release/src-rt/linux/linux-2.6/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         struct net_device_stats stat;
  24
  25         int                     recursion;      /* Depth of hard_start_xmit recursion */
  26         int                     err_count;      /* Number of arrived ICMP errors */
  27         unsigned long           err_time;       /* Time when the last ICMP error arrived */
  28
  29         /* These four fields used only by GRE */
  30         __u32                   i_seqno;        /* The last seen seqno  */
  31         __u32                   o_seqno;        /* The last output seqno */
  32         int                     hlen;           /* Precalculated GRE header length */
  33         int                     mlink;
  34
  35         struct ip_tunnel_parm   parms;
  36
  37         /* for SIT */
  38 #ifdef CONFIG_IPV6_SIT_6RD
  39         struct ip_tunnel_6rd_parm       ip6rd;
  40 #endif
  41 };
  42
  43 #define IPTUNNEL_XMIT() do {                                            \
  44         int err;                                                        \
  45         int pkt_len = skb->len;                                         \
  46                                                                         \
  47         skb->ip_summed = CHECKSUM_NONE;                                 \
  48         ip_select_ident(iph, &rt->u.dst, NULL);                         \
  49                                                                         \
  50         err = ip_local_out(skb);                                        \
  51         if (net_xmit_eval(err) == 0) {                                  \
  52                 stats->tx_bytes += pkt_len;                             \
  53                 stats->tx_packets++;                                    \
  54         } else {                                                        \
  55                 stats->tx_errors++;                                     \
  56                 stats->tx_aborted_errors++;                             \
  57         }                                                               \
  58 } while (0)
  59
  60 #endif