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Bluetooth: Add MGMT handlers for dealing with SMP LTK's

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This adds a method to notify that a new LTK is available and
a handler to store keys coming from userspace into the kernel LTK
list.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Vinicius Costa Gomes 2012-02-02 21:08:02 -03:00 committed by Johan Hedberg
parent c9839a11c0
commit 346af67b8d
2 changed files with 82 additions and 0 deletions
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2
include/net/bluetooth/hci_core.h
View File

@ -995,6 +995,8 @@ int mgmt_discovering(struct hci_dev *hdev, u8 discovering);
int mgmt_device_blocked(struct hci_dev *hdev, bdaddr_t *bdaddr);
int mgmt_device_unblocked(struct hci_dev *hdev, bdaddr_t *bdaddr);
int mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, u8 persistent);
/* HCI info for socket */
#define hci_pi(sk) ((struct hci_pinfo *) sk)

80
net/bluetooth/mgmt.c
View File

@ -2191,6 +2191,60 @@ done:
return err;
}
static int load_long_term_keys(struct sock *sk, u16 index,
void *cp_data, u16 len)
{
struct hci_dev *hdev;
struct mgmt_cp_load_long_term_keys *cp = cp_data;
u16 key_count, expected_len;
int i;
if (len < sizeof(*cp))
return cmd_status(sk, index, MGMT_OP_LOAD_LONG_TERM_KEYS,
EINVAL);
key_count = get_unaligned_le16(&cp->key_count);
expected_len = sizeof(*cp) + key_count *
sizeof(struct mgmt_ltk_info);
if (expected_len != len) {
BT_ERR("load_keys: expected %u bytes, got %u bytes",
len, expected_len);
return cmd_status(sk, index, MGMT_OP_LOAD_LONG_TERM_KEYS,
EINVAL);
}
hdev = hci_dev_get(index);
if (!hdev)
return cmd_status(sk, index, MGMT_OP_LOAD_LONG_TERM_KEYS,
ENODEV);
BT_DBG("hci%u key_count %u", index, key_count);
hci_dev_lock(hdev);
hci_smp_ltks_clear(hdev);
for (i = 0; i < key_count; i++) {
struct mgmt_ltk_info *key = &cp->keys[i];
u8 type;
if (key->master)
type = HCI_SMP_LTK;
else
type = HCI_SMP_LTK_SLAVE;
hci_add_ltk(hdev, &key->addr.bdaddr, key->addr.type,
type, 0, key->authenticated, key->val,
key->enc_size, key->ediv, key->rand);
}
hci_dev_unlock(hdev);
hci_dev_put(hdev);
return 0;
}
int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen)
{
void *buf;
@ -2325,6 +2379,9 @@ int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen)
case MGMT_OP_UNBLOCK_DEVICE:
err = unblock_device(sk, index, cp, len);
break;
case MGMT_OP_LOAD_LONG_TERM_KEYS:
err = load_long_term_keys(sk, index, cp, len);
break;
default:
BT_DBG("Unknown op %u", opcode);
err = cmd_status(sk, index, opcode,
@ -2478,6 +2535,29 @@ int mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
return mgmt_event(MGMT_EV_NEW_LINK_KEY, hdev, &ev, sizeof(ev), NULL);
}
int mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, u8 persistent)
{
struct mgmt_ev_new_long_term_key ev;
memset(&ev, 0, sizeof(ev));
ev.store_hint = persistent;
bacpy(&ev.key.addr.bdaddr, &key->bdaddr);
ev.key.addr.type = key->bdaddr_type;
ev.key.authenticated = key->authenticated;
ev.key.enc_size = key->enc_size;
ev.key.ediv = key->ediv;
if (key->type == HCI_SMP_LTK)
ev.key.master = 1;
memcpy(ev.key.rand, key->rand, sizeof(key->rand));
memcpy(ev.key.val, key->val, sizeof(key->val));
return mgmt_event(MGMT_EV_NEW_LONG_TERM_KEY, hdev,
&ev, sizeof(ev), NULL);
}
int mgmt_device_connected(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
u8 addr_type, u8 *name, u8 name_len,
u8 *dev_class)