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c12b395a46
GRE over IPv6 implementation. Signed-off-by: Dmitry Kozlov <xeb@mail.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
#ifndef _NET_IP6_TUNNEL_H
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#define _NET_IP6_TUNNEL_H
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#include <linux/ipv6.h>
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#include <linux/netdevice.h>
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#include <linux/ip6_tunnel.h>
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#define IP6TUNNEL_ERR_TIMEO (30*HZ)
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/* capable of sending packets */
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#define IP6_TNL_F_CAP_XMIT 0x10000
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/* capable of receiving packets */
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#define IP6_TNL_F_CAP_RCV 0x20000
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/* determine capability on a per-packet basis */
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#define IP6_TNL_F_CAP_PER_PACKET 0x40000
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struct __ip6_tnl_parm {
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char name[IFNAMSIZ]; /* name of tunnel device */
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int link; /* ifindex of underlying L2 interface */
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__u8 proto; /* tunnel protocol */
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__u8 encap_limit; /* encapsulation limit for tunnel */
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__u8 hop_limit; /* hop limit for tunnel */
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__be32 flowinfo; /* traffic class and flowlabel for tunnel */
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__u32 flags; /* tunnel flags */
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struct in6_addr laddr; /* local tunnel end-point address */
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struct in6_addr raddr; /* remote tunnel end-point address */
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__be16 i_flags;
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__be16 o_flags;
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__be32 i_key;
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__be32 o_key;
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};
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/* IPv6 tunnel */
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struct ip6_tnl {
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struct ip6_tnl __rcu *next; /* next tunnel in list */
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struct net_device *dev; /* virtual device associated with tunnel */
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struct __ip6_tnl_parm parms; /* tunnel configuration parameters */
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struct flowi fl; /* flowi template for xmit */
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struct dst_entry *dst_cache; /* cached dst */
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u32 dst_cookie;
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int err_count;
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unsigned long err_time;
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/* These 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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};
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/* Tunnel encapsulation limit destination sub-option */
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struct ipv6_tlv_tnl_enc_lim {
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__u8 type; /* type-code for option */
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__u8 length; /* option length */
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__u8 encap_limit; /* tunnel encapsulation limit */
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} __packed;
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struct dst_entry *ip6_tnl_dst_check(struct ip6_tnl *t);
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void ip6_tnl_dst_reset(struct ip6_tnl *t);
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void ip6_tnl_dst_store(struct ip6_tnl *t, struct dst_entry *dst);
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int ip6_tnl_rcv_ctl(struct ip6_tnl *t, const struct in6_addr *laddr,
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const struct in6_addr *raddr);
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int ip6_tnl_xmit_ctl(struct ip6_tnl *t);
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__u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw);
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__u32 ip6_tnl_get_cap(struct ip6_tnl *t, const struct in6_addr *laddr,
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const struct in6_addr *raddr);
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#endif
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