Bluetooth et Linux
Il existe 3 piles Bluetooth pour Linux !
- BlueZ: from Qualcomm, stack included in Linux kernel since version 2.4.6 (June 2001).
- BlueDrekar: from IBM (July 2000). Not free
- Affix: from Nokia (November 2001).
Utilisation de BlueZ
Détection du dongle Bluetooth USB branché sur le PC
hcitool dev
| BT120 | BT180 |
#hcitool dev
Devices:
hci0 00:0B:0D:20:59:1C
hciconfig -a
#hciconfig -a
hci0: Type: USB
BD Address: 00:0B:0D:20:59:1C ACL MTU: 339:4 SCO MTU: 64:0
UP RUNNING PSCAN ISCAN
RX bytes:101 acl:0 sco:0 events:13 errors:0
TX bytes:300 acl:0 sco:0 commands:13 errors:0
Features: 0xff 0xff 0x3d 0x00 0x00 0x00 0x00 0x00
Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
Link policy: RSWITCH HOLD SNIFF PARK
Link mode: SLAVE ACCEPT
Name: 'debian-0'
Class: 0x000100
Service Classes: Unspecified
Device Class: Computer, Uncategorized
HCI Ver: 1.1 (0x1) HCI Rev: 0x93 LMP Ver: 1.1 (0x1) LMP Subver: 0x93
Manufacturer: Transilica, Inc. (24)
|
#hcitool dev
Devices:
hci0 00:0B:0D:60:88:5D
hciconfig -a
#hciconfig -a
hci0: Type: USB
BD Address: 00:0B:0D:60:88:5D ACL MTU: 377:10 SCO MTU: 16:0
UP RUNNING PSCAN ISCAN
RX bytes:117 acl:0 sco:0 events:15 errors:0
TX bytes:313 acl:0 sco:0 commands:15 errors:0
Features: 0xff 0xfe 0x0d 0x38 0x08 0x08 0x00 0x00
Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
Link policy: RSWITCH HOLD SNIFF PARK
Link mode: SLAVE ACCEPT
Name: 'debian-0'
Class: 0x3e0100
Service Classes: Networking, Rendering, Capturing
Device Class: Computer, Uncategorized
HCI Ver: 1.2 (0x2) HCI Rev: 0x4 LMP Ver: 1.2 (0x2) LMP Subver: 0x309
Manufacturer: Broadcom Corporation (15)
|
Détection du téléphone Bluetooth par le PC
hcitool scan
# hcitool scan
Scanning ...
00:0A:D9:36:9C:87 T68i steph
# hcitool scan
Scanning ...
00:0A:28:35:80:A8 Motorola Phone
(with BT180 I can see my neighbours phones ;-))
# hcitool scan
Scanning ...
00:0E:ED:56:B2:87 Nokia 6230
00:12:62:C2:8B:4B Nokia 6230
00:0A:28:35:80:A8 Motorola Phone Stephane
00:17:E2:24:D3:07 Motorola Razor V3 Stephane
Détection des services Bluetooth disponibles sur les téléphones
| T68i | Motorola V80 | Nokia 6230 | Mototola Razor V3 |
sdptool browse 00:0A:D9:36:9C:87
sdptool browse 00:0A:D9:36:9C:87
Browsing 00:0A:D9:36:9C:87 ...
Service Name: Dial-up Networking
Service RecHandle: 0x10000
Service Class ID List:
"Dialup Networking" (0x1103)
"Generic Networking" (0x1201)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 1
Profile Descriptor List:
"Dialup Networking" (0x1103)
Version: 0x0100
Service Name: Fax
Service RecHandle: 0x10001
Service Class ID List:
"Fax" (0x1111)
"Generic Telephony" (0x1204)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 2
Profile Descriptor List:
"Fax" (0x1111)
Version: 0x0100
Service Name: Voice gateway
Service RecHandle: 0x10002
Service Class ID List:
"Headset Audio Gateway" (0x1112)
"Generic Audio" (0x1203)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 3
Profile Descriptor List:
"Headset" (0x1108)
Version: 0x0100
Service Name: Serial Port 1
Service RecHandle: 0x10003
Service Class ID List:
"Serial Port" (0x1101)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 4
Service Name: Serial Port 2
Service RecHandle: 0x10004
Service Class ID List:
"Serial Port" (0x1101)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 5
Service Name: OBEX Object Push
Service RecHandle: 0x10005
Service Class ID List:
"OBEX Object Push" (0x1105)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 10
"OBEX" (0x0008)
Profile Descriptor List:
"OBEX Object Push" (0x1105)
Version: 0x0100
Service Name: IrMC Synchronization
Service RecHandle: 0x10006
Service Class ID List:
"IrMCSync" (0x1104)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 11
"OBEX" (0x0008)
Profile Descriptor List:
"IrMCSync" (0x1104)
Version: 0x0100
Service Name: Voice gateway
Service RecHandle: 0x1000f
Service Class ID List:
"" (0x111f)
"Generic Audio" (0x1203)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 6
Profile Descriptor List:
"" (0x111e)
Version: 0x0100
|
sdptool browse 00:0A:28:35:80:A8
sdptool browse 00:0A:28:35:80:A8
Browsing 00:0A:28:35:80:A8 ...
