Error: sdptool browse --> Connection reset by peer

04 0F 04 00 01 01 04

HCI Event: Command Status (0x0f) plen 4

04 02 0F 01 99 CD B9 37 12 00 01 00 00 14 01 10 CB 1E

HCI Event: Inquiry Result (0x02) plen 15

04 02 0F 01 99 CD B9 37 12 00 01 00 00 14 01 10 CB 1E

HCI Event: Inquiry Result (0x02) plen 15

04 02 0F 01 99 CD B9 37 12 00 01 00 00 14 01 10 CA 1E

HCI Event: Inquiry Result (0x02) plen 15

04 02 0F 01 99 CD B9 37 12 00 01 00 00 14 01 10 CB 1E

HCI Event: Inquiry Result (0x02) plen 15

04 02 0F 01 99 CD B9 37 12 00 01 00 00 14 01 10 CB 1E

HCI Event: Inquiry Result (0x02) plen 15

04 02 0F 01 99 CD B9 37 12 00 01 00 00 14 01 10 CB 1E

HCI Event: Inquiry Result (0x02) plen 15

04 02 0F 01 99 CD B9 37 12 00 01 00 00 14 01 10 CB 1E

HCI Event: Inquiry Result (0x02) plen 15

04 02 0F 01 99 CD B9 37 12 00 01 00 00 14 01 10 CA 1E

HCI Event: Inquiry Result (0x02) plen 15

04 02 0F 01 99 CD B9 37 12 00 01 00 00 14 01 10 CB 1E

HCI Event: Inquiry Result (0x02) plen 15

04 02 0F 01 99 CD B9 37 12 00 01 00 00 14 01 10 CB 1E

HCI Event: Inquiry Result (0x02) plen 15

04 02 0F 01 99 CD B9 37 12 00 01 00 00 14 01 10 CA 1E

HCI Event: Inquiry Result (0x02) plen 15

04 01 01 00

HCI Event: Inquiry Complete (0x01) plen 1

04 0F 04 00 01 05 04

HCI Event: Command Status (0x0f) plen 4

04 03 0B 00 0C 00 99 CD B9 37 12 00 01 00

HCI Event: Connect Complete (0x03) plen 11

04 0E 06 01 0D 08 00 0C 00

HCI Event: Command Complete (0x0e) plen 6

04 05 04 00 0C 00 13

HCI Event: Disconn Complete (0x05) plen 4

I am getting an error ("Connection reset by peer") when I run an "sdptool browse" and it discovers my Sprint Pocket PC handset.

I'm sure this is probably a common situation. I have attached my "hcidump -V -R". Any help in deciphering this problem would be great. My goal is to send a .vcf file to the device.

Hi,

Quoted 4 lines

I am getting an error ("Connection reset by peer") when I run an "sdptool browse" and it discovers my Sprint Pocket PC handset.

I'm sure this is probably a common situation. I have attached my "hcidump -V -R". Any help in deciphering this problem would be great. My goal is to send a .vcf file to the device.

please include "hcidump -X -V".

Regards

Marcel

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Mr. Holtmann--

Thanks for the reply, but I'm having trouble replicating the situation. I'm having trouble in general I think. My bluetooth setup seems quite finicky and unstable. There are so many factors which affect this, it's hard to point the finger at any single point of failure. (Could be handheld devices, could be Linux, could be bluez, could be BT Dongle, could be kernel, etc.)

I can send you any notes on my configuration that may lend clues, just tell me where to start. I just ran an "apt-get upgrade" last night and haven't had much time to see if it helped at all yet.

Thanks,

jpf

Quoted 16 lines · Marcel Holtmann

Hi,

Quoted 4 lines

I am getting an error ("Connection reset by peer") when I run an "sdptool browse" and it discovers my Sprint Pocket PC handset.

I'm sure this is probably a common situation. I have attached my "hcidump -V -R". Any help in deciphering this problem would be great. My goal is to send a .vcf file to the device.

please include "hcidump -X -V".

