projects/linux·blob v3.2 · refs

67 lines · 1.6 KiB

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 */
11struct ip_tunnel_6rd_parm {
12 struct in6_addr prefix;
13 __be32 relay_prefix;
14 u16 prefixlen;
15 u16 relay_prefixlen;
16};
17
18struct ip_tunnel {
19 struct ip_tunnel __rcu *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 __rcu *prl; /* potential router list */
38 unsigned int prl_count; /* # of entries in PRL */
39};
40
41struct ip_tunnel_prl_entry {
42 struct ip_tunnel_prl_entry __rcu *next;
43 __be32 addr;
44 u16 flags;
45 struct rcu_head rcu_head;
46};
47
48#define __IPTUNNEL_XMIT(stats1, stats2) 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 (stats1)->tx_bytes += pkt_len; \
58 (stats1)->tx_packets++; \
59 } else { \
60 (stats2)->tx_errors++; \
61 (stats2)->tx_aborted_errors++; \
62 } \
63} while (0)
64
65#define IPTUNNEL_XMIT() __IPTUNNEL_XMIT(txq, stats)
66
67#endif