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Commit c12b395a authored by xeb@mail.ru's avatar xeb@mail.ru Committed by David S. Miller
Browse files

gre: Support GRE over IPv6 



GRE over IPv6 implementation.

Signed-off-by: default avatarDmitry Kozlov <xeb@mail.ru>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b7bc2a5b

include/linux/if_arp.h

+1 −0
Original line number Diff line number Diff line
@@ -92,6 +92,7 @@ 
#define ARPHRD_PHONET	820		/* PhoNet media type		*/

#define ARPHRD_PHONET_PIPE 821		/* PhoNet pipe header		*/

#define ARPHRD_CAIF	822		/* CAIF media type		*/

#define ARPHRD_IP6GRE	823		/* GRE over IPv6		*/



#define ARPHRD_VOID	  0xFFFF	/* Void type, nothing is known */

#define ARPHRD_NONE	  0xFFFE	/* zero header length */

include/linux/if_tunnel.h

+3 −0
Original line number Diff line number Diff line
@@ -75,6 +75,9 @@ enum { 
	IFLA_GRE_TTL,

	IFLA_GRE_TOS,

	IFLA_GRE_PMTUDISC,

	IFLA_GRE_ENCAP_LIMIT,

	IFLA_GRE_FLOWINFO,

	IFLA_GRE_FLAGS,

	__IFLA_GRE_MAX,

};

include/linux/ip6_tunnel.h

+17 −0
Original line number Diff line number Diff line
@@ -31,4 +31,21 @@ struct ip6_tnl_parm { 
	struct in6_addr raddr;	/* remote tunnel end-point address */

};



struct ip6_tnl_parm2 {

	char name[IFNAMSIZ];	/* name of tunnel device */

	int link;		/* ifindex of underlying L2 interface */

	__u8 proto;		/* tunnel protocol */

	__u8 encap_limit;	/* encapsulation limit for tunnel */

	__u8 hop_limit;		/* hop limit for tunnel */

	__be32 flowinfo;	/* traffic class and flowlabel for tunnel */

	__u32 flags;		/* tunnel flags */

	struct in6_addr laddr;	/* local tunnel end-point address */

	struct in6_addr raddr;	/* remote tunnel end-point address */



	__be16			i_flags;

	__be16			o_flags;

	__be32			i_key;

	__be32			o_key;

};



#endif

include/net/ip6_tunnel.h

+39 −2
Original line number Diff line number Diff line
@@ -5,6 +5,8 @@ 
#include <linux/netdevice.h>

#include <linux/ip6_tunnel.h>



#define IP6TUNNEL_ERR_TIMEO (30*HZ)



/* capable of sending packets */

#define IP6_TNL_F_CAP_XMIT 0x10000

/* capable of receiving packets */
@@ -12,15 +14,40 @@ 
/* determine capability on a per-packet basis */

#define IP6_TNL_F_CAP_PER_PACKET 0x40000



/* IPv6 tunnel */

struct __ip6_tnl_parm {

	char name[IFNAMSIZ];	/* name of tunnel device */

	int link;		/* ifindex of underlying L2 interface */

	__u8 proto;		/* tunnel protocol */

	__u8 encap_limit;	/* encapsulation limit for tunnel */

	__u8 hop_limit;		/* hop limit for tunnel */

	__be32 flowinfo;	/* traffic class and flowlabel for tunnel */

	__u32 flags;		/* tunnel flags */

	struct in6_addr laddr;	/* local tunnel end-point address */

	struct in6_addr raddr;	/* remote tunnel end-point address */



	__be16			i_flags;

	__be16			o_flags;

	__be32			i_key;

	__be32			o_key;

};



/* IPv6 tunnel */

struct ip6_tnl {

	struct ip6_tnl __rcu *next;	/* next tunnel in list */

	struct net_device *dev;	/* virtual device associated with tunnel */

	struct ip6_tnl_parm parms;	/* tunnel configuration parameters */

	struct __ip6_tnl_parm parms;	/* tunnel configuration parameters */

	struct flowi fl;	/* flowi template for xmit */

	struct dst_entry *dst_cache;    /* cached dst */

	u32 dst_cookie;



	int err_count;

	unsigned long err_time;



	/* These fields used only by GRE */

	__u32 i_seqno;	/* The last seen seqno	*/

	__u32 o_seqno;	/* The last output seqno */

	int hlen;       /* Precalculated GRE header length */

	int mlink;

};



/* Tunnel encapsulation limit destination sub-option */
@@ -31,4 +58,14 @@ struct ipv6_tlv_tnl_enc_lim { 
	__u8 encap_limit;	/* tunnel encapsulation limit   */

} __packed;



struct dst_entry *ip6_tnl_dst_check(struct ip6_tnl *t);

void ip6_tnl_dst_reset(struct ip6_tnl *t);

void ip6_tnl_dst_store(struct ip6_tnl *t, struct dst_entry *dst);

int ip6_tnl_rcv_ctl(struct ip6_tnl *t, const struct in6_addr *laddr,

		const struct in6_addr *raddr);

int ip6_tnl_xmit_ctl(struct ip6_tnl *t);

__u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw);

__u32 ip6_tnl_get_cap(struct ip6_tnl *t, const struct in6_addr *laddr,

			     const struct in6_addr *raddr);



#endif

include/net/ipv6.h

+1 −0
Original line number Diff line number Diff line
@@ -34,6 +34,7 @@ 
#define NEXTHDR_IPV6		41	/* IPv6 in IPv6 */

#define NEXTHDR_ROUTING		43	/* Routing header. */

#define NEXTHDR_FRAGMENT	44	/* Fragmentation/reassembly header. */

#define NEXTHDR_GRE		47	/* GRE header. */

#define NEXTHDR_ESP		50	/* Encapsulating security payload. */

#define NEXTHDR_AUTH		51	/* Authentication header. */

#define NEXTHDR_ICMP		58	/* ICMP for IPv6. */