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2015-03-26Bluetooth: Unify advertising data code pathsArman Uguray1-91/+64
This patch simplifies the code paths for assembling the advertising data used by advertising instances 0 and 1. Signed-off-by: Arman Uguray <armansito@chromium.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-26Bluetooth: Update supported_flags for AD featuresArman Uguray1-3/+29
This patch updates the "supported_flags" parameter returned from the "Read Advertising Features" command. Add Advertising will now return an error if an unsupported flag is provided. Signed-off-by: Arman Uguray <armansito@chromium.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-26Bluetooth: Support the "tx-power" adv flagArman Uguray1-0/+19
This patch adds support for the "tx-power" flag of the Add Advertising command. Signed-off-by: Arman Uguray <armansito@chromium.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-26Bluetooth: Support the "managed-flags" adv flagArman Uguray1-2/+9
This patch adds support for the "managed-flags" flag of the Add Advertising command. Signed-off-by: Arman Uguray <armansito@chromium.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-26Bluetooth: Support the "limited-discoverable" adv flagArman Uguray1-1/+8
This patch adds support for the "limited-discoverable" flag of the Add Advertising command. Signed-off-by: Arman Uguray <armansito@chromium.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-26Bluetooth: Support the "discoverable" adv flagArman Uguray1-8/+30
This patch adds support for the "discoverable" flag of the Add Advertising command. Signed-off-by: Arman Uguray <armansito@chromium.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-26Bluetooth: Support the "connectable mode" adv flagArman Uguray1-31/+56
This patch adds support for the "connectable mode" flag of the Add Advertising command. Signed-off-by: Arman Uguray <armansito@chromium.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-25Bluetooth: Fix minor typo in comment for static address settingMarcel Holtmann1-1/+1
Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-24Bluetooth: Filter list of supported commands/events for untrusted usersMarcel Holtmann1-7/+46
When the user of the management interface is not trusted, then it only has access to a limited set of commands and events. When providing the list of supported commands and events take the trusted vs untrusted status of the user into account and return different lists. This way the untrusted user knows exactly which commands it can execute and which events it can receive. So no guesswork needed. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-24Bluetooth: Add support for adv instance timeoutArman Uguray1-20/+81
This patch implements support for the timeout parameter of the Add Advertising command. Signed-off-by: Arman Uguray <armansito@chromium.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-24Bluetooth: Add support for instance scan responseArman Uguray1-14/+52
This patch implements setting the Scan Response data provided as part of an advertising instance through the Add Advertising command. Signed-off-by: Arman Uguray <armansito@chromium.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-24Bluetooth: Implement the Remove Advertising commandArman Uguray1-0/+103
This patch implements the "Remove Advertising" mgmt command. Signed-off-by: Arman Uguray <armansito@chromium.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-24Bluetooth: Implement the Add Advertising commandArman Uguray1-10/+273
This patch adds the most basic implementation for the "Add Advertisement" command. All state updates between the various HCI settings (POWERED, ADVERTISING, ADVERTISING_INSTANCE, and LE_ENABLED) has been implemented. The command currently supports only setting the advertising data fields, with no flags and no scan response data. Signed-off-by: Arman Uguray <armansito@chromium.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-24Bluetooth: Add data structure for advertising instanceArman Uguray1-0/+1
This patch introduces a new data structure to represent advertising instances that were added using the "Add Advertising" mgmt command. Initially an hci_dev structure will support only one of these instances at a time, so the current instance is simply stored as a direct member of hci_dev. Signed-off-by: Arman Uguray <armansito@chromium.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-22Bluetooth: Fix memory leak in le_scan_disable_work_complete()Johan Hedberg1-8/+9
The hci_request in le_scan_disable_work_complete() was being initialized in a general context but only used in a specific branch in the function (when simultaneous discovery is not supported). This patch moves the usage to be limited to the branch where hci_req_run() is actually called. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-20Bluetooth: Expose quirks through debugfsJakub Pawlowski1-0/+60
