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The Upgrade Request message transports an upgrade request.
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UpgradeId |
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Metadata Length |
EndpointType1 |
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EndpointType1Data Length |
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EndpointType1Data |
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EndpointType2 |
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EndpointType2Data Length |
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EndpointType2Data |
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UpgradeId (16 bytes): A random GUID identifying this upgrade process across transports.
Metadata: Transport-defined data that is size-prefixed for each transport endpoint type (see the following table) available on the device. The overall section is also prefixed with the two-byte Metadata Length field to indicate how many such endpoint type-to-data mappings are present.
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Metadata Length (2 bytes): Section prefix that indicates how many endpoint type-to-data mappings are present.
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Each transport endpoint type available on the device has the following data set.
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EndpointType(n) (2 bytes): An enumeration that defines the type of endpoint defined in the following table.
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Endpoint Type
0
Unknown
1
Udp
2
Tcp
3
Cloud
4
Ble
5
Rfcomm
6
WifiDirect
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EndpointType(n)Data Length (4 bytes): The length of EndpointType(n)Data.
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EndpointType(n)Data (8 bytes): The Endpoint Type data.
If the network type of the device is "Public", CDP will use TTK (Trust Tuple Keyword) field "WFDCDPSvc" from the firewall rule "Connected Devices Platform - Wi-Fi Direct Transport (TCP-In)" to allow traffic over network using TCP protocol.