2 * Copyright (c) 2007-2012 Nicira, Inc.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of version 2 of the GNU General Public
6 * License as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
23 #include <linux/in_route.h>
24 #include <linux/netlink.h>
25 #include <net/route.h>
28 #ifdef HAVE_GENL_MULTICAST_GROUP_WITH_ID
29 #define GROUP_ID(grp) ((grp)->id)
31 #define GROUP_ID(grp) 0
34 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
35 #define rt_dst(rt) (rt->dst)
37 #define rt_dst(rt) (rt->u.dst)
40 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33)
41 #define inet_sport(sk) (inet_sk(sk)->sport)
43 #define inet_sport(sk) (inet_sk(sk)->inet_sport)
46 static inline struct rtable *find_route(struct net *net,
47 __be32 *saddr, __be32 daddr,
48 u8 ipproto, u8 tos, u32 skb_mark)
51 /* Tunnel configuration keeps DSCP part of TOS bits, But Linux
52 * router expect RT_TOS bits only.
55 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39)
56 struct flowi fl = { .nl_u = { .ip4_u = {
59 .tos = RT_TOS(tos) } },
63 if (unlikely(ip_route_output_key(net, &rt, &fl)))
64 return ERR_PTR(-EADDRNOTAVAIL);
65 *saddr = fl.nl_u.ip4_u.saddr;
68 struct flowi4 fl = { .daddr = daddr,
70 .flowi4_tos = RT_TOS(tos),
71 .flowi4_mark = skb_mark,
72 .flowi4_proto = ipproto };
74 rt = ip_route_output_key(net, &fl);
80 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
81 static inline bool skb_encapsulation(struct sk_buff *skb)
83 return skb->encapsulation;
86 #define skb_encapsulation(skb) false