Editing SimTX API/Packets/ClientHello (section)

== Rules ==
* Send it within 5 seconds of connecting, together with the preface.
* The hello frame may be at most 64 KiB. Before the hello the server skips at most 16 unknown or empty frames, and gives up 20 seconds after connecting.
* The role cannot change later on the same connection.
* <code>credential</code> carries the ticket when <code>auth</code> is <code>AUTH_KIND_GAME_TICKET</code>. An anonymous hello must leave it empty; one that carries a credential is refused. A ticket is valid for one connection, 60 seconds, one server and one role. See [[SimTX API/Game tickets|Game tickets]].
* Send <code>features: "stations.v1"</code> if the client handles station-bound sessions and [[SimTX API/Data types#BoundStation|BoundStation]], and <code>protocol_revision: 1</code> if it handles <code>SessionStatus UPDATED</code> with <code>update_reason</code> and station snapshots. See [[SimTX API/Compatibility and versioning|Compatibility and versioning]].