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2014-01-18net: add build-time checks for msg->msg_name sizeSteffen Hurrle
This is a follow-up patch to f3d3342602f8bc ("net: rework recvmsg handler msg_name and msg_namelen logic"). DECLARE_SOCKADDR validates that the structure we use for writing the name information to is not larger than the buffer which is reserved for msg->msg_name (which is 128 bytes). Also use DECLARE_SOCKADDR consistently in sendmsg code paths. Signed-off-by: Steffen Hurrle <steffen@hurrle.net> Suggested-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-01-17Bluetooth: remove direct compilation of 6lowpan_iphc.cStephen Warren
It's now built as a separate utility module, and enabling BT selects that module in Kconfig. This fixes: net/ieee802154/built-in.o:(___ksymtab_gpl+lowpan_process_data+0x0): multiple definition of `__ksymtab_lowpan_process_data' net/bluetooth/built-in.o:(___ksymtab_gpl+lowpan_process_data+0x0): first defined here net/ieee802154/built-in.o:(___ksymtab_gpl+lowpan_header_compress+0x0): multiple definition of `__ksymtab_lowpan_header_compress' net/bluetooth/built-in.o:(___ksymtab_gpl+lowpan_header_compress+0x0): first defined here net/ieee802154/built-in.o: In function `lowpan_header_compress': net/ieee802154/6lowpan_iphc.c:606: multiple definition of `lowpan_header_compress' net/bluetooth/built-in.o:/home/swarren/shared/git_wa/kernel/kernel.git/net/bluetooth/../ieee802154/6lowpan_iphc.c:606: first defined here net/ieee802154/built-in.o: In function `lowpan_process_data': net/ieee802154/6lowpan_iphc.c:344: multiple definition of `lowpan_process_data' net/bluetooth/built-in.o:/home/swarren/shared/git_wa/kernel/kernel.git/net/bluetooth/../ieee802154/6lowpan_iphc.c:344: first defined here make[1]: *** [net/built-in.o] Error 1 (this change probably simply wasn't "git add"d to a53d34c3465b) Fixes: a53d34c3465b ("net: move 6lowpan compression code to separate module") Fixes: 18722c247023 ("Bluetooth: Enable 6LoWPAN support for BT LE devices") Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-01-15net: move 6lowpan compression code to separate moduleDmitry Eremin-Solenikov
IEEE 802.15.4 and Bluetooth networking stacks share 6lowpan compression code. Instead of introducing Makefile/Kconfig hacks, build this code as a separate module referenced from both ieee802154 and bluetooth modules. This fixes the following build error observed in some kernel configurations: net/built-in.o: In function `header_create': 6lowpan.c:(.text+0x166149): undefined reference to `lowpan_header_compress' net/built-in.o: In function `bt_6lowpan_recv': (.text+0x166b3c): undefined reference to `lowpan_process_data' Reported-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Dmitry Eremin-Solenikov <dmitry_eremin@mentor.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-01-10Merge branch 'master' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem Conflicts: net/ieee802154/6lowpan.c
2014-01-08Merge branch 'for-upstream' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next
2014-01-07Bluetooth: Fix 6loWPAN peer lookupClaudio Takahasi
This patch fixes peer address lookup for 6loWPAN over Bluetooth Low Energy links. ADDR_LE_DEV_PUBLIC, and ADDR_LE_DEV_RANDOM are the values allowed for "dst_type" field in the hci_conn struct for LE links. Signed-off-by: Claudio Takahasi <claudio.takahasi@openbossa.org> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
2014-01-07Bluetooth: Fix setting Universal/Local bitClaudio Takahasi
This patch fixes the Bluetooth Low Energy Address type checking when setting Universal/Local bit for the 6loWPAN network device or for the peer device connection. ADDR_LE_DEV_PUBLIC or ADDR_LE_DEV_RANDOM are the values allowed for "src_type" and "dst_type" in the hci_conn struct. The Bluetooth link type can be obtainned reading the "type" field in the same struct. Signed-off-by: Claudio Takahasi <claudio.takahasi@openbossa.org> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
2014-01-06Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