Regards

Marcel

Quoted 11 lines

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Hi all,
I made some investigation about the BtOBEX_TransportConnect signaled to the list and Marcel some days before.
Openobex isn't involved in the problem, in my try I've writed from scatch a simple obex push client (not using openobex but only socket).
In my test I found this : if there are two thread (also two process) making something like

  ...
  ret = connect(fd, (struct sockaddr *)dst, sizeof(struct sockaddr_rd));
  ...

in simultaneous way the second always fail (return -1). I've also tryed to "protect" the connect using a mutex and all works but (naturally) second connection result conditioned to the frist (syncronous so thread it is not useful).

I think there is some solution to this but I don't know if it's using some ioctl on socket (nonbloking?) or some hci command to adapter. Please can some one give me some hint?

I'm looking at kernel source related to rfcomm (/usr/src/ linux-2.6.116/net/bluetooth/rfcomm/*.c) but I'm not sure the problem reside here...

thanks, bye
Fabrizio

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HCI Event: Command Status (0x0f) plen 4

HCI Event: Command Status (0x0f) plen 4

HCI Event: Connect Complete (0x03) plen 11

HCI Event: Number of Completed Packets (0x13) plen 5

HCI Event: Max Slots Change (0x1b) plen 3

ACL data: handle 42 flags 0x02 dlen 16

ACL data: handle 42 flags 0x02 dlen 16

HCI Event: Number of Completed Packets (0x13) plen 5

HCI Event: Number of Completed Packets (0x13) plen 5

ACL data: handle 42 flags 0x02 dlen 14

HCI Event: Number of Completed Packets (0x13) plen 5

ACL data: handle 42 flags 0x02 dlen 8

HCI Event: Number of Completed Packets (0x13) plen 5

ACL data: handle 42 flags 0x02 dlen 18

HCI Event: Number of Completed Packets (0x13) plen 5

ACL data: handle 42 flags 0x02 dlen 8

HCI Event: Number of Completed Packets (0x13) plen 5

ACL data: handle 42 flags 0x02 dlen 12

ACL data: handle 42 flags 0x02 dlen 12

HCI Event: Number of Completed Packets (0x13) plen 5

HCI Event: Number of Completed Packets (0x13) plen 5

HCI Event: Number of Completed Packets (0x13) plen 5

ACL data: handle 42 flags 0x02 dlen 9

Hi Fabrizio,

i'm working on a possibly related problem. Could you check the hcidump of your situation and look out for apparently unmotivated hci_reset commands sent to your device? =

Greetings & TIA

Andy

On Sat, 22 Jul 2006 16:08:08 +0200
Fabrizio Guglielmino <[email protected]> wrote:

=

Quoted 14 lines

Hi all,
I made some investigation about the BtOBEX_TransportConnect signaled =

to the list and Marcel some days before.
Openobex isn't involved in the problem, in my try I've writed from =

scatch a simple obex push client (not using openobex but only socket).
In my test I found this : if there are two thread (also two process) =

making something like

...
ret =3D connect(fd, (struct sockaddr *)dst, sizeof(struct sockaddr_rd)=

Quoted 21 lines

...

in simultaneous way the second always fail (return -1). I've also =

tryed to "protect" the connect using a mutex and all works but (naturally) second connection result conditioned to the frist =

(syncronous so thread it is not useful).

I think there is some solution to this but I don't know if it's using =

some ioctl on socket (nonbloking?) or some hci command to adapter. Please can some one give me some hint?

I'm looking at kernel source related to rfcomm (/usr/src/ =

linux-2.6.116/net/bluetooth/rfcomm/*.c) but I'm not sure the problem =

reside here...

