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authorAnders Svensson <[email protected]>2015-02-12 11:18:52 +0100
committerAnders Svensson <[email protected]>2015-03-23 15:27:37 +0100
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Strip potentially large terms when sending outgoing Diameter messages
Both incoming and outgoing Diameter messages pass through two or three processes, depending on whether they're incoming or outgoing: the transport process and corresponding peer_fsm process and (for incoming) watchdog processes. Since terms other than binary are copied when passing process boundaries, large terms lead to copying that can be problematic, if frequent enough. Since only the bin and transport_data fields of a diameter_packet record are needed by the transport process, discard others when sending outgoing messages. Strictly speaking, the statement that only the aforementioned fields are needed by the transport process depends on the transport process. It's true of those implemented by diameter (in diameter_tcp and diameter_sctp), but an implementation that makes use of other fields is assuming more than the documentation in diameter_transport(3) promises.
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