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.\" $OpenBSD: SSL_state_string.3,v 1.2 2016/12/04 12:20:54 schwarze Exp $
.\" OpenSSL b97fdb57 Nov 11 09:33:09 2016 +0100
.\"
.\" This file was written by Lutz Jaenicke <jaenicke@openssl.org>.
.\" Copyright (c) 2001, 2005 The OpenSSL Project. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\"
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\"
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in
.\" the documentation and/or other materials provided with the
.\" distribution.
.\"
.\" 3. All advertising materials mentioning features or use of this
.\" software must display the following acknowledgment:
.\" "This product includes software developed by the OpenSSL Project
.\" for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
.\"
.\" 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
.\" endorse or promote products derived from this software without
.\" prior written permission. For written permission, please contact
.\" openssl-core@openssl.org.
.\"
.\" 5. Products derived from this software may not be called "OpenSSL"
.\" nor may "OpenSSL" appear in their names without prior written
.\" permission of the OpenSSL Project.
.\"
.\" 6. Redistributions of any form whatsoever must retain the following
.\" acknowledgment:
.\" "This product includes software developed by the OpenSSL Project
.\" for use in the OpenSSL Toolkit (http://www.openssl.org/)"
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
.\" EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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.\"
.Dd $Mdocdate: December 4 2016 $
.Dt SSL_STATE_STRING 3
.Os
.Sh NAME
.Nm SSL_state_string ,
.Nm SSL_state_string_long
.Nd get textual description of state of an SSL object
.Sh SYNOPSIS
.In openssl/ssl.h
.Ft const char *
.Fn SSL_state_string "const SSL *ssl"
.Ft const char *
.Fn SSL_state_string_long "const SSL *ssl"
.Sh DESCRIPTION
.Fn SSL_state_string
returns a 6 letter string indicating the current state of the
.Vt SSL
object
.Fa ssl .
.Pp
.Fn SSL_state_string_long
returns a string indicating the current state of the
.Vt SSL
object
.Fa ssl .
.Pp
During its use, an
.Vt SSL
object passes several states.
The state is internally maintained.
Querying the state information is not very informative before or when a
connection has been established.
It however can be of significant interest during the handshake.
.Pp
When using non-blocking sockets,
the function call performing the handshake may return with
.Dv SSL_ERROR_WANT_READ
or
.Dv SSL_ERROR_WANT_WRITE
condition, so that
.Fn SSL_state_string[_long]
may be called.
.Pp
For both blocking or non-blocking sockets,
the details state information can be used within the
.Fn info_callback
function set with the
.Xr SSL_set_info_callback 3
call.
.Sh RETURN VALUES
Detailed description of possible states to be included later.
.Sh SEE ALSO
.Xr ssl 3 ,
.Xr SSL_CTX_set_info_callback 3
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