LDN services: Difference between revisions

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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).

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.

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).

Then the Station scans for an [[#ActionFrame]] for loading the [[#NetworkInfo]].

Once connected, the Station must Authenticate with the AccessPoint, this is custom. The Station sends a frame (a maximum of 3 times in some cases if errors occur, with the same data), and the AccessPoint sends a response. Once Authenticated, the node is added to the [[#NodeInfo]] array in [[#NetworkInfo]]. If the Station does not successfully Authenticate X-seconds after connecting, the AccessPoint disconnects the Station. If the Station fails to Authenticate, the Station itself will disconnect as well.

Once connected, the AccessPoint sends Epigram-vendor Action frame(s) (same data) to the Station, the Station doesn't require these frames: <code>dd1afeedfacedeadbeef010000000a00000000000000000000000000</code>. Then the Station must Authenticate with the AccessPoint, this is custom. The Station sends a frame (a maximum of 3 times in some cases if errors occur, with the same data), and the AccessPoint sends a response. Once Authenticated, the node is added to the [[#NodeInfo]] array in [[#NetworkInfo]]. If the Station does not successfully Authenticate X-seconds after connecting, the AccessPoint disconnects the Station. If the Station fails to Authenticate, the Station itself will disconnect as well.

After Authentication the Station will scan for another [[#ActionFrame]], with frame-comparision enabled with the above frame (frame must have been updated since the previous scan). The Station locates the index for a [[#MacAddress]] matching itself in the [[#NetworkInfo]] [[#NodeInfo]] array (the entry for the AccessPoint is skipped), throwing an error if not found. After validating the LocalCommunicationVersion, it proceeds to handle ARP setup below.

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*** 0x0103: ?

* The first byte of Data is value 0, then the ProtocolID-specific data follows, see below.

** ProtocolID 0x0103 frames are sent by the AccessPoint to the Station. This is 0x20-bytes of zeros, except for the first byte which is 0x3. This is sent by the AccessPoint prior to destroying the network?

** ProtocolID 0x0103 frames are sent by the AccessPoint to the Station. This is 0x20-bytes of zeros, except for the first byte which is 0x3. This is sent by the AccessPoint prior to destroying the network.

==== Authentication ====

@@ Line 1,092: / Line 1,092: @@
 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).
-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.
+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).
 Then the Station scans for an [[#ActionFrame]] for loading the [[#NetworkInfo]].
-Once connected, the Station must Authenticate with the AccessPoint, this is custom. The Station sends a frame (a maximum of 3 times in some cases if errors occur, with the same data), and the AccessPoint sends a response. Once Authenticated, the node is added to the [[#NodeInfo]] array in [[#NetworkInfo]]. If the Station does not successfully Authenticate X-seconds after connecting, the AccessPoint disconnects the Station. If the Station fails to Authenticate, the Station itself will disconnect as well.
+Once connected, the AccessPoint sends Epigram-vendor Action frame(s) (same data) to the Station, the Station doesn't require these frames: <code>dd1afeedfacedeadbeef010000000a00000000000000000000000000</code>. Then the Station must Authenticate with the AccessPoint, this is custom. The Station sends a frame (a maximum of 3 times in some cases if errors occur, with the same data), and the AccessPoint sends a response. Once Authenticated, the node is added to the [[#NodeInfo]] array in [[#NetworkInfo]]. If the Station does not successfully Authenticate X-seconds after connecting, the AccessPoint disconnects the Station. If the Station fails to Authenticate, the Station itself will disconnect as well.
 After Authentication the Station will scan for another [[#ActionFrame]], with frame-comparision enabled with the above frame (frame must have been updated since the previous scan). The Station locates the index for a [[#MacAddress]] matching itself in the [[#NetworkInfo]] [[#NodeInfo]] array (the entry for the AccessPoint is skipped), throwing an error if not found. After validating the LocalCommunicationVersion, it proceeds to handle ARP setup below.
@@ Line 1,114: / Line 1,114: @@
 *** 0x0103: ?
 * The first byte of Data is value 0, then the ProtocolID-specific data follows, see below.
-** ProtocolID 0x0103 frames are sent by the AccessPoint to the Station. This is 0x20-bytes of zeros, except for the first byte which is 0x3. This is sent by the AccessPoint prior to destroying the network?
+** ProtocolID 0x0103 frames are sent by the AccessPoint to the Station. This is 0x20-bytes of zeros, except for the first byte which is 0x3. This is sent by the AccessPoint prior to destroying the network.
 ==== Authentication ====