Quoted 7 lines

thanks, bye
Fabrizio =

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Quoted 2 lines

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Quoted 5 lines

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    =

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Hi Andy,
I Andy the problem I have is described in following hcidump:

< HCI Command: Create Connection (0x01|0x0005) plen 13
bdaddr 00:09:2D:2A:68:20 ptype 0xcc18 rswitch 0x01 clkoffset 0x0000 Packet type: DM1 DM3 DM5 DH1 DH3 DH5

Quoted 1 line

HCI Event: Command Status (0x0f) plen 4

    Create Connection (0x01|0x0005) status 0x00 ncmd 1

< HCI Command: Create Connection (0x01|0x0005) plen 13
bdaddr 00:01:E3:25:53:44 ptype 0xcc18 rswitch 0x01 clkoffset 0x0000 Packet type: DM1 DM3 DM5 DH1 DH3 DH5

Quoted 1 line

HCI Event: Command Status (0x0f) plen 4

Create Connection (0x01|0x0005) status 0x0c ncmd 1
Error: Command Disallowed

Quoted 1 line

HCI Event: Connect Complete (0x03) plen 11

    status 0x00 handle 42 bdaddr 00:09:2D:2A:68:20 type ACL encrypt 0x00

< ACL data: handle 42 flags 0x02 dlen 12

    L2CAP(s): Connect req: psm 3 scid 0x0040

Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 42 packets 1

Quoted 1 line

HCI Event: Max Slots Change (0x1b) plen 3

handle 42 slots 5

Quoted 1 line

ACL data: handle 42 flags 0x02 dlen 16

    L2CAP(s): Connect rsp: dcid 0x0044 scid 0x0040 result 0 status 0
      Connection successful
< ACL data: handle 42 flags 0x02 dlen 16
    L2CAP(s): Config req: dcid 0x0044 flags 0x00 clen 4
      MTU 1024

Quoted 1 line

ACL data: handle 42 flags 0x02 dlen 16

    L2CAP(s): Config req: dcid 0x0040 flags 0x00 clen 4
      MTU 1691
< ACL data: handle 42 flags 0x02 dlen 14
    L2CAP(s): Config rsp: scid 0x0044 flags 0x00 result 0 clen 0
      Success

Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 42 packets 1

Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 42 packets 1

Quoted 1 line

ACL data: handle 42 flags 0x02 dlen 14

    L2CAP(s): Config rsp: scid 0x0040 flags 0x00 result 0 clen 0
      Success
< ACL data: handle 42 flags 0x02 dlen 8
    L2CAP(d): cid 0x0044 len 4 [psm 3]
      RFCOMM(s): SABM: cr 1 dlci 0 pf 1 ilen 0 fcs 0x1c

Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 42 packets 1

Quoted 1 line

ACL data: handle 42 flags 0x02 dlen 8

    L2CAP(d): cid 0x0040 len 4 [psm 3]
      RFCOMM(s): UA: cr 1 dlci 0 pf 1 ilen 0 fcs 0xd7

< ACL data: handle 42 flags 0x02 dlen 18
L2CAP(d): cid 0x0044 len 14 [psm 3]
RFCOMM(s): PN CMD: cr 1 dlci 0 pf 0 ilen 10 fcs 0x70 mcc_len 8 dlci 4 frame_type 0 credit_flow 15 pri 7 ack_timer 0 frame_size 1019 max_retrans 0 credits 7

Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 42 packets 1

Quoted 1 line

ACL data: handle 42 flags 0x02 dlen 18

L2CAP(d): cid 0x0040 len 14 [psm 3]
RFCOMM(s): PN RSP: cr 0 dlci 0 pf 0 ilen 10 fcs 0xaa mcc_len 8 dlci 4 frame_type 0 credit_flow 14 pri 0 ack_timer 0 frame_size 1019 max_retrans 0 credits 7
< ACL data: handle 42 flags 0x02 dlen 8

    L2CAP(d): cid 0x0044 len 4 [psm 3]
      RFCOMM(s): SABM: cr 1 dlci 4 pf 1 ilen 0 fcs 0x96

Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 42 packets 1

Quoted 1 line

ACL data: handle 42 flags 0x02 dlen 8

    L2CAP(d): cid 0x0040 len 4 [psm 3]
      RFCOMM(s): UA: cr 1 dlci 4 pf 1 ilen 0 fcs 0x5d
< ACL data: handle 42 flags 0x02 dlen 12
    L2CAP(d): cid 0x0044 len 8 [psm 3]
      RFCOMM(s): MSC CMD: cr 1 dlci 0 pf 0 ilen 4 fcs 0x70 mcc_len 2
      dlci 4 fc 0 rtc 1 rtr 1 ic 0 dv 1 b1 1 b2 1 b3 0 len 0

Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 42 packets 1

Quoted 1 line

ACL data: handle 42 flags 0x02 dlen 12

    L2CAP(d): cid 0x0040 len 8 [psm 3]
      RFCOMM(s): MSC RSP: cr 0 dlci 0 pf 0 ilen 4 fcs 0xaa mcc_len 2
      dlci 4 fc 0 rtc 1 rtr 1 ic 0 dv 1 b1 1 b2 1 b3 0 len 0

Quoted 1 line

ACL data: handle 42 flags 0x02 dlen 12

    L2CAP(d): cid 0x0040 len 8 [psm 3]
      RFCOMM(s): MSC CMD: cr 0 dlci 0 pf 0 ilen 4 fcs 0xaa mcc_len 2
      dlci 4 fc 0 rtc 1 rtr 1 ic 0 dv 1 b1 1 b2 1 b3 0 len 0
< ACL data: handle 42 flags 0x02 dlen 12
    L2CAP(d): cid 0x0044 len 8 [psm 3]
      RFCOMM(s): MSC RSP: cr 1 dlci 0 pf 0 ilen 4 fcs 0x70 mcc_len 2
      dlci 4 fc 0 rtc 1 rtr 1 ic 0 dv 1 b1 1 b2 1 b3 0 len 0
< ACL data: handle 42 flags 0x02 dlen 9
    L2CAP(d): cid 0x0044 len 5 [psm 3]
      RFCOMM(d): UIH: cr 1 dlci 4 pf 1 ilen 0 fcs 0x79 credits 33
< ACL data: handle 42 flags 0x02 dlen 25
    L2CAP(d): cid 0x0044 len 21 [psm 3]
      RFCOMM(d): UIH: cr 1 dlci 4 pf 0 ilen 17 fcs 0x65
      0000: 80 00 11 10 00 08 00 00  00 00 00 00 00 00 00 00  

................
0010: 00 .

Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 42 packets 1

Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 42 packets 1

Quoted 1 line

HCI Event: Number of Completed Packets (0x13) plen 5

handle 42 packets 1

Quoted 1 line

ACL data: handle 42 flags 0x02 dlen 9

    L2CAP(d): cid 0x0040 len 5 [psm 3]
      RFCOMM(d): UIH: cr 0 dlci 4 pf 1 ilen 0 fcs 0xa3 credits 23

As You can see the second Create Connection fails with a Command disallowed.....
In my case I've no see any hci_reset.....

thank your for that information. I guess your problem is just the same you had with sdp some while ago. A single BT Device can not *start* connecting to two different remote devices at the same time.

To solve this you have to find a way to:

1. Create Connection to device A
2. Wait until Connect Complete for A's bdaddr happens (no matter if failed or succ.)
3. Then continue with other Create Connection Commands

Hi Andreas,
=

Quoted 12 lines

thank your for that information. I guess your problem is just the same you had with sdp some while ago. A single BT Device can not *start* connecting to two different remote devices at the same time. =

=

To solve this you have to find a way to:
=

1. Create Connection to device A =

2. Wait until Connect Complete for A's bdaddr happens (no matter if fai=

Quoted 1 line

3. Then continue with other Create Connection Commands

=

we have a plan to make the L2CAP layer handle multiple ACL connects and try again if one attempt fails. However the last patch I wrote for it got lost somehow and it was broken anyway. The mailing list should contain a thread where I proposed how this must be handled. I don't have time to look at it at the moment. So if anybody wants to work on it, please do so and send in a patch.
=

Regards
=

Marcel
=

=

=

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Hi Marcel,

i see the problem here and studied the mails about that. We workaround it by retrying socket a couple of times which works OK even if it wont scale too good up to the theoretical maximum of connections.

In the moment I'm debugging some phenomena that sends hci_reset to hci devices that run more than one connection while pumping on maximum negotiated MTU (Obex Layer). I don't know where its coming from =

yet, I'll
keep you updated on my findings.

I would be happy joining the work on the L2CAP later.

