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 10struct ip_tunnel 11{ 12 struct ip_tunnel *next; 13 struct net_device *dev; 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 struct ip_tunnel_prl_entry *prl; /* potential router list */ 28 unsigned int prl_count; /* # of entries in PRL */ 29}; 30 31struct ip_tunnel_prl_entry 32{ 33 struct ip_tunnel_prl_entry *next; 34 __be32 addr; 35 u16 flags; 36}; 37 38#define IPTUNNEL_XMIT() do { \ 39 int err; \ 40 int pkt_len = skb->len; \ 41 \ 42 skb->ip_summed = CHECKSUM_NONE; \ 43 ip_select_ident(iph, &rt->u.dst, NULL); \ 44 \ 45 err = ip_local_out(skb); \ 46 if (net_xmit_eval(err) == 0) { \ 47 stats->tx_bytes += pkt_len; \ 48 stats->tx_packets++; \ 49 } else { \ 50 stats->tx_errors++; \ 51 stats->tx_aborted_errors++; \ 52 } \ 53} while (0) 54 55#endif 56