>My client and server has two threads each: a reader thread and a writer
thread.
>I have put the renegotiation code in the reader thread. It works for most
>of the time but occasionally the client gets an "Encrypted Alert" message
>( I suspect that this happens when the application data somehow gets
in-between).
>How can I do renegotiation if both my client and server communicate on a
duplex
>channel with reader and writer threads?
I'm not sure what you mean by "reader" and "writer", but if you mean
that
both threads call OpenSSL functions, you will need to associate a mutex with
each connection to ensure that the reader thread and writer thread are not
trying to manipulate that SSL connection at the same time.
Unlike a TCP connection as presented by the kernel to user space, an SSL
connection is *NOT* two independent directions. It is a single state
machine.
DS
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