Re: [Bluez-devel] help needed with rfcomm

[Rui Silva <rukinhas@gmail.com>]

On 8/24/05, Marcel Holtmann <marcel@holtmann.org> wrote:
> Hi Rui,
>=20
> > i tried to post these doubts under the bluez-users mailing list, but i
> > did'nt have any response, and since it has a programing doubt, i'll
> > try to explain my problem.
> >
> > i want to buil an aplication that listen on rfcomm bluetooth sockets
> > and the same aplication receives information thru that socket. i kinda
> > have a squeleton of the program as folows:
> >
> >
> >         // cria o socket
> >         if( (sock =3D socket(PF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM)=
)
> > < 0){
> >         perror("socket");
> >         return(-1);
> >         }
> >
> >         // op=E7=F5es do socket
> >         addr.rc_family =3D AF_BLUETOOTH;
> >         str2ba(argv[1],&addr.rc_bdaddr);
> >         addr.rc_channel =3D htobs(CHANNEL);
>=20
> the htobs() is wrong here. The channel is uint8 value and thus a endian
> change is not needed.
>=20
> >         alen =3D sizeof(addr);
> >
> >         //regista o socket no SO
> >         if(bind(sock, (struct sockaddr *)&addr, alen) < 0){
> >                 perror("bind");
> >                 return(-1);
> >         }
> >         //poe o socket =E0 escuta
> >         listen(sock,QUEUE);
> >
> >         printf("Waiting for connections...\n\n");
> >
> >         while (1){
> >                 while((client =3D accept(sock, (struct sockaddr *)&addr=
,
> > &alen)) !=3D -1){
> >                         printf("Got a connection attempt!\n");
> >
> >                         memset(buffer, 0, TAM_BUFFER);
> >
> >                         if ( (r =3D read(client, buffer, TAM_BUFFER)) <=
 0
> >  ){
> >                                 perror("Read no server");
> >                         }
> >
> > but i can't get the connections to this computer to work. a i don't kno=
w why.
> >
> > another problem that i had was that the SPP profile has not
> > advertized, and i solved that problem by performing a "sdptool add
> > SP".
> >
> > anyway, with or without my program, i can't get the computer to accept
> > the connection attemps from other computers. these connections are
> > made using rfcomm on channel 1, and i can't change that.
> > my kernel was all the bluez stuff compiled in, not as modules.
> >
> > any sugestions will be apreciated
> >
> > so any ideia on how to solve this problem. I lacking time to
> > accomplish this program so i would really aprecciate all the hep that
> > you can give me..
>=20
> Run "hcidump -X -V" to see what happens. Run "sdptool browse local" to
> see what channel is advertised for your serial port service.
>=20
> Regards
>=20
> Marcel

i tried your changes but it didn't help. i thank anyway for your help
i solved my problem at least for now. I've changed SOCK_STREAM to
SOCK_RAW and the connections were accepted.

--=20
Rui Silva
Powered by Gentoo Linux under :
CELERON 1000 - Stage1 install with nptl
Pentium M 1800GHz - Stage1 install with NPTL

http://rukinhas.no-ip.org


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