[Bluez-users] multiple server-instances on one single machine

[Uli Sesselmann <hans-ulrich.sesselmann@bluecellnetworks.com>]

Hello List,

I'm trying to build a Bluteooth - receiver, which uses multiple 
bluetooth-devices and has a server running for each stick.
(Background is, that i need a machine for testing-purposes to test a 
bluetooth-sender. I need multiple parallel connections to test the 
transferspeed etc.)

I Took the sources of obexpushd 0.4 (debianpackage) and modified them, 
so the obexpushd can be started with -DhciX to use a certain hci device. 
This works perfect, if i start the server on hci2 for example, only hci2 
gets the files. The big problem is, when i start a second instance of 
the obexpushd eg. on hci3, only hci3 gets the content and hci2 not.

I tracked down the problem and can say, that the sdpd promotes the 
OBEX-PUSH Service for each stick and not only for the one i want it to.

I altered  the  obexpush-sdp.c file from

  session = sdp_connect(BDADDR_ANY,BDADDR_LOCAL,SDP_RETRY_IF_BUSY);
  status = sdp_record_register(session,rec,0);

to

  session = sdp_connect(&btdev,BDADDR_LOCAL,SDP_RETRY_IF_BUSY);
  status = sdp_record_register(session,rec,0);

where btdev is the bdaddr_t of the wanted hci-device, but i still get 
all running services promoted on all hci-devices.

example:
i have 4 BT-Sticks attached to my system and run one instance of 
obexpushd on each stick on one own channel (hci-id +1, eg. hci0 on 
channel 1). Now i want to have one independent Server-instance, that is 
promoted by sdpd on this device and can receive data.

when i now use sdptool browse xx:xx:xx:xx:xx:xx, i get the service 
promoted on every device attached.

sdptool browse 0:15:83:B9:ED:DD returns

Browsing 00:15:83:B9:ED:DD ...
Service Name: OBEX Object Push
Service Description: dummy description
Service Provider: obexpushd
Service RecHandle: 0x10000
Service Class ID List:
  "OBEX Object Push" (0x1105)
Protocol Descriptor List:
  "L2CAP" (0x0100)
  "RFCOMM" (0x0003)
    Channel: 1
  "OBEX" (0x0008)
Profile Descriptor List:
  "OBEX Object Push" (0x1105)
    Version: 0x0100

Service Name: OBEX Object Push
Service Description: dummy description
Service Provider: obexpushd
Service RecHandle: 0x10001
Service Class ID List:
  "OBEX Object Push" (0x1105)
Protocol Descriptor List:
  "L2CAP" (0x0100)
  "RFCOMM" (0x0003)
    Channel: 2
  "OBEX" (0x0008)
Profile Descriptor List:
  "OBEX Object Push" (0x1105)
    Version: 0x0100

Service Name: OBEX Object Push
Service Description: dummy description
Service Provider: obexpushd
Service RecHandle: 0x10002
Service Class ID List:
  "OBEX Object Push" (0x1105)
Protocol Descriptor List:
  "L2CAP" (0x0100)
  "RFCOMM" (0x0003)
    Channel: 3
  "OBEX" (0x0008)
Profile Descriptor List:
  "OBEX Object Push" (0x1105)
    Version: 0x0100

Service Name: OBEX Object Push
Service Description: dummy description
Service Provider: obexpushd
Service RecHandle: 0x10003
Service Class ID List:
  "OBEX Object Push" (0x1105)
Protocol Descriptor List:
  "L2CAP" (0x0100)
  "RFCOMM" (0x0003)
    Channel: 4
  "OBEX" (0x0008)
Profile Descriptor List:
  "OBEX Object Push" (0x1105)
    Version: 0x0100


When i start multiple instances, always the last one i started is the 
one that works.


Has anyone a tip for me, how i can manage to get multiple 
server-services on one machine?

greetings,
Uli





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