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| -rw-r--r-- | doc/publican/sources/Protocol.xml | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/doc/publican/sources/Protocol.xml b/doc/publican/sources/Protocol.xml index 97e9ba2..0b27082 100644 --- a/doc/publican/sources/Protocol.xml +++ b/doc/publican/sources/Protocol.xml @@ -194,6 +194,21 @@ </varlistentry> </variablelist> </para> + <para> + The protocol does not specify the exact position of the ancillary data + in the stream, except that the order of file descriptors is the same as + the order of messages and <code>fd</code> arguments within messages on + the wire. + </para> + <para> + In particular, it means that any byte of the stream, even the message + header, may carry the ancillary data with file descriptors. + </para> + <para> + Clients and compositors should queue incoming data until they have + whole messages to process, as file descriptors may arrive earlier + or later than the corresponding data bytes. + </para> </section> <xi:include href="ProtocolInterfaces.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/> <section id="sect-Protocol-Versioning"> |