From: Stephen Crane <steve.crane@rococosoft.com>
To: albert@csail.mit.edu
Cc: bluez-devel@lists.sourceforge.net
Subject: Re: [Bluez-devel] can bluez dynamically allocate l2cap psm?
Date: Wed, 12 May 2004 10:17:40 +0100 [thread overview]
Message-ID: <1084353460.2834.6.camel@baroque.rococosoft.com> (raw)
In-Reply-To: <ef9938ec04051118174f3302f3@mail.gmail.com>
Hi Albert,
At the moment you have to cycle through the available PSMs trying to
bind to each one. BlueZ sockets don't yet support binding to PSM_ANY.
Steve
On Wed, 2004-05-12 at 02:17, Albert Huang wrote:
> I want a simple client/server that operates as follows.
>
> server listens for l2cap connections. accepts a connection, does
> something with it.
>
> client discovers server by entering inquiry mode and then checking SDP
> records for service id of the server.
>
> I don't want to hard-code the l2cap psm, as that seems like it defeats
> half the point of SDP, but I can't figure out how to request a dynamic
> psm. I want to be able to do somethiing like this:
>
> int s;
> struct sockaddr_l2 s_addr;
> s = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP);
>
> s_addr.l2_family = AF_BLUETOOTH;
> bacopy( &s_addr.l2_bdaddr, BDADDR_ANY );
> s_addr.l2_psm = L2CAP_PSM_ANY;
>
> bind(s, (struct sockaddr *)&s_addr, sizeof(s_addr) );
>
> struct sockaddr_l2 local_addr;
> struct socklen_t addr_len = sizeof(local_addr);
> getsockname( s, (struct sockaddr *)&local_addr, &addr_len);
> int psm = btohs( local_addr.l2_psm );
>
> // register service with SDP using dynamic psm
>
>
> Is this possible with bluez? Or do I have to do the ugly thing and
> pick an arbitrary psm?
>
> thanks!
> -albert
>
>
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Stephen Crane, Rococo Software Ltd. http://www.rococosoft.com
steve.crane@rococosoft.com +353-1-6601315 (ext 209)
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prev parent reply other threads:[~2004-05-12 9:17 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-12 1:17 [Bluez-devel] can bluez dynamically allocate l2cap psm? Albert Huang
2004-05-12 9:17 ` Stephen Crane [this message]
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