Service RecHandle: 0x0
Service Class ID List:
"SDP Server" (0x1000)
Protocol Descriptor List:
"L2CAP" (0x0100)
"SDP" (0x0001)
Profile Descriptor List:
"" (0x1000)
Version: 0x0100
Service Name: Dial-up networking Gateway
Service Description: Dial-up networking Gateway
Service Provider: Motorola
Service RecHandle: 0x10001
Service Class ID List:
"Dialup Networking" (0x1103)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 1
Language Base Attr List:
code_ISO639: 0x656e
encoding: 0x6a
base_offset: 0x100
code_ISO639: 0x6672
encoding: 0x6a
base_offset: 0xd800
code_ISO639: 0x6465
encoding: 0x6a
base_offset: 0xd803
code_ISO639: 0x6974
encoding: 0x6a
base_offset: 0xd806
code_ISO639: 0x6573
encoding: 0x6a
base_offset: 0xd809
code_ISO639: 0x6e6c
encoding: 0x6a
base_offset: 0xd80c
code_ISO639: 0x7472
encoding: 0x6a
base_offset: 0xd80f
code_ISO639: 0x7074
encoding: 0x6a
base_offset: 0xd812
Profile Descriptor List:
"Dialup Networking" (0x1103)
Version: 0x0100
Service Name: Voice Gateway
Service Description: Headset Audio Gateway
Service Provider: Motorola
Service RecHandle: 0x10003
Service Class ID List:
"Headset Audio Gateway" (0x1112)
"Generic Audio" (0x1203)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 3
Language Base Attr List:
code_ISO639: 0x656e
encoding: 0x6a
base_offset: 0x100
code_ISO639: 0x6672
encoding: 0x6a
base_offset: 0xd800
code_ISO639: 0x6465
encoding: 0x6a
base_offset: 0xd803
code_ISO639: 0x6974
encoding: 0x6a
base_offset: 0xd806
code_ISO639: 0x6573
encoding: 0x6a
base_offset: 0xd809
code_ISO639: 0x6e6c
encoding: 0x6a
base_offset: 0xd80c
code_ISO639: 0x7472
encoding: 0x6a
base_offset: 0xd80f
code_ISO639: 0x7074
encoding: 0x6a
base_offset: 0xd812
Profile Descriptor List:
"Headset" (0x1108)
Version: 0x0100
Service Name: Hands-Free voice gateway
Service Description: Hands-Free voice gateway
Service Provider: Motorola
Service RecHandle: 0x10007
Service Class ID List:
"" (0x111f)
"Generic Audio" (0x1203)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 7
Language Base Attr List:
code_ISO639: 0x656e
encoding: 0x6a
base_offset: 0x100
code_ISO639: 0x6672
encoding: 0x6a
base_offset: 0xd800
code_ISO639: 0x6465
encoding: 0x6a
base_offset: 0xd803
code_ISO639: 0x6974
encoding: 0x6a
base_offset: 0xd806
code_ISO639: 0x6573
encoding: 0x6a
base_offset: 0xd809
code_ISO639: 0x6e6c
encoding: 0x6a
base_offset: 0xd80c
code_ISO639: 0x7472
encoding: 0x6a
base_offset: 0xd80f
code_ISO639: 0x7074
encoding: 0x6a
base_offset: 0xd812
Profile Descriptor List:
"" (0x111e)
Version: 0x0101
Service Name: OBEX Object Push
Service Description: OBEX Object Push
Service Provider: Motorola
Service RecHandle: 0x10008
Service Class ID List:
"OBEX Object Push" (0x1105)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 8
"OBEX" (0x0008)
Language Base Attr List:
code_ISO639: 0x656e
encoding: 0x6a
base_offset: 0x100
code_ISO639: 0x6672
encoding: 0x6a
base_offset: 0xd800
code_ISO639: 0x6465
encoding: 0x6a
base_offset: 0xd803
code_ISO639: 0x6974
encoding: 0x6a
base_offset: 0xd806
code_ISO639: 0x6573
encoding: 0x6a
base_offset: 0xd809
code_ISO639: 0x6e6c
encoding: 0x6a
base_offset: 0xd80c
code_ISO639: 0x7472
encoding: 0x6a
base_offset: 0xd80f
code_ISO639: 0x7074
encoding: 0x6a
base_offset: 0xd812
Profile Descriptor List:
"OBEX Object Push" (0x1105)
Version: 0x0100
Service Name: OBEX file transfer
Service Description: OBEX file transfer
