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Programming Distributed Systems with YAMI4

1 Wire Protocol

This appendix describes the wire protocol, which means the binary representation of messages as they are physically transmitted.

The wire protocol has two parts - the serialization format of parameters objects (these are used to send message headers and bodies, but can also be used alone and outside of the messaging context) and the frame header format.

In both cases the following are true:

• words have 32-bits
• byte ordering is little-endian
• all items are aligned to the word boundary and padding (if needed) is added as bytes of value 0 at the end of the item

A.1 Serialization Format

A.2 Frame Format