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vici: Increase vici message length header from 16 to 32 bits

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While we currently have no need for messages larger than 65KB, we should design
the protocol to be future-proof, as we plan to keep at least to lowest protocol
layer stable.

To avoid any allocation issues, we currently keep the message size limit at
512KB.
This commit is contained in:
Martin Willi
2014-05-07 14:13:38 +02:00
parent 7dbf9e1574
commit 3a9a46c20f
5 changed files with 43 additions and 24 deletions
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src/libcharon/plugins/vici/README.md
+4 -4
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@@ -14,10 +14,10 @@ A client connects to this service to access functionality. It may send an
arbitrary number of packets over the connection before closing it.
To exchange data, the transport protocol is segmented into byte sequences.
Each byte sequence is prefixed by a 16-bit length header in network order,
followed by the data. The maximum segment length is 65535 bytes, and the length
field contains the length of the data only, not including the length field
itself.
Each byte sequence is prefixed by a 32-bit length header in network order,
followed by the data. The maximum segment length is currently limited to 512KB
of data, and the length field contains the length of the data only, not
including the length field itself.
The order of byte sequences must be strict, byte sequences must arrive in the
same order as sent.