Jose,
> Jose Antonio Santos Cadenas <santoscadenas@xxxxxxxxx>
> Sent by: linux-bluetooth-owner@xxxxxxxxxxxxxxx
>
> 2011-04-08 15:04
>
> To
>
> Yi Hui Fan/China/IBM@IBMCN
>
> cc
>
> linux-bluetooth@xxxxxxxxxxxxxxx
>
> Subject
>
> Re: HDP, can't read data from fd which Acquire from HealthChannel
>
> Hi,
>
> 2011/4/8 Yi Hui Fan <yihuifan@xxxxxxxxxx>:
> > Dears
> >
> > I'd like to build a demo for HDP sink. I try to use the DBUS API
provided
> > by Bluez. But there is a problem with unix fd to receive data.
> >
> > I can get fd by calling HealthChannel.Acquire method. following is
the
> > code I write to read data according the sock I got.
> >
> > fd_set rfds;
> > struct timeval tv;
> > int rv;
> > char buff[1024];
> >
> > FD_ZERO(&rfds);
> > FD_SET(sock, &rfds);
> > tv.tv_sec = 10;
> > tv.tv_usec = 500;
> >
> > rv = select(sock+1, &rfds, NULL, NULL, &tv);
> >
> > rv = recv(sock, buff, 1024, 0);
> >
> > rv is always return 0 when I call select method. I can't get anything.
> >
> > Any problem with these codes?
>
> It seems that you don't have a valid file descriptor. How are you
> getting the file descriptor? Are you using Dbus 1.4?
>
Yes, I am using Dbus 1.4.
I got the file descriptor by calling Acquire method of HealthChannel. Here
is the code I wrote to get file descriptor.
DBusConnection* conn;
DBusError err;
DBusMessage* msg;
DBusMessage* reply;
DBusMessageIter *iter;
int sock;
dbus_error_init(&err);
printf("start get dbus connection\n");
conn = dbus_bus_get(DBUS_BUS_SYSTEM, &err);
if (dbus_error_is_set(&err)) {
fprintf(stderr, "Connection Error (%s)\n", err.message);
dbus_error_free(&err);
return -1;
}
if((msg = dbus_message_new_method_call("org.bluez", channel_path,
"org.bluez.HealthChannel",
"Acquire"))==NULL)
{
dbus_message_unref(msg);
printf("initial msg failed!");
return -1;
}
reply = dbus_connection_send_with_reply_and_block(conn, msg, -1,
&err);
dbus_message_get_args(reply, &err, DBUS_TYPE_UNIX_FD, &sock,
DBUS_TYPE_INVALID);
dbus_message_unref(msg);
dbus_message_unref(reply);
dbus_connection_unref(conn);
return sock;
>
> >
> > Thanks &
> > Best regards,
>
> Regards
>
> Jose.
>
> >
> > Yihui,Fan
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