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484 bytes added ,  04:49, 18 October 2020
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= Network protocol =
 
= Network protocol =
 
== ldn ==
 
== ldn ==
A beacon and Action frame are broadcasted. The SSID in the beacon is hidden (32-bytes with value 0). For [[#Scan]]/[[#ScanPrivate]] it doesn't matter if no beacon is available ([[#NetworkInfo]] is the same), as long as the Action frame is broadcasted. However, the Station will not send a probe-request during connection if no beacon is available (and therefore not attempt any communication with the AccessPoint).
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A beacon and Action frame are broadcasted. The SSID in the beacon is hidden (32-bytes with value 0). For [[#Scan]]/[[#ScanPrivate]] it doesn't matter if no beacon is available ([[#NetworkInfo]] is the same), as long as the Action frame is broadcasted. However, the Station will not send a probe-request during connection if no beacon is available (and therefore not attempt any communication with the AccessPoint). The beacon doesn't have any custom Nintendo data, that data is in the Acton frame.
    
During connection, the Station first sends a probe-request using the [[#NetworkInfo|generated]] SSID from the Action frame. If the probe-response contains the expected data for the [[#SecurityConfig]] type, the Station then proceeds to connect to the AccessPoint. The key for data-frames, if [[#SecurityConfig|enabled]], is derived from a buffer containing: {[[#SecurityParameter]]+0x0} followed by {[[#SecurityConfig]] data with the specified data-size}. The [[#ActionFrame]]/data-frame keys are derived with the same func, the only difference is the input passed to this func + the passed constant data. The key derived by ldn is used directly as the static CCMP key for all data-frames (CCMP / MIC is standard).
 
During connection, the Station first sends a probe-request using the [[#NetworkInfo|generated]] SSID from the Action frame. If the probe-response contains the expected data for the [[#SecurityConfig]] type, the Station then proceeds to connect to the AccessPoint. The key for data-frames, if [[#SecurityConfig|enabled]], is derived from a buffer containing: {[[#SecurityParameter]]+0x0} followed by {[[#SecurityConfig]] data with the specified data-size}. The [[#ActionFrame]]/data-frame keys are derived with the same func, the only difference is the input passed to this func + the passed constant data. The key derived by ldn is used directly as the static CCMP key for all data-frames (CCMP / MIC is standard).
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== lp2p ==
 
== lp2p ==
<fill this in>
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This is used for communicating with accessories over local wifi - in particular, [[Mario Kart Live: Home Circuit]] uses this.
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A beacon and Action frame are broadcasted. The SSID in the beacon is hidden (23-bytes with value 0). The MAC address for the BSSID in the beacon matches the source address, while for the Action frame it differs. The beacon contains two custom Nintendo tags with OUI <code>00:22:aa</code>.
    
The DHCP server thread can be started by the "nn.lp2p.StateMachine" thread eventually in certain cases.
 
The DHCP server thread can be started by the "nn.lp2p.StateMachine" thread eventually in certain cases.
    
[[Category:Services]]
 
[[Category:Services]]

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