Service Provider: Motorola
Service RecHandle: 0x10009
Service Class ID List:
"OBEX File Transfer" (0x1106)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 9
"OBEX" (0x0008)
Language Base Attr List:
code_ISO639: 0x656e
encoding: 0x6a
base_offset: 0x100
code_ISO639: 0x6672
encoding: 0x6a
base_offset: 0xd800
code_ISO639: 0x6465
encoding: 0x6a
base_offset: 0xd803
code_ISO639: 0x6974
encoding: 0x6a
base_offset: 0xd806
code_ISO639: 0x6573
encoding: 0x6a
base_offset: 0xd809
code_ISO639: 0x6e6c
encoding: 0x6a
base_offset: 0xd80c
code_ISO639: 0x7472
encoding: 0x6a
base_offset: 0xd80f
code_ISO639: 0x7074
encoding: 0x6a
base_offset: 0xd812
Profile Descriptor List:
"OBEX File Transfer" (0x1106)
Version: 0x0100
|
sdptool browse 00:0E:ED:56:B2:87
sdptool browse 00:0E:ED:56:B2:87
Browsing 00:0E:ED:56:B2:87 ...
Service Name: OBEX Object Push
Service RecHandle: 0x10000
Service Class ID List:
"OBEX Object Push" (0x1105)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 9
"OBEX" (0x0008)
Language Base Attr List:
code_ISO639: 0x656e
encoding: 0x6a
base_offset: 0x100
Profile Descriptor List:
"OBEX Object Push" (0x1105)
Version: 0x0100
Service Name: OBEX File Transfer
Service RecHandle: 0x10001
Service Class ID List:
"OBEX File Transfer" (0x1106)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 10
"OBEX" (0x0008)
Language Base Attr List:
code_ISO639: 0x656e
encoding: 0x6a
base_offset: 0x100
Profile Descriptor List:
"OBEX File Transfer" (0x1106)
Version: 0x0100
Service Name: Dial-up networking
Service RecHandle: 0x10002
Service Class ID List:
"Dialup Networking" (0x1103)
"Generic Networking" (0x1201)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 1
Language Base Attr List:
code_ISO639: 0x656e
encoding: 0x6a
base_offset: 0x100
Profile Descriptor List:
"Dialup Networking" (0x1103)
Version: 0x0100
Service Name: Nokia PC Suite
Service RecHandle: 0x10003
Service Class ID List:
"Serial Port" (0x1101)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 15
Language Base Attr List:
code_ISO639: 0x656e
encoding: 0x6a
base_offset: 0x100
Service Name: COM 1
Service RecHandle: 0x10004
Service Class ID List:
"Serial Port" (0x1101)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 3
Language Base Attr List:
code_ISO639: 0x656e
encoding: 0x6a
base_offset: 0x100
Service Name: Voice Gateway
Service RecHandle: 0x10005
Service Class ID List:
"Handfree Audio Gateway" (0x111f)
"Generic Audio" (0x1203)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 13
Language Base Attr List:
code_ISO639: 0x656e
encoding: 0x6a
base_offset: 0x100
Profile Descriptor List:
"Handsfree" (0x111e)
Version: 0x0101
Service Name: Audio Gateway
Service RecHandle: 0x10006
Service Class ID List:
"Headset Audio Gateway" (0x1112)
"Generic Audio" (0x1203)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 12
Language Base Attr List:
code_ISO639: 0x656e
encoding: 0x6a
base_offset: 0x100
Profile Descriptor List:
"Headset" (0x1108)
Version: 0x0100
Service Name: SIM ACCESS
Service RecHandle: 0x1000c
Service Class ID List:
"SIM Access" (0x112d)
"Generic Telephony" (0x1204)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 4
Language Base Attr List:
code_ISO639: 0x656e
encoding: 0x6a
base_offset: 0x100
Profile Descriptor List:
"SIM Access" (0x112d)
Version: 0x0100
|
sdptool browse 00:0A:D9:36:9C:87
Browsing 00:17:E2:24:D3:07 ...
