BlueTooth Profile Driver, Windows reserved PSMs range

Question

I have implemented a BT Profile KDMF to simulate a BT HID Keyboard with my desktop machine ( desktop simulates a device ).
I am trying to control an Android device, The Android device is paired with my desktop and lists the virtual BT keyboard under the list of available devices, however, when the Android device is trying to connect to the virtual KeyBoard ( implemented
by my Profile KDMF ) connection is failing with a time out error.
As others in the forums
state, The HID PSMs are
reserved for OS usage ( although they are not really used by the OS... ).
The HID
SDP ( Service Discovery Protocol ) I submit refer to the two custom PSMs I have registered ( with a value higher than the reserved range of 0x0000..0x1000 ).
My guess is that although my SDP specifically refer to the custom SDPs I have registered, the Android device is trying to initiate a L2CAP connection on 0x11 ( Interrupt ) and 0x13 ( Control ) PSMs that are
reserved for OS use ( and are not registered by my driver )
Is there any way to go around this limitation?
It is possible to implement a LowerFilter between bthenum.sys and the BTH Bus controller and/or bthport.sys to re-route/re-name Incoming L2CAP connections with HID PSMs to my registered ( non HID ) PSMs ?
Can BthEnum be replaced with a custom driver? one that will publish only a set of designated services ?
Nadav Rubinstein, See my Blog @
http://www.sophin.com

Answer 1

Dear Nadav,
When i try to regsiter PSM 0x11 it gives me STATUS_INVALID_PARAMETER error (0xc000000d).
But what i think is if PSM 0x11 is already regsitered then i should get STATUS_ALREADY_COMMITED error(oxc0000021)?
Below mentioned is the code snippet where iam trying to register PSM 0x11 in Bluetooth Profile driver.
DevCtx->Header.ProfileDrvInterface.BthReuseBrb(
        &(DevCtx->RegisterUnregisterBrb), 
        BRB_REGISTER_PSM
    brb = (struct _BRB_PSM *)
            &(DevCtx->RegisterUnregisterBrb);
brb->Psm = 0x11;
    status = BthEchoSharedSendBrbSynchronously(
        DevCtx->Header.IoTarget,
        DevCtx->Header.Request,
        (PBRB) brb,
        sizeof(*brb)
    if (!NT_SUCCESS(status))
        TraceEvents(TRACE_LEVEL_ERROR, DBG_PNP, 
            "BRB_REGISTER_PSM failed, Status code %!STATUS!\n", status);
        goto exit;