Conflicts: drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c net/ipv6/ip6_tunnel.c net/ipv6/ip6_vti.c ipv6 tunnel statistic bug fixes conflicting with consolidation into generic sw per-cpu net stats. qlogic conflict between queue counting bug fix and the addition of multiple MAC address support. Signed-off-by: David S. Miller <davem@davemloft.net>
2014-01-06Bluetooth: Remove rfcomm_carrier_raised()Gianluca Anzolin
Remove the rfcomm_carrier_raised() definition as that function isn't used anymore. Signed-off-by: Gianluca Anzolin <gianluca@sottospazio.it> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-01-06Bluetooth: Always wait for a connection on RFCOMM open()Gianluca Anzolin
This patch fixes two regressions introduced with the recent rfcomm tty rework. The current code uses the carrier_raised() method to wait for the bluetooth connection when a process opens the tty. However processes may open the port with the O_NONBLOCK flag or set the CLOCAL termios flag: in these cases the open() syscall returns immediately without waiting for the bluetooth connection to complete. This behaviour confuses userspace which expects an established bluetooth connection. The patch restores the old behaviour by waiting for the connection in rfcomm_dev_activate() and removes carrier_raised() from the tty_port ops. As a side effect the new code also fixes the case in which the rfcomm tty device is created with the flag RFCOMM_REUSE_DLC: the old code didn't call device_move() and ModemManager skipped the detection probe. Now device_move() is always called inside rfcomm_dev_activate(). Signed-off-by: Gianluca Anzolin <gianluca@sottospazio.it> Reported-by: Andrey Vihrov <andrey.vihrov@gmail.com> Reported-by: Beson Chow <blc+bluez@mail.vanade.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-01-06Bluetooth: Move rfcomm_get_device() before rfcomm_dev_activate()Gianluca Anzolin
This is a preparatory patch which moves the rfcomm_get_device() definition before rfcomm_dev_activate() where it will be used. Signed-off-by: Gianluca Anzolin <gianluca@sottospazio.it> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-01-06Bluetooth: Release RFCOMM port when the last user closes the TTYGianluca Anzolin
This patch fixes a userspace regression introduced by the commit 29cd718b. If the rfcomm device was created with the flag RFCOMM_RELEASE_ONHUP the user space expects that the tty_port is released as soon as the last process closes the tty. The current code attempts to release the port in the function rfcomm_dev_state_change(). However it won't get a reference to the relevant tty to send a HUP: at that point the tty is already destroyed and therefore NULL. This patch fixes the regression by taking over the tty refcount in the tty install method(). This way the tty_port is automatically released as soon as the tty is destroyed. As a consequence the check for RFCOMM_RELEASE_ONHUP flag in the hangup() method is now redundant. Instead we have to be careful with the reference counting in the rfcomm_release_dev() function. Signed-off-by: Gianluca Anzolin <gianluca@sottospazio.it> Reported-by: Alexander Holler <holler@ahsoftware.de> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-01-06Merge branch 'master' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
2014-01-06Bluetooth: Default to no security with L2CAP RAW socketsJohan Hedberg
L2CAP RAW sockets can be used for things which do not involve establishing actual connection oriented L2CAP channels. One example of such usage is the l2ping tool. The default security level for L2CAP sockets is LOW, which implies that for SSP based connection authentication is still requested (although with no MITM requirement), which is not what we want (or need) for things like l2ping. Therefore, default to one lower level, i.e. BT_SECURITY_SDP, for L2CAP RAW sockets in order not to trigger unwanted authentication requests. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-01-06Bluetooth: Fix NULL pointer dereference when disconnectingJohan Hedberg
