Bluetooth: Allow 3D profile to use security mode 4 level 0
The PSM 0x0021 is dedicated to the 3D profile and has permission to
use security mode 4 level 0 for L2CAP connectionless unicast data
transfers.
When establishing a L2CAP connectionless channel on PSM 0x0021, it
will no longer force Secure Simple Pairing.
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
diff --git a/include/net/bluetooth/l2cap.h b/include/net/bluetooth/l2cap.h
index f141b5f..12523c7 100644
--- a/include/net/bluetooth/l2cap.h
+++ b/include/net/bluetooth/l2cap.h
@@ -237,6 +237,7 @@
/* protocol/service multiplexer (PSM) */
#define L2CAP_PSM_SDP 0x0001
#define L2CAP_PSM_RFCOMM 0x0003
+#define L2CAP_PSM_3DSP 0x0021
/* channel indentifier */
#define L2CAP_CID_SIGNALING 0x0001
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index cc51cb8..e932ffd 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -688,6 +688,16 @@
return HCI_AT_NO_BONDING;
}
break;
+ case L2CAP_CHAN_CONN_LESS:
+ if (chan->psm == __constant_cpu_to_le16(L2CAP_PSM_3DSP)) {
+ if (chan->sec_level == BT_SECURITY_LOW)
+ chan->sec_level = BT_SECURITY_SDP;
+ }
+ if (chan->sec_level == BT_SECURITY_HIGH)
+ return HCI_AT_NO_BONDING_MITM;
+ else
+ return HCI_AT_NO_BONDING;
+ break;
case L2CAP_CHAN_CONN_ORIENTED:
if (chan->psm == __constant_cpu_to_le16(L2CAP_PSM_SDP)) {
if (chan->sec_level == BT_SECURITY_LOW)
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index bee98eb..bd6fe7f 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -101,6 +101,10 @@
goto done;
switch (chan->chan_type) {
+ case L2CAP_CHAN_CONN_LESS:
+ if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_3DSP)
+ chan->sec_level = BT_SECURITY_SDP;
+ break;
case L2CAP_CHAN_CONN_ORIENTED:
if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_SDP ||
__le16_to_cpu(la.l2_psm) == L2CAP_PSM_RFCOMM)