datapath/linux-2.6/compat-2.6/include/net/ipip.h

   1 #ifndef __NET_IPIP_WRAPPER_H
   2 #define __NET_IPIP_WRAPPER_H 1
   3
   4 #include <linux/version.h>
   5
   6 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,32)
   7
   8 #include <linux/if_tunnel.h>
   9 #include <net/ip.h>
  10
  11 /* Keep error state on tunnel for 30 sec */
  12 #define IPTUNNEL_ERR_TIMEO      (30*HZ)
  13
  14 struct ip_tunnel
  15 {
  16         struct ip_tunnel        *next;
  17         struct net_device       *dev;
  18 #ifndef HAVE_NETDEV_STATS
  19         struct net_device_stats stat;
  20 #endif
  21
  22         int                     err_count;      /* Number of arrived ICMP errors */
  23         unsigned long           err_time;       /* Time when the last ICMP error arrived */
  24
  25         /* These four fields used only by GRE */
  26         __u32                   i_seqno;        /* The last seen seqno  */
  27         __u32                   o_seqno;        /* The last output seqno */
  28         int                     hlen;           /* Precalculated GRE header length */
  29         int                     mlink;
  30
  31         struct ip_tunnel_parm   parms;
  32
  33         struct ip_tunnel_prl_entry      *prl;           /* potential router list */
  34         unsigned int                    prl_count;      /* # of entries in PRL */
  35 };
  36
  37 /* ISATAP: default interval between RS in secondy */
  38 #define IPTUNNEL_RS_DEFAULT_DELAY       (900)
  39
  40 struct ip_tunnel_prl_entry
  41 {
  42         struct ip_tunnel_prl_entry      *next;
  43         __be32                          addr;
  44         u16                             flags;
  45         unsigned long                   rs_delay;
  46         struct timer_list               rs_timer;
  47         struct ip_tunnel                *tunnel;
  48         spinlock_t                      lock;
  49 };
  50
  51 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25)
  52 #define IPTUNNEL_XMIT() do {                                            \
  53         int err;                                                        \
  54         int pkt_len = skb->len - skb_transport_offset(skb);             \
  55                                                                         \
  56         skb->ip_summed = CHECKSUM_NONE;                                 \
  57         iph->tot_len = htons(skb->len);                                 \
  58         ip_select_ident(iph, &rt->u.dst, NULL);                         \
  59         ip_send_check(iph);                                             \
  60                                                                         \
  61         err = NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, rt->u.dst.dev, dst_output);\
  62         if (err == NET_XMIT_SUCCESS || err == NET_XMIT_CN) {            \
  63                 stats->tx_bytes += pkt_len;                             \
  64                 stats->tx_packets++;                                    \
  65         } else {                                                        \
  66                 stats->tx_errors++;                                     \
  67                 stats->tx_aborted_errors++;                             \
  68         }                                                               \
  69 } while (0)
  70 #else
  71 #define IPTUNNEL_XMIT() do {                                            \
  72         int err;                                                        \
  73         int pkt_len = skb->len;                                         \
  74                                                                         \
  75         skb->ip_summed = CHECKSUM_NONE;                                 \
  76         ip_select_ident(iph, &rt->u.dst, NULL);                         \
  77                                                                         \
  78         err = ip_local_out(skb);                                        \
  79         if (net_xmit_eval(err) == 0) {                                  \
  80                 stats->tx_bytes += pkt_len;                             \
  81                 stats->tx_packets++;                                    \
  82         } else {                                                        \
  83                 stats->tx_errors++;                                     \
  84                 stats->tx_aborted_errors++;                             \
  85         }                                                               \
  86 } while (0)
  87 #endif
  88
  89 #else
  90 #include_next <net/ipip.h>
  91 #endif /* kernel < 2.6.32 */
  92
  93 #endif /* net/ipip.h wrapper */