linux - include/net/ipip.h

47 lines · 1.2 KiB

1	#ifndef __NET_IPIP_H
2	#define __NET_IPIP_H 1
3
4	#include <linux/if_tunnel.h>
5
6	/* Keep error state on tunnel for 30 sec */
7	#define IPTUNNEL_ERR_TIMEO (30*HZ)
8
9	struct ip_tunnel
10	{
11	struct ip_tunnel *next;
12	struct net_device *dev;
13	struct net_device_stats stat;
14
15	int recursion; /* Depth of hard_start_xmit recursion */
16	int err_count; /* Number of arrived ICMP errors */
17	unsigned long err_time; /* Time when the last ICMP error arrived */
18
19	/* These four fields used only by GRE */
20	__u32 i_seqno; /* The last seen seqno */
21	__u32 o_seqno; /* The last output seqno */
22	int hlen; /* Precalculated GRE header length */
23	int mlink;
24
25	struct ip_tunnel_parm parms;
26	};
27
28	#define IPTUNNEL_XMIT() do { \
29	int err; \
30	int pkt_len = skb->len; \
31	\
32	skb->ip_summed = CHECKSUM_NONE; \
33	iph->tot_len = htons(skb->len); \
34	ip_select_ident(iph, &rt->u.dst, NULL); \
35	ip_send_check(iph); \
36	\
37	err = NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, rt->u.dst.dev, dst_output);\
38	if (net_xmit_eval(err) == 0) { \
39	stats->tx_bytes += pkt_len; \
40	stats->tx_packets++; \
41	} else { \
42	stats->tx_errors++; \
43	stats->tx_aborted_errors++; \
44	} \
45	} while (0)
46
47	#endif