Service RecHandle: 0x0
Service Class ID List:
"SDP Server" (0x1000)
Protocol Descriptor List:
"L2CAP" (0x0100)
"SDP" (0x0001)
Profile Descriptor List:
"SDP Server" (0x1000)
Version: 0x0100
Service Name: Dial-up Networking Gateway
Service Description: Dial-up Networking Gateway
Service Provider: /a/mobile/system/cl.gif
Service RecHandle: 0x10001
Service Class ID List:
"Dialup Networking" (0x1103)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 1
Language Base Attr List:
code_ISO639: 0x656e
encoding: 0x6a
base_offset: 0x100
code_ISO639: 0x6672
encoding: 0x6a
base_offset: 0xc800
code_ISO639: 0x6465
encoding: 0x6a
base_offset: 0xc803
code_ISO639: 0x6974
encoding: 0x6a
base_offset: 0xc806
code_ISO639: 0x6573
encoding: 0x6a
base_offset: 0xc809
code_ISO639: 0x6e6c
encoding: 0x6a
base_offset: 0xc80c
code_ISO639: 0x7472
encoding: 0x6a
base_offset: 0xc80f
code_ISO639: 0x7074
encoding: 0x6a
base_offset: 0xc812
Profile Descriptor List:
"Dialup Networking" (0x1103)
Version: 0x0100
Service Name: Voice Gateway
Service Description: Headset Audio Gateway
Service Provider: /a/mobile/system/cl.gif
Service RecHandle: 0x10003
Service Class ID List:
"Headset Audio Gateway" (0x1112)
"Generic Audio" (0x1203)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 3
Language Base Attr List:
code_ISO639: 0x656e
encoding: 0x6a
base_offset: 0x100
code_ISO639: 0x6672
encoding: 0x6a
base_offset: 0xc800
code_ISO639: 0x6465
encoding: 0x6a
base_offset: 0xc803
code_ISO639: 0x6974
encoding: 0x6a
base_offset: 0xc806
code_ISO639: 0x6573
encoding: 0x6a
base_offset: 0xc809
code_ISO639: 0x6e6c
encoding: 0x6a
base_offset: 0xc80c
code_ISO639: 0x7472
encoding: 0x6a
base_offset: 0xc80f
code_ISO639: 0x7074
encoding: 0x6a
base_offset: 0xc812
Profile Descriptor List:
"Headset" (0x1108)
Version: 0x0100
Service Name: Handsfree Voice Gateway
Service Description: Handsfree Voice Gateway
Service Provider: /a/mobile/system/cl.gif
Service RecHandle: 0x10007
Service Class ID List:
"Handfree Audio Gateway" (0x111f)
"Generic Audio" (0x1203)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 7
Language Base Attr List:
code_ISO639: 0x656e
encoding: 0x6a
base_offset: 0x100
code_ISO639: 0x6672
encoding: 0x6a
base_offset: 0xc800
code_ISO639: 0x6465
encoding: 0x6a
base_offset: 0xc803
code_ISO639: 0x6974
encoding: 0x6a
base_offset: 0xc806
code_ISO639: 0x6573
encoding: 0x6a
base_offset: 0xc809
code_ISO639: 0x6e6c
encoding: 0x6a
base_offset: 0xc80c
code_ISO639: 0x7472
encoding: 0x6a
base_offset: 0xc80f
code_ISO639: 0x7074
encoding: 0x6a
base_offset: 0xc812
Profile Descriptor List:
"Handsfree" (0x111e)
Version: 0x0101
Service Name: OBEX Object Push
Service Description: OBEX Object Push
Service Provider: /a/mobile/system/cl.gif
Service RecHandle: 0x10008
Service Class ID List:
"OBEX Object Push" (0x1105)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 8
"OBEX" (0x0008)
Language Base Attr List:
code_ISO639: 0x656e
encoding: 0x6a
base_offset: 0x100
code_ISO639: 0x6672
encoding: 0x6a
base_offset: 0xc800
code_ISO639: 0x6465
encoding: 0x6a
base_offset: 0xc803
code_ISO639: 0x6974
encoding: 0x6a
base_offset: 0xc806
code_ISO639: 0x6573
encoding: 0x6a
base_offset: 0xc809
code_ISO639: 0x6e6c
encoding: 0x6a
base_offset: 0xc80c
code_ISO639: 0x7472
encoding: 0x6a
base_offset: 0xc80f
code_ISO639: 0x7074
encoding: 0x6a
base_offset: 0xc812
Profile Descriptor List:
