The code that handles LE connection is already quite separated from
the rest of the connection procedure, so we can easily put it into
its own.
Signed-off-by: NVinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: NGustavo Padovan <gustavo.padovan@collabora.co.uk>

These names were causing much confusion, so we rename these functions
that send HCI commands to be more similar in naming to the actual HCI
commands that will be sent.
Signed-off-by: NVinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: NGustavo Padovan <gustavo.padovan@collabora.co.uk>

Some connection related functions are only used inside hci_conn.c
so no need to have them exported.
Signed-off-by: NVinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: NGustavo Padovan <gustavo.padovan@collabora.co.uk>

If AMP controller is first in the list then Bluetooth traffic might
be routed through it (if source is not specified). The patch
prevents this case and also checks that source is BR/EDR.
Signed-off-by: NAndrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: NGustavo Padovan <gustavo.padovan@collabora.co.uk>

Improve debugging of hci_conn objects by: adding print to hci_conn
refcounting, adding object spcifier when missing, change conn to hcon
since conn is heavily used for l2cap_conn objects and this is misleading.
Signed-off-by: NAndrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: NGustavo Padovan <gustavo.padovan@collabora.co.uk>

Only one outgoing LE connection attempt should be possible.
hci_connect() will now return -EBUSY in case there's another pending
outgoing connection.
Signed-off-by: NAndrzej Kaczmarek <andrzej.kaczmarek@tieto.com>
Signed-off-by: NGustavo Padovan <gustavo.padovan@collabora.co.uk>

Define AMP Manager and some basic functions.
Signed-off-by: NAndrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: NGustavo Padovan <gustavo.padovan@collabora.co.uk>

Signed-off-by: NAndrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

After l2cap, sco and bluetooth modules merge some symbols doesn't need to
be exported anymore.
Signed-off-by: NGustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

Most of the include were unnecessary or already included by some other
header.
Replace module.h by export.h where possible.
Signed-off-by: NGustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This is some leftover from the last patches that fixed style. It is mostly
line over 80 characters fixes reported by checkpatch.pl.
checkpatch.pl is clean for these files now.
Signed-off-by: NGustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

Let the compiler chooses what is best.
Signed-off-by: NGustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

Signed-off-by: NAndrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

Follow net subsystem rules.
Signed-off-by: NGustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

No one is using hci_le_ltk_neg_reply() in bluetooth subsystem.
Signed-off-by: NSyam Sidhardhan <s.syam@samsung.com>
Signed-off-by: NGustavo Padovan <gustavo@padovan.org>

In this API, we were using sizeof operator for an array
given as function argument, which is invalid.
However this API is not used anywhere.
Signed-off-by: NSyam Sidhardhan <s.syam@samsung.com>
Signed-off-by: NGustavo Padovan <gustavo@padovan.org>

This patch adds the dst_type parameter to hci_connect function.
Instead of searching the address type in advertising cache, we
use the dst_type parameter to establish LE connections.

The dst_type is ignored for BR/EDR connection establishment.
Signed-off-by: NAndre Guedes <andre.guedes@openbossa.org>
Acked-by: NJohan Hedberg <johan.hedberg@intel.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch removes unneeded variable assignments in hci_connect.
'sec_level' is already assigned to BT_SECURITY_LOW in hci_le_connect
and 'pending_sec_level' and 'auth_type' are assigned right after
if statement.
Signed-off-by: NAndre Guedes <andre.guedes@openbossa.org>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

As most LE devices leave advertising mode when they enter the connected
state, we may want to "pass" that connection to other users.

The first user will be the pairing procedure, the connection is
established without an associated socket, after the pairing is
complete, userspace may want to discover via GATT what services the
newly bonded device has.

If userspace establishes the connection while the timeout still
hasn't expired, the connection will be re-used.
Signed-off-by: NVinicius Costa Gomes <vinicius.gomes@openbossa.org>
Tested-by: NJoão Paulo Rechi Vita <jprvita@openbossa.org>
Signed-off-by: NGustavo Padovan <gustavo@padovan.org>

Remove all #inclusions of asm/system.h preparatory to splitting and killing
it.  Performed with the following command:

perl -p -i -e 's!^#\s*include\s*<asm/system[.]h>.*\n!!' `grep -Irl '^#\s*include\s*<asm/system[.]h>' *`
Signed-off-by: NDavid Howells <dhowells@redhat.com>

WARNING: min() should probably be min_t(__u16, scb->expect, count)
+		len = min(scb->expect, (__u16)count);

WARNING: Statements terminations use 1 semicolon
+	INIT_LIST_HEAD(&conn->chan_list);;
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>

The HCI notifier handling was never used outside of Bluetooth core layer
and thus remove it and replace it with direct function calls. Also move
the stack internal event generation into the HCI socket layer.
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>

The hci_connect function should either return a valid hci_conn pointer
or a ERR_PTR() but never NULL. This patch fixes the two places where
hci_conn_add failures would have caused a NULL return. The only reason
for failure with hci_conn_add is memory allocation so ENOMEM seems to be
a good choice here.
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>

Several hex numbers were printed without object name which
complicates debugging.
Signed-off-by: NAndrei Emeltchenko <andrei.emeltchenko@intel.com>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>

Use state_to_string function in debug statements.
Signed-off-by: NAndrei Emeltchenko <andrei.emeltchenko@intel.com>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>

Commit 33060542 fixed l2cap conn establishment for non-ssp remote
devices by not setting HCI_CONN_ENCRYPT_PEND every time conn security
is tested (which was always returning failure on any subsequent
security checks).

