Subject: Re: [Bluez-users] rfcomm connect error Too many links(31)
From: Marcel Holtmann <marcel@holtmann.org>
To: bluez-users@lists.sourceforge.net
In-Reply-To: <20060118123739.GA39259@rucus.ru.ac.za>
References: <20060118123739.GA39259@rucus.ru.ac.za>
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Date: Wed, 18 Jan 2006 13:48:01 +0100

Hi David,

> I am trying to write a program that forwards one rfcomm connection to
> another connection, but each time I try make a 2nd connection out I get a
> "Too many links(31)" error. Attached is my code but here is some simple
> "psedo code" of it:
> 
> rcsocklisten = socket(PF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM)
> bind(rcsocklisten, (struct sockaddr *) &loc_addr, sizeof(loc_addr)
> listen(rcsocklisten, 4)
> rcsockin = accept(rcsocklisten, (struct sockaddr *)&rem_addr, &opt)
> rcsockout = socket(PF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM)
> bind(rcsockout, (struct sockaddr *) &addr, sizeof(addr)
> connect(rcsockout, (struct sockaddr *)&addr, sizeof(addr)
> --ERROR here--
> 
> hcidump -V -x shows the following:
> 
> < HCI Command: Create Connection (0x01|0x0005) plen 13
>     bdaddr 00:80:C8:26:FD:6D ptype 0xcc18 rswitch 0x01 clkoffset 0x0000
>     Packet type: DM1 DM3 DM5 DH1 DH3 DH5
> > HCI Event: Command Status (0x0f) plen 4
>     Create Connection (0x01|0x0005) status 0x00 ncmd 1
> > HCI Event: Connect Complete (0x03) plen 11
>     status 0x09 handle 0 bdaddr 00:80:C8:26:FD:6D type ACL encrypt 0x00
>     Error: Connection Limit Exceeded
> 
> The "Connection Limit Exceeded" is worry and confusing me as I have run
> mutiple rfcomm connections through this chip before.

but maybe not multiple ACL connections and this is what you need in your
case. So you need at least a CSR chip with HCI 18.x firmware or you
might wanna simply use another dongle. One for the incoming data and one
for the outgoing data.

Regards

Marcel


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