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Radiotap

Introduction | defined fields | suggested fields | rejected fields

Flags

Bit Number
1
Structure
u8 flags
Unit
bitmap

Properties of transmitted and received frames.

Currently, the following flags are defined:

Mask Meaning
0x01 sent/received during CFP
0x02 sent/received with short preamble
0x04 sent/received with WEP encryption
0x08 sent/received with fragmentation
0x10 frame includes FCS
0x20 frame has padding between 802.11 header and payload (to 32-bit boundary)
0x40 frame failed FCS check

Currently unspecified but used:

Mask Meaning
0x80 frame used short guard interval (HT)