$KAME: ipsec_strerror.3,v 1.9 2001/08/17 07:21:36 itojun Exp $
Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE 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. Neither the name of the project nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS 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 PROJECT OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
.Dd May 6, 1998 .Dt IPSEC_STRERROR 3 .Os
.Sh NAME .Nm ipsec_strerror .Nd error messages for the IPsec policy manipulation library
.Sh LIBRARY .Lb libipsec .Sh SYNOPSIS n netinet6/ipsec.h .Ft "const char *" .Fn ipsec_strerror void
.Sh DESCRIPTION
p .Dl extern int ipsec_errcode ;
p which is used to pass an error code from the IPsec policy manipulation library to a program. .Fn ipsec_strerror can be used to obtain the error message string for the error code.
p
The array pointed to is not to be modified by the calling program.
Since
.Fn ipsec_strerror
uses
.Xr strerror 3
as underlying function, calling
.Xr strerror 3
after
.Fn ipsec_strerror
will make the return value from
.Fn ipsec_strerror
invalid or overwritten.
.Sh RETURN VALUES
.Fn ipsec_strerror
always returns a pointer to a C string.
The C string must not be overwritten by the calling program.
.Sh SEE ALSO
.Xr ipsec_set_policy 3
.Sh HISTORY
.Fn ipsec_strerror
first appeared in the WIDE/KAME IPv6 protocol stack kit.
.Sh BUGS
.Fn ipsec_strerror
will return its result which may be overwritten by subsequent calls.
p .Va ipsec_errcode is not thread safe.