This patch expose controller quirks through debugfs. It would be useful for BlueZ tests using vhci. Currently there is no way to test quirk dependent behaviour. It might be also useful for manual testing. Signed-off-by: Jakub Pawlowski <jpawlowski@google.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-20Bluetooth: Use HCI_MAX_AD_LENGTH constant instead hardcoded valueMarcel Holtmann1-2/+2
Using the HCI_MAX_AD_LENGTH for the max advertising data and max scan response data length makes more sense than hardcoding the value. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-20Bluetooth: Gracefully response to enabling LE on LE only devicesMarcel Holtmann1-2/+14
Currently the enabling of LE on LE only devices causes an error. This is a bit difference from other commands where trying to set the same existing settings causes a positive response. Fix this behavior for this single corner case. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-18Bluetooth: Fix potential NULL dereference in SMP channel setupMarcel Holtmann1-3/+5
When the allocation of the L2CAP channel for the BR/EDR security manager fails, then the smp variable might be NULL. In that case do not try to free the non-existing crypto contexts Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-17Bluetooth: Add workaround for broken OS X legacy SMP pairingJohan Hedberg1-8/+67
OS X version 10.10.2 (and possibly older versions) doesn't support LE Secure Connections but incorrectly copies all authentication request bits from a Security Request to its Pairing Request. The result is that an SC capable initiator (such as BlueZ) will think OS X intends to do SC when in fact it's incapable of it: < ACL Data TX: Handle 3585 flags 0x00 dlen 6 SMP: Security Request (0x0b) len 1 Authentication requirement: Bonding, No MITM, SC, No Keypresses (0x09) > ACL Data RX: Handle 3585 flags 0x02 dlen 11 SMP: Pairing Request (0x01) len 6 IO capability: KeyboardDisplay (0x04) OOB data: Authentication data not present (0x00) Authentication requirement: Bonding, No MITM, SC, No Keypresses (0x09) Max encryption key size: 16 Initiator key distribution: EncKey (0x01) Responder key distribution: EncKey IdKey Sign (0x07) < ACL Data TX: Handle 3585 flags 0x00 dlen 11 SMP: Pairing Response (0x02) len 6 IO capability: NoInputNoOutput (0x03) OOB data: Authentication data not present (0x00) Authentication requirement: Bonding, No MITM, SC, No Keypresses (0x09) Max encryption key size: 16 Initiator key distribution: EncKey (0x01) Responder key distribution: EncKey Sign (0x05) The pairing eventually fails when we get an unexpected Pairing Confirm PDU instead of a Public Key PDU: > ACL Data RX: Handle 3585 flags 0x02 dlen 21 SMP: Pairing Confirm (0x03) len 16 Confim value: bcc3bed31b8f313a78ec3cce32685faf It is only at this point that we can speculate that the remote doesn't really support SC. This patch creates a workaround for the just-works model, however the MITM case is unsolvable because the OS X user has already been requested to enter a PIN which we're now expected to randomly generate and show the user (i.e. a chicken-and-egg problem). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-17Bluetooth: Move generic mgmt command dispatcher to hci_sock.cJohan Hedberg2-112/+115
The mgmt.c file should be reserved purely for HCI_CHANNEL_CONTROL. The mgmt_control() function in it is already completely generic and has a single user in hci_sock.c. This patch moves the function there and renames it a bit more appropriately to hci_mgmt_cmd() (as it's a command dispatcher). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-17Bluetooth: Add hdev_init callback for HCI channelsJohan Hedberg1-2/+3
In order to make the mgmt command handling more generic we can't have a direct call to mgmt_init_hdev() from mgmt_control(). This patch adds a new callback to struct hci_mgmt_chan. And sets it to point to the mgmt_init_hdev() function for the HCI_CHANNEL_CONTROL instance. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-17Bluetooth: Add generic mgmt helper APIJohan Hedberg4-197/+265
There are several mgmt protocol features that will be needed by more than just the current HCI_CHANNEL_CONTROL. These include sending generic events as well as handling pending commands. This patch moves these functions out from mgmt.c to a new mgmt_util.c file. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-17Bluetooth: Add channel parameter to mgmt_pending_find() APIJohan Hedberg1-46/+62
To be able to have pending commands for different HCI channels we need to be able to distinguish for which channel a command was sent to. The channel information is already part of the socket data and can be fetched using the recently added hci_sock_get_channel() function. To not require all mgmt.c code to pass an extra channel parameter this patch also adds a helper pending_find() & pending_find_data() functions which act as a wrapper to the new mgmt_pending_find() & mgmt_pending_find_data() APIs. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-17Bluetooth: Add helper to get HCI channel of a socketJohan Hedberg1-0/+5
