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
  24         int                     err_count;      /* Number of arrived ICMP errors */
  25         unsigned long           err_time;       /* Time when the last ICMP error arrived */
  26
  27         /* These four fields used only by GRE */
  28         __u32                   i_seqno;        /* The last seen seqno  */
  29         __u32                   o_seqno;        /* The last output seqno */
  30         int                     hlen;           /* Precalculated GRE header length */
  31         int                     mlink;
  32
  33         struct ip_tunnel_parm   parms;
  34
  35         /* for SIT */
  36 #ifdef CONFIG_IPV6_SIT_6RD
  37         struct ip_tunnel_6rd_parm       ip6rd;
  38 #endif
  39         struct ip_tunnel_prl_entry      *prl;           /* potential router list */
  40         unsigned int                    prl_count;      /* # of entries in PRL */
  41 };
  42
  43 struct ip_tunnel_prl_entry
  44 {
  45         struct ip_tunnel_prl_entry      *next;
  46         __be32                          addr;
  47         u16                             flags;
  48 };
  49
  50 #define IPTUNNEL_XMIT() do {                                            \
  51         int err;                                                        \
  52         int pkt_len = skb->len - skb_transport_offset(skb);             \
  53                                                                         \
  54         skb->ip_summed = CHECKSUM_NONE;                                 \
  55         ip_select_ident(iph, &rt->u.dst, NULL);                         \
  56                                                                         \
  57         err = ip_local_out(skb);                                        \
  58         if (likely(net_xmit_eval(err) == 0)) {                          \
  59                 txq->tx_bytes += pkt_len;                               \
  60                 txq->tx_packets++;                                      \
  61         } else {                                                        \
  62                 stats->tx_errors++;                                     \
  63                 stats->tx_aborted_errors++;                             \
  64         }                                                               \
  65 } while (0)
  66
  67 #endif