/*
 * Copyright (c) 2007-2011 Nicira Networks.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA
 */

#ifndef COMPAT_H
#define COMPAT_H 1

#include <linux/netlink.h>

#ifndef HAVE_NLA_NUL_STRING
static inline int CHECK_NUL_STRING(struct nlattr *attr, int maxlen)
{
	char *s;
	int len;
	if (!attr)
		return 0;

	len = nla_len(attr);
	if (len >= maxlen)
		return -EINVAL;

	s = nla_data(attr);
	if (s[len - 1] != '\0')
		return -EINVAL;

	return 0;
}
#else
static inline int CHECK_NUL_STRING(struct nlattr *attr, int maxlen)
{
	return 0;
}
#endif  /* !HAVE_NLA_NUL_STRING */

static inline void skb_clear_rxhash(struct sk_buff *skb)
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)
	skb->rxhash = 0;
#endif
}

#endif /* compat.h */