iLink 3 uses Simple Binary Encoding (SBE) optimized for low latency of encoding and decoding while keeping bandwidth utilization reasonably small. All FIX semantics are supported. This encoding standard describes the wire protocol for iLink 3 messages and is complimentary to other FIX standards for session protocol and application-level behavior.
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- An overall message length including headers to support framing.
- An identifier of the encoding used in the message payload. This supports selecting the correct decoder in the case where multiple message encodings are used on a session. It also aids tools such as protocol analyzers to identify message protocols contained in network packets.
| Info |
|---|
The framing standard specifies that the framing header will always be encoded in little-endian byte order. |
Simple Open Framing Header (SOFH) (4 bytes) | SBE Header (8 bytes) | SBE Message (Variable Length) |
|---|---|---|
Message Length: 2 bytes
| Block Length: 2 bytes
| Customer to CME Globex Messages Example:
|
Encoding Type: 2 bytes
| TemplateID: 2 bytes
| CME Globex to Customer Messages Example:
|
SchemaID: 2 bytes
| ||
Version: 2 bytes
|
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<ns2:messageSchema id="8" xsi:schemaLocation="http://www.fixtradingcommunity.org/pg/file/fplpo/read/1196759/simple-binary-encoding-rc2xsd SimpleBinary-RC2.xsd" byteOrder="littleEndian"
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package="iLinkBinary"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns2="http://www.fixprotocol.org/ns/simple/1.0">
Schema Format
The schema file is constructed of several sections including the following:
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