg
fad5fc8959 Bluetooth: Add LE flow control discipline
This patch adds the necessary discipline for reacting to LE L2CAP
Credits packets, sending those packets, and modifying the known credits
accordingly.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:34 -08:00
Johan Hedberg
b1c325c23d Bluetooth: Implement returning of LE L2CAP credits
We should return credits to the remote side whenever they fall below a
certain level (in our case under half of the initially given amount).

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:34 -08:00
Johan Hedberg
1f435424ce Bluetooth: Add new BT_SNDMTU and BT_RCVMTU socket options
This patch adds new socket options for LE sockets since the existing
L2CAP_OPTIONS socket option is not usable for LE. For now, the new
socket options also require LE CoC support to be explicitly enabled to
leave some playroom in case something needs to be changed in a backwards
incompatible way.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:34 -08:00
Johan Hedberg
64b4f8dc76 Bluetooth: Limit L2CAP_OPTIONS socket option usage with LE
Most of the values in L2CAP_OPTIONS are not applicable for LE and those
that are have different semantics. It makes therefore sense to
completely block this socket option for LE and add (in a separate patch)
a new socket option for tweaking the values that do make sense (mainly
the send and receive MTU). Legacy user space ATT code still depends on
getsockopt for L2CAP_OPTIONS though so we need to plug a hole for that
for backwards compatibility.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:34 -08:00
Johan Hedberg
0cd75f7ed7 Bluetooth: Track LE L2CAP credits in l2cap_chan
This patch adds tracking of L2CAP connection oriented channel local and
remote credits to struct l2cap_chan and ensures that connect requests
and responses contain the right values.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:34 -08:00
Johan Hedberg
3831971355 Bluetooth: Add LE L2CAP flow control mode
The LE connection oriented channels have their own mode with its own
data transfer rules. In order to implement this properly we need to
distinguish L2CAP channels operating in this mode from other modes.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:34 -08:00
Johan Hedberg
b5ecba6422 Bluetooth: Make l2cap_le_sig_cmd logic consistent
This patch makes the error handling and return logic of l2cap_le_sig_cmd
consistent with its BR/EDR counterpart.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:33 -08:00
Johan Hedberg
3defe01a48 Bluetooth: Add L2CAP Disconnect suppport for LE
The normal L2CAP Disconnect request and response are also used for LE
connection oriented channels. Therefore, we can simply use the existing
handler functions for terminating LE based L2CAP channels.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:33 -08:00
Johan Hedberg
cea04ce35e Bluetooth: Fix L2CAP channel closing for LE connections
Sending of the L2CAP Disconnect request should also be performed for LE
based channels. The proper thing to do is therefore to look at whether
there's a PSM specified for the channel instead of looking at the link
type.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:33 -08:00
Johan Hedberg
27e2d4c8d2 Bluetooth: Add basic LE L2CAP connect request receiving support
This patch adds the necessary boiler plate code to handle receiving
L2CAP connect requests over LE and respond to them with a proper connect
response.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:33 -08:00
Johan Hedberg
791d60f71a Bluetooth: Refactor L2CAP connect rejection to its own function
We'll need to have a separate code path for LE based connection
rejection so it's cleaner to move out the response construction code
into its own function (and later a second one for LE).

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:33 -08:00
Johan Hedberg
ad32a2f5ce Bluetooth: Add smp_sufficient_security helper function
This function is needed both by the smp_conn_security function as well
as upcoming code to check for the security requirements when receiving
an L2CAP connect request over LE.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:33 -08:00
Johan Hedberg
f1496dee9c Bluetooth: Add initial code for LE L2CAP Connect Request
This patch adds the necessary code to send an LE L2CAP Connect Request
and handle its response when user space has provided us with an LE
socket with a PSM instead of a fixed CID.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:33 -08:00
Johan Hedberg
ee5ec5cf00 Bluetooth: Add definitions for LE connection oriented channels
This patch adds the necessary defines and structs for LE connection
oriented channels.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:32 -08:00
Johan Hedberg
96ac34fb40 Bluetooth: Move LE L2CAP initiator procedure to its own function
Once connection oriented L2CAP channels over LE are supported they will
need a completely separate handling from BR/EDR channels.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:32 -08:00
Johan Hedberg
203e639ecb Bluetooth: Pass command length to LE signaling channel handlers
The LE signaling PDU length is already calculated in the
l2cap_le_sig_channel function so we can just pass the value to the
various handler functions to avoid unnecessary recalculations (byte
order conversions). Right now the only user is the connection parameter
update procedure, but as new LE signaling operations become available
(for connection oriented channels) they will also be able to make use of
the value.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:32 -08:00
Johan Hedberg
a17de2fe02 Bluetooth: Allow l2cap_chan_check_security() to be used for LE links.
With connection oriented L2CAP channels some code paths will be shared
with BR/EDR links. It is therefore necessary to allow the
l2cap_chan_check_security function to be usable also for LE links in
addition to BR/EDR ones. This means that smp_conn_security() needs to be
called instead of hci_conn_security() in the case of an LE link.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:32 -08:00
Johan Hedberg
bf20fd4ec1 Bluetooth: Update l2cap_global_chan_by_psm() to take a link type
Once connection oriented L2CAP channels become possible for LE we need
to be able to specify the link type we're interested in when looking up
L2CAP channels. Therefore, add a link_type parameter to the
l2cap_global_chan_by_psm() function which gets compared to the address
type associated with each l2cap_chan.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:32 -08:00
Johan Hedberg
9149761ad7 Bluetooth: Add module parameter to enable LE CoC support
Along with the L2CAP Connection Oriented Channels features it is now
allowed to use both custom fixed CIDs as well as PSM based (connection
oriented connections). Since the support for this (with the subsequent
patches) is still on an experimental stage, add a module parameter to
enable it.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2013-12-05 07:05:32 -08:00