BlueZ-Official Linux Bluetooth protocol stack
Android 4.2之前,Google一直使用的是Linux官方蓝牙协议栈BlueZ。BlueZ实际上是由高通公司在2001年5月基于GPL协议发布的一个开源项目,做为Linux 2.4.6内核的官方蓝牙协议栈。随着Android设备的流行,BlueZ也得到了极大的完善和扩展。例如Android 4.1中BlueZ的版本升级为4.93,它支持蓝牙核心规范4.0,并实现了绝大部分的Profiles。
 

BlueZ provides support for the core Bluetooth layers and protocols. It is flexible, efficient and uses a modular implementation. It has many interesting features:

  • Complete modular implementation
  • Symmetric multi processing safe
  • Multithreaded data processing
  • Support for multiple Bluetooth devices
  • Real hardware abstraction
  • Standard socket interface to all layers
  • Device and service level security support

Currently BlueZ consists of many separate modules:

  • Bluetooth kernel subsystem core
  • L2CAP and SCO audio kernel layers
  • RFCOMM, BNEP, CMTP and HIDP kernel implementations
  • HCI UART, USB, PCMCIA and virtual device drivers
  • General Bluetooth and SDP libraries and daemons
  • Configuration and testing utilities
  • Protocol decoding and analysis tools

The current set of supported profiles is available here.

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