"OBEX Object Push" (0x1105)
Version: 0x0100
Service Name: OBEX file transfer
Service Description: OBEX file transfer
Service Provider: /a/mobile/system/cl.gif
Service RecHandle: 0x10009
Service Class ID List:
"OBEX File Transfer" (0x1106)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 9
"OBEX" (0x0008)
Language Base Attr List:
code_ISO639: 0x656e
encoding: 0x6a
base_offset: 0x100
code_ISO639: 0x6672
encoding: 0x6a
base_offset: 0xc800
code_ISO639: 0x6465
encoding: 0x6a
base_offset: 0xc803
code_ISO639: 0x6974
encoding: 0x6a
base_offset: 0xc806
code_ISO639: 0x6573
encoding: 0x6a
base_offset: 0xc809
code_ISO639: 0x6e6c
encoding: 0x6a
base_offset: 0xc80c
code_ISO639: 0x7472
encoding: 0x6a
base_offset: 0xc80f
code_ISO639: 0x7074
encoding: 0x6a
base_offset: 0xc812
Profile Descriptor List:
"OBEX File Transfer" (0x1106)
Version: 0x0100
Service Name: Image Push
Service Description: Image Push
Service Provider: /a/mobile/system/cl.gif
Service RecHandle: 0x1000a
Service Class ID List:
"Imaging Responder" (0x111b)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 10
"OBEX" (0x0008)
Language Base Attr List:
code_ISO639: 0x656e
encoding: 0x6a
base_offset: 0x100
code_ISO639: 0x6672
encoding: 0x6a
base_offset: 0xc800
code_ISO639: 0x6465
encoding: 0x6a
base_offset: 0xc803
code_ISO639: 0x6974
encoding: 0x6a
base_offset: 0xc806
code_ISO639: 0x6573
encoding: 0x6a
base_offset: 0xc809
code_ISO639: 0x6e6c
encoding: 0x6a
base_offset: 0xc80c
code_ISO639: 0x7472
encoding: 0x6a
base_offset: 0xc80f
code_ISO639: 0x7074
encoding: 0x6a
base_offset: 0xc812
Profile Descriptor List:
"Imaging" (0x111a)
Version: 0x0100
|
Utiliser les services du telephone Motorola
On constate que le channel OBEX Object Push est 8.
On constate que le channel OBEX File Transfer est 9.
#sdptool add --channel=8 OPUSH
#sdptool add --channel=9 FTRN
Transfert de fichiers : Moto vers PC
#obexserver
Les fichiers recus seront dans /tmp. Ca ne marche pas chez moi.
Transfert de fichiers : PC vers Moto
rfcomm connect 0 00:0A:28:35:80:A8 8
ussp-push /dev/rfcomm0 /home/stephane/toto.mp3 super.mp3
Et ça marche (40 minutes pour un mp3 de 4 Mo) !
Ca va vite au debut, mais ensuite le telephone se met en veille et ça rame !
Programmes pour Linux
PAN
Server side
# pand --master --listen role GN
# ifconfig bnep0 192.168.0.1
Client Side
# pand --connect 00:11:22:33:44:55 #SERVER ADDR
# ifconfig bnep0 192.168.0.2
# route add default gw 192.168.0.1
Ligne de commande interressante
arecord -B 1000000 -D plughw:Headset - | aplay
Pour convertir un mp3 en mono (ça prend moins de place sur le téléphone ;-))
lame -a input.mp3 output.mp3
Glossaire
- A2DP: Advanced Audio Distribution Profile
- AVDTP: Audio Video Distribution Protocol
- AVRCP: Audio Video Remote Control Profile
- BCSP : BlueCore Serial Protocol
- BNEP : Bluetooth Network Encapsulation Protocol
- CAPI : Common ISDN API
- CMTP : CAPI Message Transport Protocol
- HCI : Host Controler Interface
- HID : Human Interface Device
- ISCAN : Inquiry Scan
- ISDN : equivalent to RNIS in France
- L2CAP : Logical Link Control and Adaptation Protocol
- OBEX : OBject EXchange
- PAN : Personal Area Network (pand program)
- PIM : Personal Information Management
- PSCAN : Page Scan
- RFCOMM : Serial Port (pppd, chat dund program)
- SCO : Audio Port (btsco, a2play, sbcenc)
- SDP : Service Discovery Protocol
