gre_tunnel_t Struct Reference

A representation of a GRE tunnel. More...

Collaboration diagram for gre_tunnel_t:

Public Member Functions
	CLIB_CACHE_LINE_ALIGN_MARK (cacheline0)
	Required for pool_get_aligned. More...

Data Fields
fib_node_t	node
	Linkage into the FIB object graph. More...
gre_tunnel_key_t *	key
	The hash table's key stored in separate memory since the tunnel_t memory can realloc. More...
ip46_address_t	tunnel_src
	The tunnel's source/local address. More...
fib_prefix_t	tunnel_dst
	The tunnel's destination/remote address. More...
u32	outer_fib_index
	The FIB in which the src.dst address are present. More...
u32	hw_if_index
u32	sw_if_index
gre_tunnel_type_t	type
fib_node_index_t	fib_entry_index
	The FIB entry sourced by the tunnel for its destination prefix. More...
u32	sibling_index
	The tunnel is a child of the FIB entry for its desintion. More...
adj_index_t	l2_adj_index
	an L2 tunnel always rquires an L2 midchain. More...
u16	session_id
	ERSPAN type 2 session ID, least significant 10 bits of u16. More...
gre_sn_t *	gre_sn
	GRE header sequence number (SN) used for ERSPAN type 2 header, must be bumped automically to be thread safe. More...
u32	dev_instance
u32	user_instance

Detailed Description

A representation of a GRE tunnel.

Definition at line 176 of file gre.h.

Member Function Documentation

gre_tunnel_t::CLIB_CACHE_LINE_ALIGN_MARK

(

cacheline0

)

Required for pool_get_aligned.

Field Documentation

u32 gre_tunnel_t::dev_instance

Definition at line 242 of file gre.h.

fib_node_index_t gre_tunnel_t::fib_entry_index

The FIB entry sourced by the tunnel for its destination prefix.

Definition at line 213 of file gre.h.

gre_sn_t* gre_tunnel_t::gre_sn

GRE header sequence number (SN) used for ERSPAN type 2 header, must be bumped automically to be thread safe.

As multiple GRE tunnels are created for the same fib-idx/DIP/SIP with different ERSPAN session number, they all share the same SN which is kept per FIB/DIP/SIP, as specified by RFC2890.

Definition at line 239 of file gre.h.

u32 gre_tunnel_t::hw_if_index

Definition at line 206 of file gre.h.

gre_tunnel_key_t* gre_tunnel_t::key

The hash table's key stored in separate memory since the tunnel_t memory can realloc.

Definition at line 192 of file gre.h.

adj_index_t gre_tunnel_t::l2_adj_index

an L2 tunnel always rquires an L2 midchain.

cache here for DP.

Definition at line 226 of file gre.h.

fib_node_t gre_tunnel_t::node

Linkage into the FIB object graph.

Definition at line 186 of file gre.h.

u32 gre_tunnel_t::outer_fib_index

The FIB in which the src.dst address are present.

Definition at line 205 of file gre.h.

u16 gre_tunnel_t::session_id

ERSPAN type 2 session ID, least significant 10 bits of u16.

Definition at line 231 of file gre.h.

u32 gre_tunnel_t::sibling_index

The tunnel is a child of the FIB entry for its desintion.

This is so it receives updates when the forwarding information for that entry changes. The tunnels sibling index on the FIB entry's dependency list.

Definition at line 221 of file gre.h.

u32 gre_tunnel_t::sw_if_index

Definition at line 207 of file gre.h.

fib_prefix_t gre_tunnel_t::tunnel_dst

The tunnel's destination/remote address.

Definition at line 201 of file gre.h.

ip46_address_t gre_tunnel_t::tunnel_src

The tunnel's source/local address.

Definition at line 197 of file gre.h.

gre_tunnel_type_t gre_tunnel_t::type

Definition at line 208 of file gre.h.

u32 gre_tunnel_t::user_instance

Definition at line 243 of file gre.h.

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The documentation for this struct was generated from the following file:

• src/vnet/gre/gre.h