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Rework section about return values another time (based on hints from
Bodo Moeller).
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@ -83,11 +83,13 @@ bytes actually read from the TLS/SSL connection.
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=item 0
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The read operation was not successful, the SSL connection was closed by the
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peer by sending a "close notify" alert. The SSL_RECEIVED_SHUTDOWN flag in
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the ssl shutdown state is set (see L<SSL_shutdown(3)|SSL_shutdown(3)>,
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L<SSL_set_shutdown(3)|SSL_set_shutdown(3)>).
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Call SSL_get_error() with the return value B<ret> to find out,
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The read operation was not successful. The reason may either be a clean
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shutdown due to a "close notify" alert sent by the peer (in which case
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the SSL_RECEIVED_SHUTDOWN flag in the ssl shutdown state is set
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(see L<SSL_shutdown(3)|SSL_shutdown(3)>,
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L<SSL_set_shutdown(3)|SSL_set_shutdown(3)>). It is also possible, that
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the peer simply shut down the underlying transport and the shutdown is
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incomplete. Call SSL_get_error() with the return value B<ret> to find out,
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whether an error occurred or the connection was shut down cleanly
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(SSL_ERROR_ZERO_RETURN).
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@ -78,12 +78,8 @@ bytes actually written to the TLS/SSL connection.
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=item 0
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The write operation was not successful, because the write side of the
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SSL connection was shut down (the SSL_SENT_SHUTDOWN flag in the shutdown
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state is set) by calling L<SSL_shutdown(3)|SSL_shutdown(3)> or
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L<SSL_set_shutdown(3)|SSL_set_shutdown(3)>. It is also possible, that the
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underlying connection was closed.
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Call SSL_get_error() with the return value B<ret> to find out,
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The write operation was not successful. Probably the underlying connection
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was closed. Call SSL_get_error() with the return value B<ret> to find out,
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whether an error occurred or the connection was shut down cleanly
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(SSL_ERROR_ZERO_RETURN).
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