Difference between revisions of "Ondemand Protocol"
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− | The 'Ondemand' protocol is used to stream updates to the cache. The client knows which files to update from the CRC | + | The 'Ondemand' protocol is used to stream updates to the cache. The client knows which files to update from the CRC file downloaded using the [[JAGGRAB Protocol|JAGGRAB protocol]]. |
== Request packet == | == Request packet == |
Latest revision as of 16:02, 17 August 2009
The 'Ondemand' protocol is used to stream updates to the cache. The client knows which files to update from the CRC file downloaded using the JAGGRAB protocol.
Request packet
The client first authenticates as an ondemand client by using the opcode '15' (as opposed to the game, which uses the type '14').
The format of the request is:
unsigned byte cacheId; unsigned short fileId; unsigned byte priority;
There can be multiple requests per session.
Response packet
The response is sent in blocks. The maximum size of a block is 500 bytes. Smaller blocks (at the end of a file) are permitted.
Each block has the format:
unsigned byte cacheId; unsigned short fileId; unsigned short fileSize; unsigned byte blockNumber; unsigned byte[] blockData;