92 lines
2.2 KiB
C
92 lines
2.2 KiB
C
#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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#include <net/gro_cells.h>
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#include <net/ip.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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/* 6rd prefix/relay information */
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struct ip_tunnel_6rd_parm {
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struct in6_addr prefix;
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__be32 relay_prefix;
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u16 prefixlen;
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u16 relay_prefixlen;
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};
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struct ip_tunnel {
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struct ip_tunnel __rcu *next;
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struct net_device *dev;
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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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/* for SIT */
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#ifdef CONFIG_IPV6_SIT_6RD
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struct ip_tunnel_6rd_parm ip6rd;
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#endif
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struct ip_tunnel_prl_entry __rcu *prl; /* potential router list */
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unsigned int prl_count; /* # of entries in PRL */
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struct gro_cells gro_cells;
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};
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struct ip_tunnel_prl_entry {
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struct ip_tunnel_prl_entry __rcu *next;
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__be32 addr;
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u16 flags;
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struct rcu_head rcu_head;
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};
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static inline void iptunnel_xmit(struct sk_buff *skb, struct net_device *dev)
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{
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int err;
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struct iphdr *iph = ip_hdr(skb);
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int pkt_len = skb->len - skb_transport_offset(skb);
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struct pcpu_tstats *tstats = this_cpu_ptr(dev->tstats);
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nf_reset(skb);
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skb->ip_summed = CHECKSUM_NONE;
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ip_select_ident(iph, skb_dst(skb), NULL);
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err = ip_local_out(skb);
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if (likely(net_xmit_eval(err) == 0)) {
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u64_stats_update_begin(&tstats->syncp);
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tstats->tx_bytes += pkt_len;
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tstats->tx_packets++;
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u64_stats_update_end(&tstats->syncp);
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} else {
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dev->stats.tx_errors++;
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dev->stats.tx_aborted_errors++;
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}
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}
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static inline void tunnel_ip_select_ident(struct sk_buff *skb,
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const struct iphdr *old_iph,
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struct dst_entry *dst)
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{
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struct iphdr *iph = ip_hdr(skb);
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if (iph->frag_off & htons(IP_DF))
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iph->id = 0;
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else {
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/* Use inner packet iph-id if possible. */
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if (skb->protocol == htons(ETH_P_IP) && old_iph->id)
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iph->id = old_iph->id;
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else
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__ip_select_ident(iph, dst,
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(skb_shinfo(skb)->gso_segs ?: 1) - 1);
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}
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}
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#endif
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