Changes

== StreetPass Exchange ==

== StreetPass Exchange ==

While StreetPass is enabled, the 3DS constantly sends out Probe Requests with an SSID of "Nintendo_3DS_continuous_scan_000". Unlike beacons, which are actively advertising access points, the 3DS is essentially actively looking for other 3DSes. This design is likely to limit impact to non-3DS WiFi capable devices. Each Probe Request contains basic information about that 3DS, including an identifier, and active StreetPass services. If another 3DS is in range, the second 3DS (#2) will respond with a Probe Response, to which the original 3DS (#1), and of the receiving device with every frame thereafter, will respond with an 802.11 Acknowledgement. 3DS(#1) then sends an 802.11 Action frame, as well as an additional Probe Request. The second 3DS sends back another Probe Response that begins the encrypted exchange between the two devices.  

While StreetPass is enabled, the 3DS constantly sends out Probe Requests with an SSID of "Nintendo_3DS_continuous_scan_000". Unlike beacons, which are actively advertising the device's presence, the 3DS is essentially actively looking for other 3DSes. This design is likely to limit impact to non-3DS WiFi capable devices. Each Probe Request contains basic information about that 3DS, including an identifier, and active StreetPass services. If another 3DS is in range, the second 3DS (#2) will respond with a Probe Response, to which the original 3DS (#1), and of the receiving device with every frame thereafter, will respond with an 802.11 Acknowledgement. 3DS(#1) then sends an 802.11 Action frame, as well as an additional Probe Request. The second 3DS sends back another Probe Response that begins the encrypted exchange between the two devices.  

The MAC address used in sleepmode seems to change every time there's a StreetPass hit, as well as the last 8-bytes of the Nintendo tag data. The MAC address + 8-byte ID for StreetPass is seen to change every time the user enters and exits and Settings application if they have not had a StreetPass in an observed time period of 24 hours. It is uncertain how the 3DS determines when it can do a StreetPass again with another 3DS, or what information is actually used to track that. It may be related to how long that 3DS was in range constantly/out of range. 3DSes that are constantly in range of each other in sleepmode, usually do StreetPass every <12 hours?

The MAC address used in sleepmode seems to change every time there's a StreetPass hit, as well as the last 8-bytes of the Nintendo tag data. The MAC address + 8-byte ID for StreetPass is seen to change every time the user enters and exits and Settings application if they have not had a StreetPass in an observed time period of 24 hours. It is uncertain how the 3DS determines when it can do a StreetPass again with another 3DS, or what information is actually used to track that. It may be related to how long that 3DS was in range constantly/out of range. 3DSes that are constantly in range of each other in sleepmode, usually do StreetPass every <12 hours?