Greetings

Andy

Quoted 42 lines · On Mon, 24 Jul 2006 18:35:12 +0200 Marcel Holtmann <[email protected]> wrote:

Hi Andreas,

Quoted 6 lines

thank your for that information. I guess your problem is just the =

same
you had with sdp some while ago. A single BT Device can not *start* connecting to two different remote devices at the same time.

Quoted 7 lines

To solve this you have to find a way to:

1. Create Connection to device A
2. Wait until Connect Complete for A's bdaddr happens (no matter =

if failed or succ.)
3. Then continue with other Create Connection Commands

we have a plan to make the L2CAP layer handle multiple ACL =

connects and
try again if one attempt fails. However the last patch I wrote for it got lost somehow and it was broken anyway. The mailing list should contain a thread where I proposed how this must be handled. I =

don't have
time to look at it at the moment. So if anybody wants to work on it, please do so and send in a patch.

Regards

Marcel

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Quoted 8 lines

cash
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-- =

-- =

mit freundlichen Gr=FC=DFen / best regards,

Andreas Gaufer

Office: +49 951-700428-91
Fax: +49 951-700428-87
Mail: [email protected]

I fully agree with RFC 1855

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Last solutions it's to see at l2cap layer and try to understand ho wo write the patch, if
I will succeed to find the past Marcel's thread about it I'll try to write this patch.

Hi Fabrizio,

=

Quoted 7 lines

Last solutions it's to see at l2cap layer and try to understand ho wo =

write the patch, if
I will succeed to find the past Marcel's thread about it I'll try to =

write this patch.

    =

it must look something like the attached one. However that one might crash your machine.

Regards

Marcel

=

------------------------------------------------------------------------

include/net/bluetooth/l2cap.h +2 -0

index 8242a0e..cb19e66 100644
@@ -183,6 +183,8 @@ struct l2cap_chan_list {
 };
 =
 
 struct l2cap_conn {
+	struct list_head list;
+
 	struct hci_conn	*hcon;
 =

include/net/bluetooth/l2cap.h +0 -0

 	bdaddr_t	*dst;

net/bluetooth/l2cap.c +3 -0

index eaaad65..1d1c423 100644
@@ -63,6 +63,9 @@ static struct bt_sock_list l2cap_sk_list
 	.lock =3D RW_LOCK_UNLOCKED
 };
 =
 
+static LIST_HEAD(l2cap_conn_list);
+static DEFINE_SPINLOCK(l2cap_conn_lock);
+
 static void __l2cap_sock_close(struct sock *sk, int reason);
 static void l2cap_sock_close(struct sock *sk);

static void l2cap_sock_kill(struct sock *sk);

net/bluetooth/l2cap.c +4 -0

@@ -295,6 +298,10 @@ static void l2cap_conn_del(struct hci_co
 =
 
 	BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
 =
 
+	spin_lock_bh(&l2cap_conn_lock);
+	list_del(&conn->list);
+	spin_unlock_bh(&l2cap_conn_lock);
+
 	if (conn->rx_skb)

