Hello Adrian,
With every field optional, and no field to indicate which fields are present how is this parsed?
For example, Do you rely on a Group Data Cipher Suite that starts with octets that couldn’t reasonably be
a Pairwise Cipher Suite count value?
How do you tell the difference between an absent Pairwise Cipher Suite Count and an AKM Suite Count?
See 817.57: "All fields after the Version field are optional. If any
nonzero length field is absent, then none of the subsequent fields is
included."
(The "nonzero length field" thing is a bit confusing, but it's about
the fact that if e.g. the AKM Suite Count is 0 then the length of
the AKM Suite List field is 0.)
See also CID 6332.
Mark
--
Mark RISON, Standards Architect, WLAN English/Esperanto/Français
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From: ***** IEEE stds-802-11-tgm
List ***** [mailto:STDS-802-11-TGM@xxxxxxxx] On Behalf Of Stephens, Adrian P
Sent: 17 June 2015 10:37
To: STDS-802-11-TGM@xxxxxxxxxxxxxxxxx
Subject: [STDS-802-11-TGM] Parsing the RSNE in 802.11
--- This message came from the IEEE 802.11 Task Group M Technical Reflector ---
Dear TGmc folks,
Can you help me with this? Here is the RSNE:
With every field optional, and no field to indicate which fields are present how is this parsed?
For example, Do you rely on a Group Data Cipher Suite that starts with octets that couldn’t reasonably be
a Pairwise Cipher Suite count value?
How do you tell the difference between an absent Pairwise Cipher Suite Count and an AKM Suite Count?
Best Regards,
Adrian P STEPHENS
Tel: +44 (1793) 404825 (office)
Tel: +1 (971) 330 6025 (mobile) ç please note new number
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