.\"	$NetBSD: ipsec_strerror.3,v 1.10 2006/09/09 16:22:09 manu Exp $
.\"
.\"	$KAME: ipsec_strerror.3,v 1.9 2001/08/17 07:21:36 itojun Exp $
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.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
.In netinet6/ipsec.h
.Ft "const char *"
.Fn ipsec_strerror void
.\"
.Sh DESCRIPTION
.Pa netinet6/ipsec.h
declares
.Pp
.Dl extern int ipsec_errcode ;
.Pp
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.
.Pp
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.
.Pp
.Va ipsec_errcode
is not thread safe.