When disconnecting it is possible that the l2cap_conn pointer is already NULL when bt_6lowpan_del_conn() is entered. Looking at l2cap_conn_del also verifies this as there's a NULL check there too. This patch adds the missing NULL check without which the following bug may occur: BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<c131e9c7>] bt_6lowpan_del_conn+0x19/0x12a *pde = 00000000 Oops: 0000 [#1] SMP CPU: 1 PID: 52 Comm: kworker/u5:1 Not tainted 3.12.0+ #196 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 Workqueue: hci0 hci_rx_work task: f6259b00 ti: f48c0000 task.ti: f48c0000 EIP: 0060:[<c131e9c7>] EFLAGS: 00010282 CPU: 1 EIP is at bt_6lowpan_del_conn+0x19/0x12a EAX: 00000000 EBX: ef094e10 ECX: 00000000 EDX: 00000016 ESI: 00000000 EDI: f48c1e60 EBP: f48c1e50 ESP: f48c1e34 DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 CR0: 8005003b CR2: 00000000 CR3: 30c65000 CR4: 00000690 Stack: f4d38000 00000000 f4d38000 00000002 ef094e10 00000016 f48c1e60 f48c1e70 c1316bed f48c1e84 c1316bed 00000000 00000001 ef094e10 f48c1e84 f48c1ed0 c1303cc6 c1303c7b f31f331a c1303cc6 f6e7d1c0 f3f8ea16 f3f8f380 f4d38008 Call Trace: [<c1316bed>] l2cap_disconn_cfm+0x3f/0x5b [<c1316bed>] ? l2cap_disconn_cfm+0x3f/0x5b [<c1303cc6>] hci_event_packet+0x645/0x2117 [<c1303c7b>] ? hci_event_packet+0x5fa/0x2117 [<c1303cc6>] ? hci_event_packet+0x645/0x2117 [<c12681bd>] ? __kfree_skb+0x65/0x68 [<c12681eb>] ? kfree_skb+0x2b/0x2e [<c130d3fb>] ? hci_send_to_sock+0x18d/0x199 [<c12fa327>] hci_rx_work+0xf9/0x295 [<c12fa327>] ? hci_rx_work+0xf9/0x295 [<c1036d25>] process_one_work+0x128/0x1df [<c1346a39>] ? _raw_spin_unlock_irq+0x8/0x12 [<c1036d25>] ? process_one_work+0x128/0x1df [<c103713a>] worker_thread+0x127/0x1c4 [<c1037013>] ? rescuer_thread+0x216/0x216 [<c103aec6>] kthread+0x88/0x8d [<c1040000>] ? task_rq_lock+0x37/0x6e [<c13474b7>] ret_from_kernel_thread+0x1b/0x28 [<c103ae3e>] ? __kthread_parkme+0x50/0x50 Code: 05 b8 f4 ff ff ff 8d 65 f4 5b 5e 5f 5d 8d 67 f8 5f c3 57 8d 7c 24 08 83 e4 f8 ff 77 fc 55 89 e5 57 56f EIP: [<c131e9c7>] bt_6lowpan_del_conn+0x19/0x12a SS:ESP 0068:f48c1e34 CR2: 0000000000000000 Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-01-04Bluetooth: Add quirk for disabling Delete Stored Link Key commandMarcel Holtmann
Some controller pretend they support the Delete Stored Link Key command, but in reality they really don't support it. < HCI Command: Delete Stored Link Key (0x03|0x0012) plen 7 bdaddr 00:00:00:00:00:00 all 1 > HCI Event: Command Complete (0x0e) plen 4 Delete Stored Link Key (0x03|0x0012) ncmd 1 status 0x11 deleted 0 Error: Unsupported Feature or Parameter Value Not correctly supporting this command causes the controller setup to fail and will make a device not work. However sending the command for controller that handle stored link keys is important. This quirk allows a driver to disable the command if it knows that this command handling is broken. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2013-12-18Merge branch 'for-upstream' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth
2013-12-17Bluetooth: Fix HCI User Channel permission check in hci_sock_sendmsgMarcel Holtmann
The HCI User Channel is an admin operation which enforces CAP_NET_ADMIN when binding the socket. Problem now is that it then requires also CAP_NET_RAW when calling into hci_sock_sendmsg. This is not intended and just an oversight since general HCI sockets (which do not require special permission to bind) and HCI User Channel share the same code path here. Remove the extra CAP_NET_RAW check for HCI User Channel write operation since the permission check has already been enforced when binding the socket. This also makes it possible to open HCI User Channel from a privileged process and then hand the file descriptor to an unprivilged process. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Tested-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2013-12-14Bluetooth: fix return value checkWei Yongjun
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>
2013-12-14Bluetooth: remove unused including <linux/version.h>Wei Yongjun
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>
2013-12-13Merge branch 'master' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
2013-12-126lowpan: fix/move/cleanup debug functionsAlexander Aring
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>
