52 строки
1.3 KiB
C
52 строки
1.3 KiB
C
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#ifndef __NET_IPIP_H
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#define __NET_IPIP_H 1
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#include <linux/if_tunnel.h>
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/* Keep error state on tunnel for 30 sec */
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#define IPTUNNEL_ERR_TIMEO (30*HZ)
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struct ip_tunnel
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{
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struct ip_tunnel *next;
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struct net_device *dev;
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struct net_device_stats stat;
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int recursion; /* Depth of hard_start_xmit recursion */
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int err_count; /* Number of arrived ICMP errors */
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unsigned long err_time; /* Time when the last ICMP error arrived */
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/* These four fields used only by GRE */
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__u32 i_seqno; /* The last seen seqno */
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__u32 o_seqno; /* The last output seqno */
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int hlen; /* Precalculated GRE header length */
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int mlink;
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struct ip_tunnel_parm parms;
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};
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#define IPTUNNEL_XMIT() do { \
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int err; \
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int pkt_len = skb->len; \
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\
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skb->ip_summed = CHECKSUM_NONE; \
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iph->tot_len = htons(skb->len); \
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ip_select_ident(iph, &rt->u.dst, NULL); \
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ip_send_check(iph); \
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\
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err = NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, rt->u.dst.dev, dst_output);\
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if (err == NET_XMIT_SUCCESS || err == NET_XMIT_CN) { \
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stats->tx_bytes += pkt_len; \
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stats->tx_packets++; \
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} else { \
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stats->tx_errors++; \
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stats->tx_aborted_errors++; \
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} \
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} while (0)
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extern int sit_init(void);
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extern void sit_cleanup(void);
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#endif
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