当我在 Ubuntu/Bluez 上运行 hciconfig -a 时,我得到以下信息,其中包含一个 8 字节的“功能”行。我如何解码这些字节?也就是what bit代表什么特征?
我特别感兴趣的是数据包长度扩展功能,我认为它由一个字节指示。
$ hciconfig -a
hci0: Type: Primary Bus: USB
BD Address: EC:63:D7:F1:C7:8B ACL MTU: 1021:5 SCO MTU: 96:6
UP RUNNING
RX bytes:7667 acl:0 sco:0 events:297 errors:0
TX bytes:5739 acl:0 sco:0 commands:123 errors:0
Features: 0xff 0xfe 0x0f 0xfe 0xdb 0xff 0x7b 0x87
Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
Link policy: RSWITCH HOLD SNIFF
Link mode: PERIPHERAL ACCEPT
Name: 'linux'
Class: 0x7c0104
Service Classes: Rendering, Capturing, Object Transfer, Audio, Telephony
Device Class: Computer, Desktop workstation
HCI Version: 4.2 (0x8) Revision: 0x1000
LMP Version: 4.2 (0x8) Subversion: 0x1000
Manufacturer: Intel Corp. (2)