We'll need to have access to which HCI channel a socket is bound to, in order to manage pending mgmt commands in clean way. This patch adds a helper for the purpose. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-17Bluetooth: Add simultaneous dual mode scanJakub Pawlowski3-10/+70
When doing scan through mgmt api, some controllers can do both le and classic scan at same time. They can be distinguished by HCI_QUIRK_SIMULTANEOUS_DISCOVERY set. This patch enables them to use this feature when doing dual mode scan. Instead of doing le, then classic scan, both scans are run at once. Signed-off-by: Jakub Pawlowski <jpawlowski@google.com> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-17Bluetooth: Refactor BR/EDR inquiry and LE scan triggering.Jakub Pawlowski1-65/+85
This patch refactor BR/EDR inquiry and LE scan triggering logic into separate methods. Signed-off-by: Jakub Pawlowski <jpawlowski@google.com> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-17Bluetooth: Add support for Local OOB Extended Data Update eventsMarcel Holtmann1-0/+16
When a different user requests a new set of local out-of-band data, then inform all previous users that the data has been updated. To limit the scope of users, the updates are limited to previous users. If a user has never requested out-of-band data, it will also not see the update. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-17Bluetooth: Fix length for Read Local OOB Extended Data respone packetMarcel Holtmann1-1/+1
The length of the respone packet for Read Local OOB Extended Data command has a calculation error. In case LE Secure Connections support is not enabled, the actual response is shorter. Keep this in mind and update the value accordingly. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16Bluetooth: Do not include LE SC out-of-band data if not enabledMarcel Holtmann1-8/+13
In case LE Secure Connections is not enabled, then the command for returning local out-of-band data should not include the confirmation and random value for LE SC pairing. All other fields are still valid, but these two need to be left out. In that case it is also no needed to generate the public/private key pair for out-of-band pairing. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16Bluetooth: The P-256 randomizer is 16 octets long and not 19 octetsMarcel Holtmann1-1/+1
This seems to be a simple typo in the debugfs entry for the remote out-of-band data entries. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16Bluetooth: Rename smp->local_rr into smp->local_randMarcel Holtmann1-5/+5
The variable for the out-of-band random number was badly named and with that confusing. Just rename it to local_rand so it is clear what value it represents. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16Bluetooth: Add extra SMP_DBG statement for remote OOB dataMarcel Holtmann1-0/+2
Just for pure debugging purposes print the remote out-of-band data that has been received and is going to be used. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16Bluetooth: Use smp->remote_pk + 32 instead of &smp->remote_pk[32]Marcel Holtmann1-1/+1
Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16Bluetooth: Add clarifying comment when setting local OOB flagJohan Hedberg1-0/+8
It might be a bit counterintuitive to set a 'local' flag based on remote data. This patch adds a clarifying comment to the pairing req/rsp handlers when setting the LOCAL_OOB flag based on the PDU received from the remote side. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-16Bluetooth: Don't send public key if OOB data verification failsJohan Hedberg1-10/+10
When we receive the remote public key, if we have remote OOB data there's no point in sending our public key to the remote if the OOB data doesn't match. This patch moves the test for this higher up in the smp_cmd_public_key() function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-16Bluetooth: Fix verifying confirm value when lacking remote OOB dataJohan Hedberg1-1/+3
If we haven't received remote OOB data we cannot perform any special checks on the confirm value. This patch updates the check after having received the public key to only perform the verification if we have remote OOB data present. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-16Bluetooth: Set local OOB data flag if remote has our OOB dataJohan Hedberg1-0/+6
If the SMP Pairing Request or Response PDU received from the remote device indicates that it has received our OOB data we should set the SMP_FLAG_LOCAL_OOB flag. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-16Bluetooth: Track local vs remote OOB data availabilityJohan Hedberg1-4/+6
There are several decisions in the SMP logic that depend not only on whether we're doing SMP or not, but also whether local and/or remote OOB data is present. This patch splits the existing SMP_FLAG_OOB into two new flags to track local and remote OOB data respectively. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-16Bluetooth: Fix local OOB data handling for SMPJohan Hedberg1-2/+5
