b3db2fd6e61cb177be7e70e5f4b57c29ed24812e
[linux-2.6.git] / include / net / ipip.h
1 #ifndef __NET_IPIP_H
2 #define __NET_IPIP_H 1
3
4 #include <linux/if_tunnel.h>
5 #include <net/ip.h>
6
7 /* Keep error state on tunnel for 30 sec */
8 #define IPTUNNEL_ERR_TIMEO      (30*HZ)
9
10 /* 6rd prefix/relay information */
11 struct ip_tunnel_6rd_parm
12 {
13         struct in6_addr         prefix;
14         __be32                  relay_prefix;
15         u16                     prefixlen;
16         u16                     relay_prefixlen;
17 };
18
19 struct ip_tunnel
20 {
21         struct ip_tunnel        *next;
22         struct net_device       *dev;
23
24         int                     err_count;      /* Number of arrived ICMP errors */
25         unsigned long           err_time;       /* Time when the last ICMP error arrived */
26
27         /* These four fields used only by GRE */
28         __u32                   i_seqno;        /* The last seen seqno  */
29         __u32                   o_seqno;        /* The last output seqno */
30         int                     hlen;           /* Precalculated GRE header length */
31         int                     mlink;
32
33         struct ip_tunnel_parm   parms;
34
35         /* for SIT */
36 #ifdef CONFIG_IPV6_SIT_6RD
37         struct ip_tunnel_6rd_parm       ip6rd;
38 #endif
39         struct ip_tunnel_prl_entry      *prl;           /* potential router list */
40         unsigned int                    prl_count;      /* # of entries in PRL */
41 };
42
43 struct ip_tunnel_prl_entry
44 {
45         struct ip_tunnel_prl_entry      *next;
46         __be32                          addr;
47         u16                             flags;
48         struct rcu_head                 rcu_head;
49 };
50
51 #define IPTUNNEL_XMIT() do {                                            \
52         int err;                                                        \
53         int pkt_len = skb->len - skb_transport_offset(skb);             \
54                                                                         \
55         skb->ip_summed = CHECKSUM_NONE;                                 \
56         ip_select_ident(iph, &rt->u.dst, NULL);                         \
57                                                                         \
58         err = ip_local_out(skb);                                        \
59         if (likely(net_xmit_eval(err) == 0)) {                          \
60                 txq->tx_bytes += pkt_len;                               \
61                 txq->tx_packets++;                                      \
62         } else {                                                        \
63                 stats->tx_errors++;                                     \
64                 stats->tx_aborted_errors++;                             \
65         }                                                               \
66 } while (0)
67
68 #endif