Source: ../../fea/kernel_utils.hh

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// -*- c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t -*-

// Copyright (c) 2001-2003 International Computer Science Institute
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software")
// to deal in the Software without restriction, subject to the conditions
// listed in the XORP LICENSE file. These conditions include: you must
// preserve this copyright notice, and you cannot mention the copyright
// holders in advertising related to the Software without their permission.
// The Software is provided WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED. This
// notice is a summary of the XORP LICENSE file; the license in that file is
// legally binding.

// $XORP: xorp/fea/kernel_utils.hh,v 1.1 2003/05/02 07:50:48 pavlin Exp $

#ifndef __FEA_KERNEL_UTILS_HH__
#define __FEA_KERNEL_UTILS_HH__


#include "libxorp/xorp.h"
#include "libxorp/ipvx.hh"


//
// XXX: a hack for KAME, because it encodes the local interface
// index (also the link-local scope_id) in the third and fourth
// octet of an IPv6 address (for LINKLOCAL addresses only).
//
#ifdef HAVE_IPV6
inline IPv6
kernel_ipv6_adjust(const IPv6& ipv6)
{
#ifdef IPV6_STACK_KAME
    in6_addr in6_addr;
    ipv6.copy_out(in6_addr);
    if (IN6_IS_ADDR_LINKLOCAL(&in6_addr)) {
	in6_addr.s6_addr[2] = 0;
	in6_addr.s6_addr[3] = 0;
	return IPv6(in6_addr);
    }
#endif // IPV6_STACK_KAME
    return ipv6;
}
#endif // HAVE_IPV6

inline IPvX
kernel_ipvx_adjust(const IPvX& ipvx)
{
#ifndef HAVE_IPV6
    return ipvx;
#else
    if (! ipvx.is_ipv6())
	return ipvx;
    return (kernel_ipv6_adjust(ipvx.get_ipv6()));
#endif // HAVE_IPV6
}

#endif // __FEA_KERNEL_UTILS_HH__