2013-12-11Bluetooth: Fix test for lookup_dev return valueJohan Hedberg
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>
2013-12-11Bluetooth: Add missing 6lowpan.h includeJohan Hedberg
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>
2013-12-11Bluetooth: Manually enable or disable 6LoWPAN between devicesJukka Rissanen
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>
2013-12-11Bluetooth: Enable 6LoWPAN support for BT LE devicesJukka Rissanen
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>
2013-12-10Bluetooth: Fix handling of L2CAP Command Reject over LEJohan Hedberg
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>
2013-12-09Bluetooth: Use macros for connectionless slave broadcast featuresMarcel Holtmann
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>
2013-12-07Bluetooth: Increase minor version of core moduleMarcel Holtmann
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>
2013-12-06net/*: Fix FSF address in file headersJeff Kirsher
Several files refer to an old address for the Free Software Foundation in the file header comment. Resolve by replacing the address with the URL <http://www.gnu.org/licenses/> so that we do not have to keep updating the header comments anytime the address changes. CC: John Fastabend <john.r.fastabend@intel.com> CC: Alex Duyck <alexander.h.duyck@intel.com> CC: Marcel Holtmann <marcel@holtmann.org> CC: Gustavo Padovan <gustavo@padovan.org> CC: Johan Hedberg <johan.hedberg@gmail.com> CC: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-05Bluetooth: Fix valid LE PSM checkJohan Hedberg
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>
2013-12-05Bluetooth: Use min_t for calculating chan->mpsJohan Hedberg
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>
2013-12-05Bluetooth: Simplify l2cap_chan initialization for LE CoCJohan Hedberg
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>
2013-12-05Bluetooth: Add debugfs controls for LE CoC MPS and CreditsJohan Hedberg
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>
2013-12-05Bluetooth: Fix validating LE PSM valuesJohan Hedberg
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>
2013-12-05Bluetooth: Fix CID ranges for LE CoC CID allocationsJohan Hedberg
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>
2013-12-05Bluetooth: Fix clearing of chan->omtu for LE CoC channelsJohan Hedberg
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>
2013-12-05Bluetooth: Limit LE MPS to the MTU valueJohan Hedberg
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>
2013-12-05Bluetooth: Fix suspending the L2CAP socket if we start with 0 creditsJohan Hedberg
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>
2013-12-05Bluetooth: Fix LE L2CAP Connect Request handling together with SMPJohan Hedberg
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>
2013-12-05Bluetooth: Implement LE L2CAP reassemblyJohan Hedberg
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>
2013-12-05Bluetooth: Add LE L2CAP segmentation support for outgoing dataJohan Hedberg
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>
2013-12-05Bluetooth: Introduce L2CAP channel callback for suspendingJohan Hedberg
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>
2013-12-05Bluetooth: Reject LE CoC commands when the feature is not enabledJohan Hedberg
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>
2013-12-05Bluetooth: Add LE flow control disciplineJohan Hedberg
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>
2013-12-05Bluetooth: Implement returning of LE L2CAP creditsJohan Hedberg
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>
2013-12-05Bluetooth: Add new BT_SNDMTU and BT_RCVMTU socket optionsJohan Hedberg
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>
2013-12-05Bluetooth: Limit L2CAP_OPTIONS socket option usage with LEJohan Hedberg
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>
2013-12-05Bluetooth: Track LE L2CAP credits in l2cap_chanJohan Hedberg
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>
2013-12-05Bluetooth: Add LE L2CAP flow control modeJohan Hedberg
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>
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