Hello,
I am working with BlueZ 3.22, kernel 2.6.24 on ARM and found 2 problems :
- I am not able to pair with some phones (Nokia N70 and sony-ericsson
P800). After some investigations, I found that a "L2CAP information
request packet" is sent just after the ACL connection. Both phones reply
with "command rejected" error, then disconnect the ACL link before BlueZ
is able to finish the pairing (see attached traces).
- with some other phones (LG 990 Viewty and sony-ericsson T610), the
kernel crashes after pairing initiated by the phone is completed.
For the first problem I removed the send of the "L2CAP information
request packet" in the kernel (see attached patch). This fixes both
problems.
I did not found any usage of the remote L2CAP information in kernel.
Is sending "L2CAP information request packet" mandatory for upper layer
and/or qualification ?
Is my fix OK ?
Regards
Fred
--
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It is not by improving the oil lamp that one invents the electric bulb!
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Danis Frederic Access Company
Software engineer
Mail : mailto:frederic.danis@xxxxxxxxxxxxxxxxxx
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HCI sniffer - Bluetooth packet analyzer ver 1.40
device: hci0 snap_len: 1028 filter: 0xffffffff
2008-12-08 18:59:46.112548 < HCI Command: Create Connection (0x01|0x0005) plen 13
bdaddr 00:0A:D9:14:D0:85 ptype 0xcc18 rswitch 0x01 clkoffset 0x0000
Packet type: DM1 DM3 DM5 DH1 DH3 DH5
2008-12-08 18:59:46.118621 > HCI Event: Command Status (0x0f) plen 4
Create Connection (0x01|0x0005) status 0x00 ncmd 1
2008-12-08 18:59:46.861053 > HCI Event: Connect Complete (0x03) plen 11
status 0x00 handle 1 bdaddr 00:0A:D9:14:D0:85 type ACL encrypt 0x00
2008-12-08 18:59:46.861145 < ACL data: handle 1 flags 0x02 dlen 10
L2CAP(s): Info req: type 2
2008-12-08 18:59:46.861175 < HCI Command: Read Remote Supported Features (0x01|0x001b) plen 2
handle 1
2008-12-08 18:59:46.861694 > HCI Event: Command Status (0x0f) plen 4
Unknown (0x00|0x0000) status 0x00 ncmd 2
2008-12-08 18:59:46.861724 < HCI Command: Write Link Policy Settings (0x02|0x000d) plen 4
handle 1 policy 0x07
Link policy: RSWITCH HOLD SNIFF
2008-12-08 18:59:46.865875 > HCI Event: Command Status (0x0f) plen 4
Read Remote Supported Features (0x01|0x001b) status 0x00 ncmd 1
2008-12-08 18:59:46.865936 < HCI Command: Remote Name Request (0x01|0x0019) plen 10
bdaddr 00:0A:D9:14:D0:85 mode 2 clkoffset 0x0000
2008-12-08 18:59:46.869110 > HCI Event: Command Status (0x0f) plen 4
Remote Name Request (0x01|0x0019) status 0x0c ncmd 0
Error: Command Disallowed
2008-12-08 18:59:46.927276 > HCI Event: Max Slots Change (0x1b) plen 3
handle 1 slots 5
2008-12-08 18:59:46.952514 > HCI Event: Number of Completed Packets (0x13) plen 5
handle 1 packets 1
2008-12-08 18:59:46.956176 > ACL data: handle 1 flags 0x02 dlen 10
L2CAP(s): Command rej: reason 0
Command not understood
2008-12-08 18:59:46.956970 > HCI Event: Read Remote Supported Features (0x0b) plen 11
status 0x00 handle 1
Features: 0xff 0xfb 0x01 0x00 0x00 0x00 0x00 0x00
2008-12-08 18:59:46.960357 > HCI Event: Command Status (0x0f) plen 4
Unknown (0x00|0x0000) status 0x00 ncmd 1
2008-12-08 18:59:46.960418 < HCI Command: Authentication Requested (0x01|0x0011) plen 2
handle 1
2008-12-08 18:59:46.961029 > HCI Event: Command Complete (0x0e) plen 6
Write Link Policy Settings (0x02|0x000d) ncmd 2
status 0x00 handle 1
2008-12-08 18:59:46.963562 > HCI Event: Command Status (0x0f) plen 4
Authentication Requested (0x01|0x0011) status 0x00 ncmd 1
2008-12-08 18:59:46.964233 > HCI Event: Link Key Request (0x17) plen 6
bdaddr 00:0A:D9:14:D0:85
2008-12-08 18:59:46.972442 < HCI Command: Link Key Request Negative Reply (0x01|0x000c) plen 6
bdaddr 00:0A:D9:14:D0:85
2008-12-08 18:59:46.977661 > HCI Event: Command Complete (0x0e) plen 10
Link Key Request Negative Reply (0x01|0x000c) ncmd 1
status 0x00 bdaddr 00:0A:D9:14:D0:85
2008-12-08 18:59:46.978271 > HCI Event: PIN Code Request (0x16) plen 6
bdaddr 00:0A:D9:14:D0:85
2008-12-08 18:59:51.145141 > HCI Event: Auth Complete (0x06) plen 3
status 0x05 handle 1
Error: Authentication Failure
2008-12-08 18:59:51.145690 > HCI Event: Command Status (0x0f) plen 4
Unknown (0x00|0x0000) status 0x00 ncmd 2
2008-12-08 18:59:51.176605 > HCI Event: Disconn Complete (0x05) plen 4
status 0x00 handle 1 reason 0x13
Reason: Remote User Terminated Connection
--- 2.6_kernel.orig/net/bluetooth/l2cap.c 2008-11-27 04:58:06.000000000 +0100
+++ 2.6_kernel/net/bluetooth/l2cap.c 2009-02-03 16:43:18.000000000 +0100
@@ -2064,7 +2064,7 @@
if (!status) {
conn = l2cap_conn_add(hcon, status);
if (conn)
- l2cap_conn_ready(conn);
+ l2cap_conn_start(conn);
} else
l2cap_conn_del(hcon, bt_err(status));