We need to store the local ra/rb value in order to verify the Check value received from the remote. This patch adds a new 'lr' for the local ra/rb value and makes sure it gets used when verifying the DHKey Check PDU received from the remote. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-03-16Bluetooth: Use smp->local_pk + 32 instead of &smp->local_pk[32]Marcel Holtmann1-1/+1
Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16Bluetooth: Use OOB key pair for LE SC pairing with OOB methodMarcel Holtmann1-0/+20
The OOB public and secret key pair is different from the non-OOB pairing procedure. SO when OOB method is in use, then use this key pair instead of generating a new one. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16Bluetooth: Return LE SC confirm and random values for out-of-band dataMarcel Holtmann1-2/+18
Then the local out-of-band data for LE SC pairing is requested via Read Local OOB Extended Data command, then fill in the values generated by the smp_generate_oob function. Every call of this command will overwrite previously generated values. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16Bluetooth: Add function for generating LE SC out-of-band dataMarcel Holtmann2-0/+54
This patch adds a smp_generate_oob function that allows to create local out-of-band data that can be used for pairing and also provides the confirmation and random value. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16Bluetooth: Add support for AES-CMAC hash for security manager deviceMarcel Holtmann1-0/+14
The security manager device will require the use of AES-CMAC hash for out-of-band data generation. This patch makes sure it is correctly set up and available. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16Bluetooth: Create SMP device structure for local crypto contextMarcel Holtmann1-16/+31
Every Bluetooth Low Energy controller requires a local crypto context to handle the resolvable private addresses. At the moment this is just a single crypto context, but for out-of-band data generation it will require an additional. To facility this, create a struct smp_dev that will hold all the extra information. This patch is just the refactoring in preparation for future changes. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16Bluetooth: Use kzfree instead of kfree in security managerMarcel Holtmann1-8/+8
Within the security manager, it makes sense to use kzfree instead of kfree for all data structures. This ensures that no key material leaks by accident. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16Bluetooth: Remove unneeded HCI_CONN_REMOTE_OOB connection flagMarcel Holtmann1-2/+0
The HCI_CONN_REMOTE_OOB connection flag is used to indicate if the pairing initiator has provided out-of-band data. However since that value is no longer used in any decision making, just remove it. It is actually unclear what purpose the OOB data present field from the HCI IO Capability Response event serves in the first place. If either side provided out-of-band data, then that data will be used for pairing. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-16Bluetooth: Fix BR/EDR out-of-band pairing with only initiator dataMarcel Holtmann1-29/+25
When only the pairing initiator is providing out-of-band data, then the receiver side was ignoring the data. For some reason the code was checking if the initiator has received out-of-band data and only then also provide the required inidication that the acceptor actually has the needed data available. For BR/EDR out-of-band pairing it is enough if one side has received out-of-band data. There are no extra checks needed here to make this work smoothly. The only thing that is needed is to tell the controller if data is present (and if it is P-192 or P-256 or both) and then let the controller actually figure out the rest. This means the check for outgoing connection or if the initiator has indicated data are completely pointless and are in fact actually causing harm. The check in question is this one: if (conn->out || test_bit(HCI_CONN_REMOTE_OOB, &conn->flags)) { After just taking the conditional check out and always executing the code for determining the type of out-of-band data, the pairing works flawlessly and prodcudes authenticated link keys. The patch itself looks more complicated due to the reformatting of the indentation, but it essentially just a two-line change. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-03-15Bluetooth: Add simple version of Read Local OOB Extended Data commandMarcel Holtmann1-1/+110
This adds support for the simplest possible version of Read Local OOB Extended Data management command. It includes all mandatory fields, but none of the actual pairing related ones. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
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