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Bluetooth: BR/EDR: Add pairing mode flag

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Since right now the stack supports as acceptor pre-2.1 devices pairing,
start set the state pairing flag in legacy PIN request handler and
resets it on Encryption Changed event.
When connection is 'in-pairing' mode disallow of local user to trigger
change security level on link.

> HCI Event: Command Status (0x0f) plen 4
	Accept Connection Request (0x01|0x0009) ncmd 1
	Status: Success (0x00)
> HCI Event: PIN Code Request (0x16) plen 6
	Address: 00:1A:7D:DA:71:13 (cyber-blue(HK)Ltd)
< HCI Command: PIN Code Request Reply (0x01|0x000d) plen 23
	Address: 00:1A:7D:DA:71:13 (cyber-blue(HK)Ltd)
	PIN length: 4
	PIN code: 1234
> HCI Event: Command Complete (0x0e) plen 10
	PIN Code Request Reply (0x01|0x000d) ncmd 1
	Status: Success (0x00)
	Address: 00:1A:7D:DA:71:13 (cyber-blue(HK)Ltd)
> HCI Event: Link Key Notification (0x18) plen 23
	Address: 00:1A:7D:DA:71:13 (cyber-blue(HK)Ltd)
	Link key: 2a4eae1018ed248064166e765d946313
	Key type: Combination key (0x00)
> HCI Event: Connect Complete (0x03) plen 11
	Status: Success (0x00)
	Handle: 12
	Address: 00:1A:7D:DA:71:13 (cyber-blue(HK)Ltd)
	Link type: ACL (0x01)
	Encryption: Disabled (0x00)
> ACL Data RX: Handle 12 flags 0x02 dlen 10
	L2CAP: Information Request (0x0a) ident 1 len 2
	Type: Extended features supported (0x0002)
< HCI Command: Host Number of Completed Packets (0x03|0x0035) plen 5
	Num handles: 1
	Handle: 12
	Count: 1
> HCI Event: Encryption Change (0x08) plen 4
	Status: Success (0x00)
	Handle: 12
	Encryption: Enabled with E0 (0x01)

Change-Id: I5cbdaab1d6d52197795bfffd465ba59216afee00
Signed-off-by: Arkadiusz Lichwa <arkadiusz.lichwa@tieto.com>
This commit is contained in:
Arkadiusz Lichwa 2016-02-19 12:16:38 +01:00 • committed by Gerrit Code Review
commit dcd04f2a68
3 changed files with 13 additions and 0 deletions
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11
net/bluetooth/conn.c
View file

@ -180,6 +180,16 @@ void bt_conn_security_changed(struct bt_conn *conn)
static int start_security(struct bt_conn *conn)
{
#if defined(CONFIG_BLUETOOTH_BREDR)
if (conn->type == BT_CONN_TYPE_BR) {
if (atomic_test_bit(conn->flags, BT_CONN_BR_PAIRING)) {
return -EBUSY;
}
return -EPERM;
}
#endif /* CONFIG_BLUETOOTH_BREDR */
switch (conn->role) {
#if defined(CONFIG_BLUETOOTH_CENTRAL) && defined(CONFIG_BLUETOOTH_SMP)
case BT_HCI_ROLE_MASTER:
@ -1153,6 +1163,7 @@ void bt_conn_pin_code_req(struct bt_conn *conn)
}
atomic_set_bit(conn->flags, BT_CONN_USER);
atomic_set_bit(conn->flags, BT_CONN_BR_PAIRING);
bt_auth->pincode_entry(conn, secure);
} else {
pin_code_neg_reply(&conn->br.dst);

1
net/bluetooth/conn_internal.h
View file

@ -31,6 +31,7 @@ enum {
BT_CONN_AUTO_CONNECT,
BT_CONN_BR_LEGACY_SECURE, /* 16 digits legacy PIN tracker */
BT_CONN_USER, /* user I/O when pairing */
BT_CONN_BR_PAIRING, /* BR connection in pairing context */
};
struct bt_conn_le {

1
net/bluetooth/hci_core.c
View file

@ -1242,6 +1242,7 @@ static void hci_encrypt_change(struct net_buf *buf)
#if defined(CONFIG_BLUETOOTH_BREDR)
} else {
update_sec_level_br(conn);
atomic_clear_bit(conn->flags, BT_CONN_BR_PAIRING);
#endif /* CONFIG_BLUETOOTH_BREDR */
}