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Bluetooth: Add automated SSP user confirmation responses

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This patch adds automated negative and positive (auto-accept) responses
for Secure Simple Pairing user confirmation requests. The responses are
only sent if the HCI_MGMT flag is set in order not to confuse older user
space versions (without management interface support).

Signed-off-by: Johan Hedberg <johan.hedberg@nokia.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
This commit is contained in:
Johan Hedberg 2011-04-28 11:28:53 -07:00 committed by Gustavo F. Padovan
parent a770bb5aea
commit 7a828908a0
1 changed files with 35 additions and 2 deletions
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37
net/bluetooth/hci_event.c
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@ -2483,14 +2483,47 @@ static inline void hci_user_confirm_request_evt(struct hci_dev *hdev,
struct sk_buff *skb) struct sk_buff *skb)
{ {
struct hci_ev_user_confirm_req *ev = (void *) skb->data; struct hci_ev_user_confirm_req *ev = (void *) skb->data;
int loc_mitm, rem_mitm;
struct hci_conn *conn;
BT_DBG("%s", hdev->name); BT_DBG("%s", hdev->name);
hci_dev_lock(hdev); hci_dev_lock(hdev);
if (test_bit(HCI_MGMT, &hdev->flags)) if (!test_bit(HCI_MGMT, &hdev->flags))
mgmt_user_confirm_request(hdev->id, &ev->bdaddr, ev->passkey); goto unlock;
conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
if (!conn)
goto unlock;
loc_mitm = (conn->auth_type & 0x01);
rem_mitm = (conn->remote_auth & 0x01);
/* If we require MITM but the remote device can't provide that
* (it has NoInputNoOutput) then reject the confirmation
* request. The only exception is when we're dedicated bonding
* initiators (connect_cfm_cb set) since then we always have the MITM
* bit set. */
if (!conn->connect_cfm_cb && loc_mitm && conn->remote_cap == 0x03) {
BT_DBG("Rejecting request: remote device can't provide MITM");
hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_NEG_REPLY,
sizeof(ev->bdaddr), &ev->bdaddr);
goto unlock;
}
/* If no side requires MITM protection; auto-accept */
if ((!loc_mitm || conn->remote_cap == 0x03) &&
(!rem_mitm || conn->io_capability == 0x03)) {
BT_DBG("Auto-accept of user confirmation");
hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY,
sizeof(ev->bdaddr), &ev->bdaddr);
goto unlock;
}
mgmt_user_confirm_request(hdev->id, &ev->bdaddr, ev->passkey);
unlock:
hci_dev_unlock(hdev); hci_dev_unlock(hdev);
} }