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authorJohan Hedberg <johan.hedberg@intel.com>2015-10-12 13:36:19 +0200
committerMarcel Holtmann <marcel@holtmann.org>2015-10-21 00:49:21 +0200
commitcad20c278085d893ebd616cd20c0747a8e9d53c7 (patch)
tree04bde6709e83fd472e0da063ab08a8d9f52cd936 /net/bluetooth
parentBluetooth: Queue diagnostic messages together with HCI packets (diff)
downloadlinux-cad20c278085d893ebd616cd20c0747a8e9d53c7.tar.xz
linux-cad20c278085d893ebd616cd20c0747a8e9d53c7.zip
Bluetooth: Don't use remote address type to decide IRK persistency
There are LE devices on the market that start off by announcing their public address and then once paired switch to using private address. To be interoperable with such devices we should simply trust the fact that we're receiving an IRK from them to indicate that they may use private addresses in the future. Instead, simply tie the persistency to the bonding/no-bonding information the same way as for LTKs and CSRKs. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/bluetooth')
-rw-r--r--net/bluetooth/mgmt.c18
-rw-r--r--net/bluetooth/smp.c33
2 files changed, 19 insertions, 32 deletions
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index c4fe2fee753f..33a8564397b4 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -7873,27 +7873,13 @@ void mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, bool persistent)
mgmt_event(MGMT_EV_NEW_LONG_TERM_KEY, hdev, &ev, sizeof(ev), NULL);
}
-void mgmt_new_irk(struct hci_dev *hdev, struct smp_irk *irk)
+void mgmt_new_irk(struct hci_dev *hdev, struct smp_irk *irk, bool persistent)
{
struct mgmt_ev_new_irk ev;
memset(&ev, 0, sizeof(ev));
- /* For identity resolving keys from devices that are already
- * using a public address or static random address, do not
- * ask for storing this key. The identity resolving key really
- * is only mandatory for devices using resolvable random
- * addresses.
- *
- * Storing all identity resolving keys has the downside that
- * they will be also loaded on next boot of they system. More
- * identity resolving keys, means more time during scanning is
- * needed to actually resolve these addresses.
- */
- if (bacmp(&irk->rpa, BDADDR_ANY))
- ev.store_hint = 0x01;
- else
- ev.store_hint = 0x00;
+ ev.store_hint = persistent;
bacpy(&ev.rpa, &irk->rpa);
bacpy(&ev.irk.addr.bdaddr, &irk->bdaddr);
diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
index 25644e1bc479..229d88eebf4e 100644
--- a/net/bluetooth/smp.c
+++ b/net/bluetooth/smp.c
@@ -1046,8 +1046,24 @@ static void smp_notify_keys(struct l2cap_conn *conn)
struct smp_cmd_pairing *rsp = (void *) &smp->prsp[1];
bool persistent;
+ if (hcon->type == ACL_LINK) {
+ if (hcon->key_type == HCI_LK_DEBUG_COMBINATION)
+ persistent = false;
+ else
+ persistent = !test_bit(HCI_CONN_FLUSH_KEY,
+ &hcon->flags);
+ } else {
+ /* The LTKs, IRKs and CSRKs should be persistent only if
+ * both sides had the bonding bit set in their
+ * authentication requests.
+ */
+ persistent = !!((req->auth_req & rsp->auth_req) &
+ SMP_AUTH_BONDING);
+ }
+
if (smp->remote_irk) {
- mgmt_new_irk(hdev, smp->remote_irk);
+ mgmt_new_irk(hdev, smp->remote_irk, persistent);
+
/* Now that user space can be considered to know the
* identity address track the connection based on it
* from now on (assuming this is an LE link).
@@ -1075,21 +1091,6 @@ static void smp_notify_keys(struct l2cap_conn *conn)
}
}
- if (hcon->type == ACL_LINK) {
- if (hcon->key_type == HCI_LK_DEBUG_COMBINATION)
- persistent = false;
- else
- persistent = !test_bit(HCI_CONN_FLUSH_KEY,
- &hcon->flags);
- } else {
- /* The LTKs and CSRKs should be persistent only if both sides
- * had the bonding bit set in their authentication requests.
- */
- persistent = !!((req->auth_req & rsp->auth_req) &
- SMP_AUTH_BONDING);
- }
-
-
if (smp->csrk) {
smp->csrk->bdaddr_type = hcon->dst_type;
bacpy(&smp->csrk->bdaddr, &hcon->dst);