1. Playing openflow
with stratosphere experimenter
Hiroaki Kawai
<kawai@stratosphere.co.jp>

2. 802.11 frame basic
●
Frame types
▫ Data
●
Encrypted data flows
●
In most use case, we would handle the packets that is
already processed by the netdev.
▫ Control
●
Radio control (like ACK)
●
There seems not many things to do with openflow
●
Management
●
Service management (probe, authentication, etc.)
●
Many things to do.

3. 802.11 management frame
●
Management subtype
●
Association request / response
●
Reassociation request / response
●
Probe request / resposnse
●
Timing Advertisement
●
Beacon
●
Disassociation
●
Authentication / Deauthentication
●
Action / Action No Ack
Match with STROXM_BASIC_DOT11_FRAME_CTRL

4. 802.11 management frame
●
Fixed fields and variable fields.
●
Vraiable fields are named Information element, also
called “tag” in short.
Fixed
Non-IE
Variable
IE
Beacon frame specification, for example
Match with STROXM_BASIC_DOT11_TAG
Citation from IEEE Std 802.11™-2012

5. Action frames
●
There're many services
GAS
Timing measurement
Request
STROXM_BASIC_DOT11_ACTION_CATEGORY
Citation from IEEE Std 802.11™-2012

6. Tips with hostapd
●
hostapd.conf
●
Controls the flow with many bridges
●
bridge, wds_bridge, vlan_bridge
●
Instead of bridges, gopenflow would simplify the flow.

7. Tips with hostapd
●
hostapd.conf
●
Controls the flow with many bridges
●
bridge, wds_bridge, vlan_bridge
●
Instead of bridges, gopenflow would simplify the flow.