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