SSL_rstate_string() returns a 2 letter string indicating the current read state
of the SSL object ssl.
SSL_rstate_string_long() returns a string indicating the current read state of
the SSL object ssl.
NOTES
When performing a read operation, the SSL/TLS engine must parse the record,
consisting of header and body. When working in a blocking environment,
SSL_rstate_string[_long]() should always return ``RD''/``read done''.
This function should only seldom be needed in applications.
RETURN VALUES
SSL_rstate_string() and SSL_rstate_string_long() can return the following
values:
RH/read header
The header of the record is being evaluated.
RB/read body
The body of the record is being evaluated.
RD/read done
The record has been completely processed.
unknown/unknown
The read state is unknown. This should never happen.
