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/gro_cells.h>
   6 #include <net/ip.h>
   7
   8 /* Keep error state on tunnel for 30 sec */
   9 #define IPTUNNEL_ERR_TIMEO      (30*HZ)
  10
  11 /* 6rd prefix/relay information */
  12 struct ip_tunnel_6rd_parm {
  13         struct in6_addr         prefix;
  14         __be32                  relay_prefix;
  15         u16                     prefixlen;
  16         u16                     relay_prefixlen;
  17 };
  18
  19 struct ip_tunnel {
  20         struct ip_tunnel __rcu  *next;
  21         struct net_device       *dev;
  22
  23         int                     err_count;      /* Number of arrived ICMP errors */
  24         unsigned long           err_time;       /* Time when the last ICMP error arrived */
  25
  26         /* These four fields used only by GRE */
  27         __u32                   i_seqno;        /* The last seen seqno  */
  28         __u32                   o_seqno;        /* The last output seqno */
  29         int                     hlen;           /* Precalculated GRE header length */
  30         int                     mlink;
  31
  32         struct ip_tunnel_parm   parms;
  33
  34         /* for SIT */
  35 #ifdef CONFIG_IPV6_SIT_6RD
  36         struct ip_tunnel_6rd_parm       ip6rd;
  37 #endif
  38         struct ip_tunnel_prl_entry __rcu *prl;          /* potential router list */
  39         unsigned int                    prl_count;      /* # of entries in PRL */
  40
  41         struct gro_cells                gro_cells;
  42 };
  43
  44 struct ip_tunnel_prl_entry {
  45         struct ip_tunnel_prl_entry __rcu *next;
  46         __be32                          addr;
  47         u16                             flags;
  48         struct rcu_head                 rcu_head;
  49 };
  50
  51 #define __IPTUNNEL_XMIT(stats1, stats2) do {                            \
  52         int err;                                                        \
  53         int pkt_len = skb->len - skb_transport_offset(skb);             \
  54                                                                         \
  55         skb->ip_summed = CHECKSUM_NONE;                                 \
  56         ip_select_ident(iph, &rt->dst, NULL);                           \
  57                                                                         \
  58         err = ip_local_out(skb);                                        \
  59         if (likely(net_xmit_eval(err) == 0)) {                          \
  60                 u64_stats_update_begin(&(stats1)->syncp);               \
  61                 (stats1)->tx_bytes += pkt_len;                          \
  62                 (stats1)->tx_packets++;                                 \
  63                 u64_stats_update_end(&(stats1)->syncp);                 \
  64         } else {                                                        \
  65                 (stats2)->tx_errors++;                                  \
  66                 (stats2)->tx_aborted_errors++;                          \
  67         }                                                               \
  68 } while (0)
  69
  70 #define IPTUNNEL_XMIT() __IPTUNNEL_XMIT(txq, stats)
  71
  72 #endif