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c569242cd4
We have a BT headset (Lenovo Thinkplus XT99), the pairing and connecting has no problem, once this headset is paired, bluez will remember this device and will auto re-connect it whenever the device is powered on. The auto re-connecting works well with Windows and Android, but with Linux, it always fails. Through debugging, we found at the rfcomm connection stage, the bluetooth stack reports "Connection refused - security block (0x0003)". For this device, the re-connecting negotiation process is different from other BT headsets, it sends the Link_KEY_REQUEST command before the CONNECT_REQUEST completes, and it doesn't send ENCRYPT_CHANGE command during the negotiation. When the device sends the "connect complete" to hci, the ev->encr_mode is 1. So here in the conn_complete_evt(), if ev->encr_mode is 1, link type is ACL and HCI_CONN_ENCRYPT is not set, we set HCI_CONN_ENCRYPT to this conn, and update conn->enc_key_size accordingly. After this change, this BT headset could re-connect with Linux successfully. This is the btmon log after applying the patch, after receiving the "Connect Complete" with "Encryption: Enabled", will send the command to read encryption key size: > HCI Event: Connect Request (0x04) plen 10 Address: 8C:3C:AA:D8:11:67 (OUI 8C-3C-AA) Class: 0x240404 Major class: Audio/Video (headset, speaker, stereo, video, vcr) Minor class: Wearable Headset Device Rendering (Printing, Speaker) Audio (Speaker, Microphone, Headset) Link type: ACL (0x01) ... > HCI Event: Link Key Request (0x17) plen 6 Address: 8C:3C:AA:D8:11:67 (OUI 8C-3C-AA) < HCI Command: Link Key Request Reply (0x01|0x000b) plen 22 Address: 8C:3C:AA:D8:11:67 (OUI 8C-3C-AA) Link key: ${32-hex-digits-key} ... > HCI Event: Connect Complete (0x03) plen 11 Status: Success (0x00) Handle: 256 Address: 8C:3C:AA:D8:11:67 (OUI 8C-3C-AA) Link type: ACL (0x01) Encryption: Enabled (0x01) < HCI Command: Read Encryption Key... (0x05|0x0008) plen 2 Handle: 256 < ACL Data TX: Handle 256 flags 0x00 dlen 10 L2CAP: Information Request (0x0a) ident 1 len 2 Type: Extended features supported (0x0002) > HCI Event: Command Complete (0x0e) plen 7 Read Encryption Key Size (0x05|0x0008) ncmd 1 Status: Success (0x00) Handle: 256 Key size: 16 Cc: stable@vger.kernel.org Link: https://github.com/bluez/bluez/issues/704 Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de> Reviewed-by: Luiz Augusto von Dentz <luiz.dentz@gmail.com> Signed-off-by: Hui Wang <hui.wang@canonical.com> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> |
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6lowpan | ||
9p | ||
802 | ||
8021q | ||
appletalk | ||
atm | ||
ax25 | ||
batman-adv | ||
bluetooth | ||
bpf | ||
bridge | ||
caif | ||
can | ||
ceph | ||
core | ||
dcb | ||
dccp | ||
devlink | ||
dns_resolver | ||
dsa | ||
ethernet | ||
ethtool | ||
handshake | ||
hsr | ||
ieee802154 | ||
ife | ||
ipv4 | ||
ipv6 | ||
iucv | ||
kcm | ||
key | ||
l2tp | ||
l3mdev | ||
lapb | ||
llc | ||
mac80211 | ||
mac802154 | ||
mctp | ||
mpls | ||
mptcp | ||
ncsi | ||
netfilter | ||
netlabel | ||
netlink | ||
netrom | ||
nfc | ||
nsh | ||
openvswitch | ||
packet | ||
phonet | ||
psample | ||
qrtr | ||
rds | ||
rfkill | ||
rose | ||
rxrpc | ||
sched | ||
sctp | ||
smc | ||
strparser | ||
sunrpc | ||
switchdev | ||
tipc | ||
tls | ||
unix | ||
vmw_vsock | ||
wireless | ||
x25 | ||
xdp | ||
xfrm | ||
compat.c | ||
devres.c | ||
Kconfig | ||
Kconfig.debug | ||
Makefile | ||
socket.c | ||
sysctl_net.c |