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The Vendor Extension attribute is a WSC information element (IE) structure that is used by a Miracast Sink to publish peer to peer (P2P) attribute structures defined by the Miracast over Infrastructure protocol.
As specified in [WF-WSC2.0.2], the Vendor Extension attribute has the following general format.
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WSCVEA |
Length |
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OUI |
P2PATTB (variable) |
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... |
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WSCVEA (2 bytes): The value is 0x1049 to indicate that this attribute is a WSC vendor extension.
Length (2 bytes): The length of the following fields in bytes.
OUI (3 bytes): A Wi-Fi Protected Setup (WPS) organizationally unique identifier (OUI) [IEEE-OUI]. The value is 0x000137 for messages defined by this specification.
P2PATTB (variable): One or more of the P2P attribute structures defined in the sections that follow. Attributes can be included in any order.