From 9ecb3e24258f1ff4b9937602962ae12e3b57f98d Mon Sep 17 00:00:00 2001 From: Marcel Holtmann Date: Thu, 10 Oct 2013 03:08:11 -0700 Subject: [PATCH] Bluetooth: Restrict high speed support to SSP enabled controllers The support for Bluetooth High Speed can only be enabled on controllers where also Secure Simple Pairing has been enabled. Trying to enable high speed when SSP is disabled will result into an error. Disabling SSP will at the same time disable high speed as well. It is required to enforce this dependency on SSP since high speed support is only defined for authenticated, unauthenticated and debug link keys. These link key types require SSP. Signed-off-by: Marcel Holtmann Signed-off-by: Johan Hedberg --- net/bluetooth/mgmt.c | 42 ++++++++++++++++++++++++++++++++---------- 1 file changed, 32 insertions(+), 10 deletions(-) diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index 2fb4d35..e7ffd39 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -1310,11 +1310,19 @@ static int set_ssp(struct sock *sk, struct hci_dev *hdev, void *data, u16 len) hci_dev_lock(hdev); if (!hdev_is_powered(hdev)) { - bool changed = false; + bool changed; - if (val != test_bit(HCI_SSP_ENABLED, &hdev->dev_flags)) { - change_bit(HCI_SSP_ENABLED, &hdev->dev_flags); - changed = true; + if (cp->val) { + changed = !test_and_set_bit(HCI_SSP_ENABLED, + &hdev->dev_flags); + } else { + changed = test_and_clear_bit(HCI_SSP_ENABLED, + &hdev->dev_flags); + if (!changed) + changed = test_and_clear_bit(HCI_HS_ENABLED, + &hdev->dev_flags); + else + clear_bit(HCI_HS_ENABLED, &hdev->dev_flags); } err = send_settings_rsp(sk, MGMT_OP_SET_SSP, hdev); @@ -1327,7 +1335,8 @@ static int set_ssp(struct sock *sk, struct hci_dev *hdev, void *data, u16 len) goto failed; } - if (mgmt_pending_find(MGMT_OP_SET_SSP, hdev)) { + if (mgmt_pending_find(MGMT_OP_SET_SSP, hdev) || + mgmt_pending_find(MGMT_OP_SET_HS, hdev)) { err = cmd_status(sk, hdev->id, MGMT_OP_SET_SSP, MGMT_STATUS_BUSY); goto failed; @@ -1368,6 +1377,14 @@ static int set_hs(struct sock *sk, struct hci_dev *hdev, void *data, u16 len) if (status) return cmd_status(sk, hdev->id, MGMT_OP_SET_HS, status); + if (!lmp_ssp_capable(hdev)) + return cmd_status(sk, hdev->id, MGMT_OP_SET_HS, + MGMT_STATUS_NOT_SUPPORTED); + + if (!test_bit(HCI_SSP_ENABLED, &hdev->dev_flags)) + return cmd_status(sk, hdev->id, MGMT_OP_SET_HS, + MGMT_STATUS_REJECTED); + if (cp->val != 0x00 && cp->val != 0x01) return cmd_status(sk, hdev->id, MGMT_OP_SET_HS, MGMT_STATUS_INVALID_PARAMS); @@ -4403,8 +4420,10 @@ int mgmt_ssp_enable_complete(struct hci_dev *hdev, u8 enable, u8 status) u8 mgmt_err = mgmt_status(status); if (enable && test_and_clear_bit(HCI_SSP_ENABLED, - &hdev->dev_flags)) + &hdev->dev_flags)) { + clear_bit(HCI_HS_ENABLED, &hdev->dev_flags); err = new_settings(hdev, NULL); + } mgmt_pending_foreach(MGMT_OP_SET_SSP, hdev, cmd_status_rsp, &mgmt_err); @@ -4413,11 +4432,14 @@ int mgmt_ssp_enable_complete(struct hci_dev *hdev, u8 enable, u8 status) } if (enable) { - if (!test_and_set_bit(HCI_SSP_ENABLED, &hdev->dev_flags)) - changed = true; + changed = !test_and_set_bit(HCI_SSP_ENABLED, &hdev->dev_flags); } else { - if (test_and_clear_bit(HCI_SSP_ENABLED, &hdev->dev_flags)) - changed = true; + changed = test_and_clear_bit(HCI_SSP_ENABLED, &hdev->dev_flags); + if (!changed) + changed = test_and_clear_bit(HCI_HS_ENABLED, + &hdev->dev_flags); + else + clear_bit(HCI_HS_ENABLED, &hdev->dev_flags); } mgmt_pending_foreach(MGMT_OP_SET_SSP, hdev, settings_rsp, &match); -- 2.7.4