net/bluetooth/l2cap.c +17 -12

 		kfree_skb(conn->rx_skb);
 =

@@ -642,18 +649,23 @@ static int l2cap_do_connect(struct sock =
 
 	sk->sk_state =3D BT_CONNECT;
 	l2cap_sock_set_timer(sk, sk->sk_sndtimeo);
 =
 
-	if (hcon->state =3D=3D BT_CONNECTED) {
-		if (sk->sk_type =3D=3D SOCK_SEQPACKET) {
-			struct l2cap_conn_req req;
-			l2cap_pi(sk)->ident =3D l2cap_get_ident(conn);
-			req.scid =3D __cpu_to_le16(l2cap_pi(sk)->scid);
-			req.psm  =3D l2cap_pi(sk)->psm;
-			l2cap_send_cmd(conn, l2cap_pi(sk)->ident,
-					L2CAP_CONN_REQ, sizeof(req), &req);
-		} else {
-			l2cap_sock_clear_timer(sk);
-			sk->sk_state =3D BT_CONNECTED;
-		}
+	if (hcon->state !=3D BT_CONNECTED) {
+		spin_lock_bh(&l2cap_conn_lock);
+		list_add_tail(&conn->list, &l2cap_conn_list);
+		spin_unlock_bh(&l2cap_conn_lock);
+		goto done;
+	}
+
+	if (sk->sk_type =3D=3D SOCK_SEQPACKET) {
+		struct l2cap_conn_req req;
+		l2cap_pi(sk)->ident =3D l2cap_get_ident(conn);
+		req.scid =3D __cpu_to_le16(l2cap_pi(sk)->scid);
+		req.psm  =3D l2cap_pi(sk)->psm;
+		l2cap_send_cmd(conn, l2cap_pi(sk)->ident,
+				L2CAP_CONN_REQ, sizeof(req), &req);
+	} else {
+		l2cap_sock_clear_timer(sk);
+		sk->sk_state =3D BT_CONNECTED;
 	}

=

done:

net/bluetooth/l2cap.c +27 -4

@@ -1926,12 +1938,35 @@ static int l2cap_connect_cfm(struct hci_
 	if (hcon->type !=3D ACL_LINK)
 		return 0;
 =
 
-	if (!status) {
+	switch (status) {
+	case 0x00:
 		conn =3D l2cap_conn_add(hcon, status);
-		if (conn)
-			l2cap_conn_ready(conn);
-	} else
+		if (!conn)
+			break;
+
+		spin_lock_bh(&l2cap_conn_lock);
+		list_del(&conn->list);
+		spin_unlock_bh(&l2cap_conn_lock);
+
+		l2cap_conn_ready(conn);
+
+		spin_lock_bh(&l2cap_conn_lock);
+		if (!list_empty(&l2cap_conn_list)) {
+			conn =3D list_entry(l2cap_conn_list.next, struct l2cap_conn, list);
+			list_move_tail(&conn->list, &l2cap_conn_list);
+			hci_conn_put(conn->hcon);
+			hci_connect(conn->hcon->hdev, ACL_LINK, conn->dst);
+		}
+		spin_unlock_bh(&l2cap_conn_lock);
+		break;
+
+	case 0x0c:
+		break;
+
+	default:
 		l2cap_conn_del(hcon, bt_err(status));
+		break;
+	}
 =
 

return 0;
}
=

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------------------------------------------------------------------------

_______________________________________________
Bluez-devel mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/bluez-devel
=

I Marcel,
I'm trying to use the patch to handle multiple l2cap connection, I'm =

not a kernel/modules expert developer so
I need a little help.
Firts I'm trying to understand what the patch do and I think it's =

clear (is used a linked list to handle multiple connection).

My problems are with kernel programming enviromnment:

1) I'm using kernel-2.6.10 I have to update to a more recent version?

2) Is there some documentation about bluez kernel modules? I need to =

understand how modules works to make try to make the patch.

Many thanks
Fabrizio

Marcel Holtmann ha scritto:

Quoted 158 lines

Hi Fabrizio,

=

Quoted 7 lines

Last solutions it's to see at l2cap layer and try to understand ho =

wo write the patch, if
I will succeed to find the past Marcel's thread about it I'll try =

to write this patch.

    =

it must look something like the attached one. However that one might crash your machine.

Regards

Marcel

=

------------------------------------------------------------------------

= renamed from include/net/bluetooth/l2cap.h +0 -0

b/include/net/bluetooth/l2cap.h
index 8242a0e..cb19e66 100644

include/net/bluetooth/l2cap.h +2 -0

@@ -183,6 +183,8 @@ struct l2cap_chan_list {
 };
 =
 
 struct l2cap_conn {
+    struct list_head list;
+
     struct hci_conn    *hcon;
 =

     bdaddr_t    *dst;

net/bluetooth/l2cap.c +3 -0

index eaaad65..1d1c423 100644
@@ -63,6 +63,9 @@ static struct bt_sock_list l2cap_sk_list
     .lock =3D RW_LOCK_UNLOCKED
 };
 =
 
