Emmanuel Lécharny created DIRMINA-1200:
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Summary: Avoid creating useless reception buffers when using TLS
Key: DIRMINA-1200
URL: https://issues.apache.org/jira/browse/DIRMINA-1200
Project: MINA
Issue Type: Improvement
Affects Versions: 2.2.9
Reporter: Emmanuel Lécharny
When receiving big messages (like 64Kb) on a TLS session, we start by reading a
1Kb buffer, which is obviously too small, then we increase the buffer size
(2Kb, then 4Kb, etc up to 64Kb) until we have process the incoming message
fully.
Each of those buffers get ditched after having been copied into the newly
allocated buffer.
So if we transmit a 64Kb message, which will be hold in 5 TLS ApplicationData
TLS messages, we allocate 7 buffers, for a total of 128Kb, when it would have
been enough to allocate a 16Kb message, enough to hold a full TLS packet.
Actually, we would still need to process the first 1Kb message as it contains
the TLS frame with the data size (bytes 4 and 5 in the TLS header), enough
information for the proper buffer allocation.
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