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/*
* Copyright (c) 2007-2012 Nicira, Inc.
*
* 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/in.h>
#include <linux/in_route.h>
#include <linux/netlink.h>
#include <net/route.h>
#include <net/xfrm.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,13,0)
#define GROUP_ID(grp) 0
#else
#define GROUP_ID(grp) ((grp)->id)
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
#define rt_dst(rt) (rt->dst)
#else
#define rt_dst(rt) (rt->u.dst)
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33)
#define inet_sport(sk) (inet_sk(sk)->sport)
#else
#define inet_sport(sk) (inet_sk(sk)->inet_sport)
#endif
static inline struct rtable *find_route(struct net *net,
__be32 *saddr, __be32 daddr,
u8 ipproto, u8 tos, u32 skb_mark)
{
struct rtable *rt;
/* Tunnel configuration keeps DSCP part of TOS bits, But Linux
* router expect RT_TOS bits only. */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39)
struct flowi fl = { .nl_u = { .ip4_u = {
.daddr = daddr,
.saddr = *saddr,
.tos = RT_TOS(tos) } },
.mark = skb_mark,
.proto = ipproto };
if (unlikely(ip_route_output_key(net, &rt, &fl)))
return ERR_PTR(-EADDRNOTAVAIL);
*saddr = fl.nl_u.ip4_u.saddr;
return rt;
#else
struct flowi4 fl = { .daddr = daddr,
.saddr = *saddr,
.flowi4_tos = RT_TOS(tos),
.flowi4_mark = skb_mark,
.flowi4_proto = ipproto };
rt = ip_route_output_key(net, &fl);
*saddr = fl.saddr;
return rt;
#endif
}
#endif /* compat.h */
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