However, this broke l2cap conn establishment for ssp remote devices
when an ACL link was already established at SDP-level security. This
fix ensures that encryption must be pending whenever authentication
is also pending.
Signed-off-by: NPeter Hurley <peter@hurleysoftware.com>
Tested-by: NDaniel Wagner <daniel.wagner@bmw-carit.de>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>

Fixes possible bug when deleting element from the list in
function hci_chan_list_flush. list_for_each_entry_rcu is used
and after deleting element from the list we also free pointer
and then list_entry_rcu is taken from freed pointer.
Signed-off-by: NAndrei Emeltchenko <andrei.emeltchenko@intel.com>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>

Use list_for_each_entry_safe which is safe version against removal
of list entry. Otherwise we remove hci_conn element and reference
next element which result in accessing LIST_POISON.

[   95.571834] Bluetooth: unknown link type 127
[   95.578349] BUG: unable to handle kernel paging request at 20002000
[   95.580236] IP: [<20002000>] 0x20001fff
[   95.580763] *pde = 00000000
[   95.581196] Oops: 0000 [#1] SMP
...
[   95.582298] Pid: 3355, comm: hciconfig Tainted: G   O 3.2.0-VirttualBox
[   95.582298] EIP: 0060:[<20002000>] EFLAGS: 00210206 CPU: 0
[   95.582298] EIP is at 0x20002000
...
[   95.582298] Call Trace:
[   95.582298]  [<f8231ab6>] ? hci_conn_hash_flush+0x76/0xf0 [bluetooth]
[   95.582298]  [<f822bcb1>] hci_dev_do_close+0xc1/0x2e0 [bluetooth]
[   95.582298]  [<f822d679>] ? hci_dev_get+0x69/0xb0 [bluetooth]
[   95.582298]  [<f822e1da>] hci_dev_close+0x2a/0x50 [bluetooth]
[   95.582298]  [<f824102f>] hci_sock_ioctl+0x1af/0x3f0 [bluetooth]
[   95.582298]  [<c11153ea>] ? handle_pte_fault+0x8a/0x8f0
[   95.582298]  [<c146becf>] sock_ioctl+0x5f/0x260
[   95.582298]  [<c146be70>] ? sock_fasync+0x90/0x90
[   95.582298]  [<c1152b33>] do_vfs_ioctl+0x83/0x5b0
[   95.582298]  [<c1563f87>] ? do_page_fault+0x297/0x500
[   95.582298]  [<c1563cf0>] ? spurious_fault+0xd0/0xd0
[   95.582298]  [<c107165b>] ? up_read+0x1b/0x30
[   95.582298]  [<c1563f87>] ? do_page_fault+0x297/0x500
[   95.582298]  [<c100aa9f>] ? init_fpu+0xef/0x160
[   95.582298]  [<c15617c0>] ? do_debug+0x180/0x180
[   95.582298]  [<c100a958>] ? fpu_finit+0x28/0x80
[   95.582298]  [<c11530e7>] sys_ioctl+0x87/0x90
[   95.582298]  [<c156795f>] sysenter_do_call+0x12/0x38
...
Signed-off-by: NAndrei Emeltchenko <andrei.emeltchenko@intel.com>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>

Commit 33060542 fixed l2cap conn establishment for non-ssp remote
devices by not setting HCI_CONN_ENCRYPT_PEND every time conn security
is tested (which was always returning failure on any subsequent
security checks).

However, this broke l2cap conn establishment for ssp remote devices
when an ACL link was already established at SDP-level security. This
fix ensures that encryption must be pending whenever authentication
is also pending.
Signed-off-by: NPeter Hurley <peter@hurleysoftware.com>
Tested-by: NDaniel Wagner <daniel.wagner@bmw-carit.de>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>

We don't need locking hdev in hci_conn_timeout() since it doesn't
access any hdev's shared resources, it basically queues HCI commands.
Signed-off-by: NAndre Guedes <andre.guedes@openbossa.org>
Signed-off-by: NVinicius Costa Gomes <vinicius.gomes@openbossa.org>
Reviewed-by: NUlisses Furquim <ulisses@profusion.mobi>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>

This function is called in process context only, so it should use
GFP_KERNEL to allocate memory.
Signed-off-by: NAndre Guedes <andre.guedes@openbossa.org>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>

This function is called in process context only, so it should use
GFP_KERNEL to allocate memory.
Signed-off-by: NAndre Guedes <andre.guedes@openbossa.org>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>

It's a very common test to see if both the local and the remote device
have SSP enabled. By creating a simple function to test this we can
shorten many if-statements in the code.
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>

The ssp_mode is essentially just a boolean so it's more appropriate to
have it simply as a flag in hdev->dev_flags.
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>

Now that the flags member of struct hci_conn is supposed to accommodate
any boolean type values we can easily merge all boolean members into it.
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>

The hdev->out variable is essentially a boolean so the type 'bool' makes
more sense than u8.
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>

These flags can and will be used for more general purpose values than
just pending state transitions so the more common name "flags" makes
more sense than "pend".
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>

They don't need to disable interrupts anymore, we only run in process
context now.
Acked-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NGustavo F. Padovan <padovan@profusion.mobi>

This reverts commit 4dff523a.

It was reported that this patch cause issues when trying to connect to
legacy devices so reverting it.
Reported-by: NDavid Fries <david@fries.net>
Signed-off-by: NGustavo F. Padovan <padovan@profusion.mobi>

It's pointless, we aren't protecting anything since btusb_notify()
schedules a work to run, then all it operation happens without protection.
If protection is really needed here, we will fix it further.
Acked-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NGustavo F. Padovan <padovan@profusion.mobi>