| 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->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 |