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         struct in6_addr         prefix;
  13         __be32                  relay_prefix;
  14         u16                     prefixlen;
  15         u16                     relay_prefixlen;
  16 };
  17
  18 struct ip_tunnel {
  19         struct ip_tunnel        *next;
  20         struct net_device       *dev;
  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         /* for SIT */
  34 #ifdef CONFIG_IPV6_SIT_6RD
  35         struct ip_tunnel_6rd_parm       ip6rd;
  36 #endif
  37         struct ip_tunnel_prl_entry      *prl;           /* potential router list */
  38         unsigned int                    prl_count;      /* # of entries in PRL */
  39 };
  40
  41 struct ip_tunnel_prl_entry {
  42         struct ip_tunnel_prl_entry      *next;
  43         __be32                          addr;
  44         u16                             flags;
  45         struct rcu_head                 rcu_head;
  46 };
  47
  48 #define IPTUNNEL_XMIT() do {                                            \
  49         int err;                                                        \
  50         int pkt_len = skb->len - skb_transport_offset(skb);             \
  51                                                                         \
  52         skb->ip_summed = CHECKSUM_NONE;                                 \
  53         ip_select_ident(iph, &rt->u.dst, NULL);                         \
  54                                                                         \
  55         err = ip_local_out(skb);                                        \
  56         if (likely(net_xmit_eval(err) == 0)) {                          \
  57                 txq->tx_bytes += pkt_len;                               \
  58                 txq->tx_packets++;                                      \
  59         } else {                                                        \
  60                 stats->tx_errors++;                                     \
  61                 stats->tx_aborted_errors++;                             \
  62         }                                                               \
  63 } while (0)
  64
  65 #endif