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Bluetooth: BR/EDR: Reuse link key if available

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When link key exists in keys database and subsequent connection wants
to use it, reassign such link key to corresponding connection object.

< HCI Command: Accept Connection Request (0x01|0x0009) plen 7
	Address: 68:17:29:CF:5D:86 (Intel Corporate)
	Role: Slave (0x01)
> HCI Event: Command Status (0x0f) plen 4
	Accept Connection Request (0x01|0x0009) ncmd 1
	Status: Success (0x00)
> HCI Event: Connect Complete (0x03) plen 11
	Status: Success (0x00)
	Handle: 72
	Address: 68:17:29:CF:5D:86 (Intel Corporate)
	Link type: ACL (0x01)
	Encryption: Disabled (0x00)
> HCI Event: Link Key Request (0x17) plen 6
	Address: 68:17:29:CF:5D:86 (Intel Corporate)
< HCI Command: Link Key Request Reply (0x01|0x000b) plen 22
	Address: 68:17:29:CF:5D:86 (Intel Corporate)
	Link key: 62329a517ec1664361c6578e67e71f22
> HCI Event: Command Complete (0x0e) plen 10
	Link Key Request Reply (0x01|0x000b) ncmd 1
	Status: Success (0x00)
	Address: 68:17:29:CF:5D:86 (Intel Corporate)
> HCI Event: Encryption Change (0x08) plen 4
	Status: Success (0x00)
	Handle: 72
	Encryption: Enabled with E0 (0x01)

Change-Id: I409904dc739e600d3418f7d3ffb1a2dc9ea3a411
Signed-off-by: Arkadiusz Lichwa <arkadiusz.lichwa@tieto.com>
This commit is contained in:
Arkadiusz Lichwa 2016-03-03 11:15:49 +01:00 • committed by Gerrit Code Review
commit 3f6fdacdc6
1 changed files with 16 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

21
net/bluetooth/hci_core.c
View file

@ -1100,18 +1100,29 @@ static void link_key_reply(const bt_addr_t *bdaddr, const uint8_t *lk)
static void link_key_req(struct net_buf *buf)
{
struct bt_hci_evt_link_key_req *evt = (void *)buf->data;
struct bt_keys *keys;
struct bt_conn *conn;
BT_DBG("%s", bt_addr_str(&evt->bdaddr));
keys = bt_keys_find_link_key(&evt->bdaddr);
if (!keys) {
BT_ERR("Can't find keys for %s", bt_addr_str(&evt->bdaddr));
conn = bt_conn_lookup_addr_br(&evt->bdaddr);
if (!conn) {
BT_ERR("Can't find conn for %s", bt_addr_str(&evt->bdaddr));
link_key_neg_reply(&evt->bdaddr);
return;
}
link_key_reply(&evt->bdaddr, keys->link_key.val);
if (!conn->keys) {
conn->keys = bt_keys_find_link_key(&evt->bdaddr);
}
if (!conn->keys) {
link_key_neg_reply(&evt->bdaddr);
bt_conn_unref(conn);
return;
}
link_key_reply(&evt->bdaddr, conn->keys->link_key.val);
bt_conn_unref(conn);
}
static void io_capa_resp(struct net_buf *buf)