+static LIST_HEAD(l2cap_conn_list);
+static DEFINE_SPINLOCK(l2cap_conn_lock);
+
 static void __l2cap_sock_close(struct sock *sk, int reason);
 static void l2cap_sock_close(struct sock *sk);

static void l2cap_sock_kill(struct sock *sk);

net/bluetooth/l2cap.c +4 -0

@@ -295,6 +298,10 @@ static void l2cap_conn_del(struct hci_co
 =
 
     BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
 =
 
+    spin_lock_bh(&l2cap_conn_lock);
+    list_del(&conn->list);
+    spin_unlock_bh(&l2cap_conn_lock);
+
     if (conn->rx_skb)

         kfree_skb(conn->rx_skb);

=

net/bluetooth/l2cap.c +17 -12

@@ -642,18 +649,23 @@ static int l2cap_do_connect(struct sock      =
 
 sk->sk_state =3D BT_CONNECT;
     l2cap_sock_set_timer(sk, sk->sk_sndtimeo);
 =
 
-    if (hcon->state =3D=3D BT_CONNECTED) {
-        if (sk->sk_type =3D=3D SOCK_SEQPACKET) {
-            struct l2cap_conn_req req;
-            l2cap_pi(sk)->ident =3D l2cap_get_ident(conn);
-            req.scid =3D __cpu_to_le16(l2cap_pi(sk)->scid);
-            req.psm  =3D l2cap_pi(sk)->psm;
-            l2cap_send_cmd(conn, l2cap_pi(sk)->ident,
-                    L2CAP_CONN_REQ, sizeof(req), &req);
-        } else {
-            l2cap_sock_clear_timer(sk);
-            sk->sk_state =3D BT_CONNECTED;
-        }
+    if (hcon->state !=3D BT_CONNECTED) {
+        spin_lock_bh(&l2cap_conn_lock);
+        list_add_tail(&conn->list, &l2cap_conn_list);
+        spin_unlock_bh(&l2cap_conn_lock);
+        goto done;
+    }
+
+    if (sk->sk_type =3D=3D SOCK_SEQPACKET) {
+        struct l2cap_conn_req req;
+        l2cap_pi(sk)->ident =3D l2cap_get_ident(conn);
+        req.scid =3D __cpu_to_le16(l2cap_pi(sk)->scid);
+        req.psm  =3D l2cap_pi(sk)->psm;
+        l2cap_send_cmd(conn, l2cap_pi(sk)->ident,
+                L2CAP_CONN_REQ, sizeof(req), &req);
+    } else {
+        l2cap_sock_clear_timer(sk);
+        sk->sk_state =3D BT_CONNECTED;
     }

=

done:

net/bluetooth/l2cap.c +27 -4

@@ -1926,12 +1938,35 @@ static int l2cap_connect_cfm(struct hci_
     if (hcon->type !=3D ACL_LINK)
         return 0;
 =
 
-    if (!status) {
+    switch (status) {
+    case 0x00:
         conn =3D l2cap_conn_add(hcon, status);
-        if (conn)
-            l2cap_conn_ready(conn);
-    } else
+        if (!conn)
+            break;
+
+        spin_lock_bh(&l2cap_conn_lock);
+        list_del(&conn->list);
+        spin_unlock_bh(&l2cap_conn_lock);
+
+        l2cap_conn_ready(conn);
+
+        spin_lock_bh(&l2cap_conn_lock);
+        if (!list_empty(&l2cap_conn_list)) {
+            conn =3D list_entry(l2cap_conn_list.next, struct =
 
 l2cap_conn, list);
+            list_move_tail(&conn->list, &l2cap_conn_list);
+            hci_conn_put(conn->hcon);
+            hci_connect(conn->hcon->hdev, ACL_LINK, conn->dst);
+        }
+        spin_unlock_bh(&l2cap_conn_lock);
+        break;
+
+    case 0x0c:
+        break;
+
+    default:
         l2cap_conn_del(hcon, bt_err(status));
+        break;
+    }

=

     return 0;

}
=

------------------------------------------------------------------------

------------------------------------------------------------------------=

Quoted 7 lines

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Quoted 8 lines

------------------------------------------------------------------------

_______________________________________________
Bluez-devel mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/bluez-devel
=

I'm trying to use the patch to handle multiple l2cap connection, I'm not a kernel/modules expert developer so
I need a little help.
Firts I'm trying to understand what the patch do and I think it's clear (is used a linked list to handle multiple connection).

