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freebsd/lib/libipsec/ipsec_strerror.3

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.\" Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
.\" $FreeBSD$
.\" $KAME: ipsec_strerror.3,v 1.6 2000/05/07 05:25:03 itojun Exp $
.\"
.\" All rights reserved.
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.Dd May 6, 1998
.Dt IPSEC_STRERROR 3
.Os
.\"
.Sh NAME
.Nm ipsec_strerror
.Nd error code for IPsec policy manipulation library
.\"
.Sh SYNOPSIS
.Fd #include <netinet6/ipsec.h>
.Ft "char *"
.Fn ipsec_strerror
.\"
.Sh DESCRIPTION
.Pa netinet6/ipsec.h
declares
.Bd -ragged -offset indent
.Vt extern int ipsec_errcode ;
.Ed
.Pp
which is used to pass error code from IPsec policy manipulation library
to user program.
.Fn ipsec_strerror
can be used to obtain error message string for the error code.
.Pp
The array pointed to is not to be modified by the program.
Since
.Fn ipsec_strerror
uses
.Xr strerror 3
as underlying function, calling
.Xr strerror 3
after
.Fn ipsec_strerror
would make the return value from
.Fn ipsec_strerror
invalid, or overwritten.
.\"
.Sh RETURN VALUES
.Fn ipsec_strerror
always return a pointer to C string.
The C string must not be overwritten by user programs.
.\"
.Sh SEE ALSO
.Xr ipsec_set_policy 3
.\"
.Sh HISTORY
The functions first appeared in WIDE/KAME IPv6 protocol stack kit.
.\"
.\" .Sh BUGS
.\" (to be written)