From 9713c17b086c1ebfe34ea4d34147a778276e2dab Mon Sep 17 00:00:00 2001 From: Marcel Holtmann Date: Sun, 6 Jul 2014 12:11:15 +0200 Subject: Bluetooth: Add support for changing the public device address This adds support for changing the public device address. This feature is required by controllers that do not provide a public address and have HCI_QUIRK_INVALID_BDADDR set. Even if a controller has a public device address, this is useful when an embedded system wants to use its own value. As long as the driver provides the set_bdaddr callback, this allows changing the device address before powering on the controller. Signed-off-by: Marcel Holtmann Signed-off-by: Johan Hedberg --- net/bluetooth/hci_core.c | 14 +++++++----- net/bluetooth/mgmt.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 64 insertions(+), 7 deletions(-) (limited to 'net/bluetooth') diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index bf7cf512df88..c96b96ca41ac 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -2302,12 +2302,14 @@ static int hci_dev_do_open(struct hci_dev *hdev) ret = __hci_unconf_init(hdev); } - /* If public address change is configured, ensure that the - * address gets programmed. If the driver does not support - * changing the public address, fail the power on procedure. - */ - if (!ret && bacmp(&hdev->public_addr, BDADDR_ANY)) { - if (hdev->set_bdaddr) + if (test_bit(HCI_CONFIG, &hdev->dev_flags)) { + /* If public address change is configured, ensure that + * the address gets programmed. If the driver does not + * support changing the public address, fail the power + * on procedure. + */ + if (bacmp(&hdev->public_addr, BDADDR_ANY) && + hdev->set_bdaddr) ret = hdev->set_bdaddr(hdev, &hdev->public_addr); else ret = -EADDRNOTAVAIL; diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index d66463a52280..8275316ae099 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -92,6 +92,7 @@ static const u16 mgmt_commands[] = { MGMT_OP_READ_UNCONF_INDEX_LIST, MGMT_OP_READ_CONFIG_INFO, MGMT_OP_SET_EXTERNAL_CONFIG, + MGMT_OP_SET_PUBLIC_ADDRESS, }; static const u16 mgmt_events[] = { @@ -5459,6 +5460,58 @@ unlock: return err; } +static int set_public_address(struct sock *sk, struct hci_dev *hdev, + void *data, u16 len) +{ + struct mgmt_cp_set_public_address *cp = data; + bool changed; + int err; + + BT_DBG("%s", hdev->name); + + if (hdev_is_powered(hdev)) + return cmd_status(sk, hdev->id, MGMT_OP_SET_PUBLIC_ADDRESS, + MGMT_STATUS_REJECTED); + + if (!bacmp(&cp->bdaddr, BDADDR_ANY)) + return cmd_status(sk, hdev->id, MGMT_OP_SET_PUBLIC_ADDRESS, + MGMT_STATUS_INVALID_PARAMS); + + if (!hdev->set_bdaddr) + return cmd_status(sk, hdev->id, MGMT_OP_SET_PUBLIC_ADDRESS, + MGMT_STATUS_NOT_SUPPORTED); + + hci_dev_lock(hdev); + + changed = !!bacmp(&hdev->public_addr, &cp->bdaddr); + bacpy(&hdev->public_addr, &cp->bdaddr); + + err = send_options_rsp(sk, MGMT_OP_SET_PUBLIC_ADDRESS, hdev); + if (err < 0) + goto unlock; + + if (!changed) + goto unlock; + + if (test_bit(HCI_UNCONFIGURED, &hdev->dev_flags)) + err = new_options(hdev, sk); + + if (is_configured(hdev)) { + mgmt_index_removed(hdev); + + clear_bit(HCI_UNCONFIGURED, &hdev->dev_flags); + + set_bit(HCI_CONFIG, &hdev->dev_flags); + set_bit(HCI_AUTO_OFF, &hdev->dev_flags); + + queue_work(hdev->req_workqueue, &hdev->power_on); + } + +unlock: + hci_dev_unlock(hdev); + return err; +} + static const struct mgmt_handler { int (*func) (struct sock *sk, struct hci_dev *hdev, void *data, u16 data_len); @@ -5522,6 +5575,7 @@ static const struct mgmt_handler { { read_unconf_index_list, false, MGMT_READ_UNCONF_INDEX_LIST_SIZE }, { read_config_info, false, MGMT_READ_CONFIG_INFO_SIZE }, { set_external_config, false, MGMT_SET_EXTERNAL_CONFIG_SIZE }, + { set_public_address, false, MGMT_SET_PUBLIC_ADDRESS_SIZE }, }; int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen) @@ -5576,7 +5630,8 @@ int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen) if (test_bit(HCI_UNCONFIGURED, &hdev->dev_flags) && opcode != MGMT_OP_READ_CONFIG_INFO && - opcode != MGMT_OP_SET_EXTERNAL_CONFIG) { + opcode != MGMT_OP_SET_EXTERNAL_CONFIG && + opcode != MGMT_OP_SET_PUBLIC_ADDRESS) { err = cmd_status(sk, index, opcode, MGMT_STATUS_INVALID_INDEX); goto done; -- cgit v1.2.3