My problems are with kernel programming enviromnment:

1) I'm using kernel-2.6.10 I have to update to a more recent version?

2) Is there some documentation about bluez kernel modules? I need to understand how modules works to make try to make the patch.

Hi Fabrizio,

=

Quoted 8 lines

I'm trying to use the patch to handle multiple l2cap connection, I'm not =

a kernel/modules expert developer so
I need a little help.
Firts I'm trying to understand what the patch do and I think it's clear =

(is used a linked list to handle multiple connection).

    =

one warning up-front. I never actually ran this patch on any machine. It is only compile tested. So it might crash your system.

=

Quoted 4 lines

My problems are with kernel programming enviromnment:

1) I'm using kernel-2.6.10 I have to update to a more recent version?

    =

It might work, but I advise you to develop against 2.6.18-rc2 or even the Git repository from Linus.

=

Quoted 4 lines

2) Is there some documentation about bluez kernel modules? I need to =

understand how modules works to make try to make the patch.

    =

Check out the kernel documentation itself. There exists no specific BlueZ documentation for kernel programming.

Regards

Marcel

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=

Hi I'm trying to play with the patch to make it work (as Marcel said it hangs my machine).

First I'm trying a simple debug by printing to find where it hangs...

There is a first question about this: various BT_DBG statements that print bluetooth address
in string format (using batostr) print them in reverse order(00:01:02.... is printed 02:01:00).
My test machine is a powerpc based mac, I've used in user-space the ba2str without problems in same architecture
so I'm confused about this.

An other dubt is about following log :

Jul 31 10:36:39 localhost kernel: [  596.604617] Bluetooth: 
00:00:00:00:00:00 -> 44:53:25:E3:01:00 psm 0x300
Jul 31 10:36:39 localhost kernel: [  596.606752] Bluetooth: 

00:00:00:00:00:00 -> 20:68:2A:2D:09:00 psm 0x300
(address are in reverse order as I said above)

Why psm is 0x300? May be also the psm in reverse order and really it's 0x003 (RFCOMM) as I would have expected ?

Hi Fabrizio,

Quoted 5 lines

Hi I'm trying to play with the patch to make it work (as Marcel said it hangs my machine).

First I'm trying a simple debug by printing to find where it hangs...

Quoted 8 lines

There is a first question about this: various BT_DBG statements that print bluetooth address
in string format (using batostr) print them in reverse order(00:01:02.... is printed 02:01:00).
My test machine is a powerpc based mac, I've used in user-space the ba2str without problems in same architecture
so I'm confused about this.

this is normal. We don't bother to swap the address for the debug messages. In Bluetooth the address is always used in the reversed order, but for the human eyes it is swapped.

Quoted 11 lines

An other dubt is about following log :

Jul 31 10:36:39 localhost kernel: [  596.604617] Bluetooth: 
00:00:00:00:00:00 -> 44:53:25:E3:01:00 psm 0x300
Jul 31 10:36:39 localhost kernel: [  596.606752] Bluetooth: 

00:00:00:00:00:00 -> 20:68:2A:2D:09:00 psm 0x300
(address are in reverse order as I said above)

Why psm is 0x300? May be also the psm in reverse order and really it's 0x003 (RFCOMM) as I would have expected ?

This looks like a big endian bug. The PSM value is in little endian order.

Regards

Marcel

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I have not made great progresses but I try to explain them looking some one can help me.
System hangs after l2cap_connect_cfm function, this is called for every device to which I try to connect to (in my case only 2).

In non-patched version of l2cap_connect_cfm there was a call to l2cap_conn_ready if status was 0x00 on a valid conn.
In patched version l2cap_conn_ready is no more called. l2cap_conn_ready it seems to execute the l2cap connection request so is
this a forgetfulness? I've try to insert the call but without success (system hangs again) so if the response to previous question is true this is not the only problem.