Message-ID: <4229B30E.8080803@gmx.ch>
From: Marco Trudel <mtrudel@gmx.ch>
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To: bluez-users@lists.sourceforge.net
Subject: Re: [Bluez-users] adding a sdp service with a 128bit uuid
References: <42291076.5040109@gmx.ch> <1110021688.8058.108.camel@pegasus>
In-Reply-To: <1110021688.8058.108.camel@pegasus>
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Date: Sat, 05 Mar 2005 14:24:30 +0100


Marcel Holtmann wrote:
> Hi Marco,
> 
> 
>>by reading sdptool.c, I was able to write a little program that promotes my 
>>service. Realising this, 3 questions arised:
>>
>>1. general:
>>how to browse the local sdp services?
>>[sdptool browse dev] seems to be only for remote devices. I now always did 
>>it from another device to see the local seervices. how to [sdptool browse 
>>localhost]?
> 
> 
> sdptool browse local

nice :-)
maybe something that should/could be mentioned in the manpage or in --help

>>2. from add_sp(...) in sdptool.c, changing:
>>  # sdp_uuid16_create(&sp_uuid, SERIAL_PORT_SVCLASS_ID);
>>into:
>>  # sdp_uuid128_create(&sp_uuid, a128bitUUID);
>>gives me (if I do [sdptool browse from the other device]):
>>  # Service Class ID List:
>>  #   "Error: This is uuid128" (0x0a333444-5556-6677-7888-9aa99000a1a1)
>>Actually it works well. But why is it saying "Error: ..."? I noticed that 
>>using the avetana jsr82 implementation (that uses bluez), and creating a 
>>sdp entry with a 128bit uuid, it shows the same error.
> 
> 
> This is because the friend display (without --tree) don't understand
> UUID 128 and don't knows how to translate it into a service.

nice again. this solves my proglem that never existed :-)
maybee another thing to mention in the manpage...

>>3. actually this is more a c then a bluez question, but i'd appreciate if 
>>someone could tell it nevertheless:
>>  # sdp_uuid32_create(uuid_t *uuid, uint32_t data);
>>  # sdp_uuid128_create(uuid_t *uuid, const void *data);
>>the second function takes the uuid as "const void *data". What is the 
>>appropriate way to give a uuid like 2c3ef0c843674369b1dfb7315e76332a to 
>>that function?
> 
> 
> Using "unsigned char uuid[16]" and then casting with "(void *)" worked
> for me.

actually, i've a long representation of my uuid. but i'm willing to try!
using 0x233438787A233438787A233438787A23 as long uuid and an ascii table 
gives me: "#48xz#48xz#48xz#" for a char representation of the uuid and it 
works! :-)

but unfortunately that's an invented uuid to avoid control-chars. my uuid 
has values as 0x0F -> that's a SI (left shift) in the ascii table.
so i did:

unsigned char uuid[] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
                          0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10 };

and it works as too. is this what you meant?


thanks a lot for the short and precise answers! it's always a pleasure!

regards
Marco


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