projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | #ifndef __NET_IPIP_H |
| 2 | #define __NET_IPIP_H 1 | |
| 3 | ||
| 4 | #include <linux/if_tunnel.h> | |
| 60769a5d | 5 | #include <net/gro_cells.h> |
| c439cb2e | 6 | #include <net/ip.h> |
| 1da177e4 LT |
7 | |
| 8 | /* Keep error state on tunnel for 30 sec */ | |
| 9 | #define IPTUNNEL_ERR_TIMEO (30*HZ) | |
| 10 | ||
| fa857afc | 11 | /* 6rd prefix/relay information */ |
| fd2c3ef7 | 12 | struct ip_tunnel_6rd_parm { |
| fa857afc YH |
13 | struct in6_addr prefix; |
| 14 | __be32 relay_prefix; | |
| 15 | u16 prefixlen; | |
| 16 | u16 relay_prefixlen; | |
| 17 | }; | |
| 18 | ||
| fd2c3ef7 | 19 | struct ip_tunnel { |
| 6f0bcf15 | 20 | struct ip_tunnel __rcu *next; |
| 1da177e4 | 21 | struct net_device *dev; |
| 1da177e4 | 22 | |
| 1da177e4 LT |
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; | |
| 300aaeea | 33 | |
| fa857afc YH |
34 | /* for SIT */ |
| 35 | #ifdef CONFIG_IPV6_SIT_6RD | |
| 36 | struct ip_tunnel_6rd_parm ip6rd; | |
| 37 | #endif | |
| b33eab08 | 38 | struct ip_tunnel_prl_entry __rcu *prl; /* potential router list */ |
| 300aaeea | 39 | unsigned int prl_count; /* # of entries in PRL */ |
| 60769a5d ED |
40 | |
| 41 | struct gro_cells gro_cells; | |
| fadf6bf0 TF |
42 | }; |
| 43 | ||
| fd2c3ef7 | 44 | struct ip_tunnel_prl_entry { |
| b33eab08 | 45 | struct ip_tunnel_prl_entry __rcu *next; |
| 300aaeea YH |
46 | __be32 addr; |
| 47 | u16 flags; | |
| ef9a9d11 | 48 | struct rcu_head rcu_head; |
| 1da177e4 LT |
49 | }; |
| 50 | ||
| aa0010f8 AW |
51 | static inline void iptunnel_xmit(struct sk_buff *skb, struct net_device *dev) |
| 52 | { | |
| 53 | int err; | |
| 54 | struct iphdr *iph = ip_hdr(skb); | |
| 55 | int pkt_len = skb->len - skb_transport_offset(skb); | |
| 56 | struct pcpu_tstats *tstats = this_cpu_ptr(dev->tstats); | |
| 1da177e4 | 57 | |
| aa0010f8 AW |
58 | nf_reset(skb); |
| 59 | skb->ip_summed = CHECKSUM_NONE; | |
| 60 | ip_select_ident(iph, skb_dst(skb), NULL); | |
| 61 | ||
| 62 | err = ip_local_out(skb); | |
| 63 | if (likely(net_xmit_eval(err) == 0)) { | |
| 64 | u64_stats_update_begin(&tstats->syncp); | |
| 65 | tstats->tx_bytes += pkt_len; | |
| 66 | tstats->tx_packets++; | |
| 67 | u64_stats_update_end(&tstats->syncp); | |
| 68 | } else { | |
| 69 | dev->stats.tx_errors++; | |
| 70 | dev->stats.tx_aborted_errors++; | |
| 71 | } | |
| 72 | } | |
| 290b895e | 73 | |
| 490ab081 PS |
74 | static inline void tunnel_ip_select_ident(struct sk_buff *skb, |
| 75 | const struct iphdr *old_iph, | |
| 76 | struct dst_entry *dst) | |
| 77 | { | |
| 78 | struct iphdr *iph = ip_hdr(skb); | |
| 79 | ||
| 330305cc PS |
80 | /* Use inner packet iph-id if possible. */ |
| 81 | if (skb->protocol == htons(ETH_P_IP) && old_iph->id) | |
| 82 | iph->id = old_iph->id; | |
| 83 | else | |
| 84 | __ip_select_ident(iph, dst, | |
| 85 | (skb_shinfo(skb)->gso_segs ?: 1) - 1); | |
| 490ab081 | 86 | } |
| 1da177e4 | 87 | #endif |