2.2.1.1 MESSAGE_HEADER

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Request messages use MESSAGE_HEADER as a common header, which consists of the following fields.


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Version

Type

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Version (2 bytes): The message version, expressed as major and minor values. The version MUST be 1.0 or 2.0.<4>

Note that the order of the subfields is reversed; the MinorVersion subfield occurs first.


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MinorVersion

MajorVersion

MinorVersion (1 byte): The minor part of the version, which MUST be 0x00.

MajorVersion (1 byte): The major part of the version, which MUST be 0x01 or 0x02.<5>

Type (2 bytes): A 16-bit unsigned integer that specifies the message type.

Value

Meaning

0x0001

The message is an INITIAL_OFFER_MESSAGE (section 2.2.1.3).

0x0002

The message is a SEGMENT_INFO_MESSAGE (section 2.2.1.4).

0x0003

The message is a BATCHED_OFFER_MESSAGE (section 2.2.1.5).

Padding (4 bytes): The value of this field is indeterminate and MUST be ignored on processing.