76e3ea6e2fe5248b6cb44a2bb9d68ded3b7f4d28
[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 struct ip_tunnel
11 {
12         struct ip_tunnel        *next;
13         struct net_device       *dev;
14
15         int                     err_count;      /* Number of arrived ICMP errors */
16         unsigned long           err_time;       /* Time when the last ICMP error arrived */
17
18         /* These four fields used only by GRE */
19         __u32                   i_seqno;        /* The last seen seqno  */
20         __u32                   o_seqno;        /* The last output seqno */
21         int                     hlen;           /* Precalculated GRE header length */
22         int                     mlink;
23
24         struct ip_tunnel_parm   parms;
25
26         struct ip_tunnel_prl_entry      *prl;           /* potential router list */
27         unsigned int                    prl_count;      /* # of entries in PRL */
28 };
29
30 /* ISATAP: default interval between RS in secondy */
31 #define IPTUNNEL_RS_DEFAULT_DELAY       (900)
32
33 struct ip_tunnel_prl_entry
34 {
35         struct ip_tunnel_prl_entry      *next;
36         __be32                          addr;
37         u16                             flags;
38         unsigned long                   rs_delay;
39         struct timer_list               rs_timer;
40         struct ip_tunnel                *tunnel;
41         spinlock_t                      lock;
42 };
43
44 #define IPTUNNEL_XMIT() do {                                            \
45         int err;                                                        \
46         int pkt_len = skb->len - skb_transport_offset(skb);             \
47                                                                         \
48         skb->ip_summed = CHECKSUM_NONE;                                 \
49         ip_select_ident(iph, &rt->u.dst, NULL);                         \
50                                                                         \
51         err = ip_local_out(skb);                                        \
52         if (net_xmit_eval(err) == 0) {                                  \
53                 stats->tx_bytes += pkt_len;                             \
54                 stats->tx_packets++;                                    \
55         } else {                                                        \
56                 stats->tx_errors++;                                     \
57                 stats->tx_aborted_errors++;                             \
58         }                                                               \
59 } while (0)
60
61 #endif