[TCP/DCCP]: Introduce net_xmit_eval
[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
6 /* Keep error state on tunnel for 30 sec */
7 #define IPTUNNEL_ERR_TIMEO      (30*HZ)
8
9 struct ip_tunnel
10 {
11         struct ip_tunnel        *next;
12         struct net_device       *dev;
13         struct net_device_stats stat;
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
28 #define IPTUNNEL_XMIT() do {                                            \
29         int err;                                                        \
30         int pkt_len = skb->len;                                         \
31                                                                         \
32         skb->ip_summed = CHECKSUM_NONE;                                 \
33         iph->tot_len = htons(skb->len);                                 \
34         ip_select_ident(iph, &rt->u.dst, NULL);                         \
35         ip_send_check(iph);                                             \
36                                                                         \
37         err = NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, rt->u.dst.dev, dst_output);\
38         if (net_xmit_eval(err) == 0) {                                  \
39                 stats->tx_bytes += pkt_len;                             \
40                 stats->tx_packets++;                                    \
41         } else {                                                        \
42                 stats->tx_errors++;                                     \
43                 stats->tx_aborted_errors++;                             \
44         }                                                               \
45 } while (0)
46
47
48 extern int      sit_init(void);
49 extern void     sit_cleanup(void);
50
51 #endif