gre.c File Reference

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Data Structures
struct	ip4_and_gre_union_t
	IPv4 and GRE header union. More...
struct	ip6_and_gre_union_t
struct	gre_tx_trace_t

Macros
#define	is_v4_packet(_h)   ((*(u8*) _h) & 0xF0) == 0x40
#define	gre_error(n, s)   s,

Enumerations
enum	gre_encap_next_t { GRE_ENCAP_NEXT_L2_MIDCHAIN, GRE_ENCAP_N_NEXT }

Functions
u8 *	format_gre_tx_trace (u8 *s, va_list *args)
u8 *	format_gre_protocol (u8 *s, va_list *args)
u8 *	format_gre_header_with_length (u8 *s, va_list *args)
u8 *	format_gre_header (u8 *s, va_list *args)
uword	unformat_gre_protocol_host_byte_order (unformat_input_t *input, va_list *args)
uword	unformat_gre_protocol_net_byte_order (unformat_input_t *input, va_list *args)
uword	unformat_gre_header (unformat_input_t *input, va_list *args)
static int	gre_proto_from_vnet_link (vnet_link_t link)
static u8 *	gre_build_rewrite (vnet_main_t *vnm, u32 sw_if_index, vnet_link_t link_type, const void *dst_address)
static void	gre4_fixup (vlib_main_t *vm, ip_adjacency_t *adj, vlib_buffer_t *b0, const void *data)
static void	gre6_fixup (vlib_main_t *vm, ip_adjacency_t *adj, vlib_buffer_t *b0, const void *data)
void	gre_update_adj (vnet_main_t *vnm, u32 sw_if_index, adj_index_t ai)
static uword	gre_interface_tx (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
	TX function. More...
static u8 *	format_gre_tunnel_name (u8 *s, va_list *args)
static u8 *	format_gre_device (u8 *s, va_list *args)
	VNET_DEVICE_CLASS (gre_device_class)
	VNET_HW_INTERFACE_CLASS (gre_hw_interface_class)
static void	add_protocol (gre_main_t *gm, gre_protocol_t protocol, char *protocol_name)
static clib_error_t *	gre_init (vlib_main_t *vm)

Variables
gre_main_t	gre_main
static char *	gre_error_strings []
vlib_node_registration_t	gre_encap_node
	(constructor) VLIB_REGISTER_NODE (gre_encap_node) More...

Macro Definition Documentation

#define gre_error	(		n,
			s
	)		s,

#define is_v4_packet

(

_h

)

((*(u8*) _h) & 0xF0) == 0x40

Definition at line 268 of file gre.c.

Enumeration Type Documentation

enum gre_encap_next_t

Enumerator
GRE_ENCAP_NEXT_L2_MIDCHAIN
GRE_ENCAP_N_NEXT

Definition at line 324 of file gre.c.

Function Documentation

static void add_protocol ( gre_main_t *  gm, gre_protocol_t  protocol, char *  protocol_name  )

static

Definition at line 579 of file gre.c.

static u8* format_gre_device ( u8 *  s, va_list *  args  )

static

Definition at line 547 of file gre.c.

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u8* format_gre_header	(	u8 *	s,
		va_list *	args
	)

Definition at line 118 of file gre.c.

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u8* format_gre_header_with_length	(	u8 *	s,
		va_list *	args
	)

Definition at line 87 of file gre.c.

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u8* format_gre_protocol	(	u8 *	s,
		va_list *	args
	)

Definition at line 72 of file gre.c.

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static u8* format_gre_tunnel_name ( u8 *  s, va_list *  args  )

static

Definition at line 533 of file gre.c.

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u8* format_gre_tx_trace	(	u8 *	s,
		va_list *	args
	)

Definition at line 58 of file gre.c.

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static void gre4_fixup ( vlib_main_t *  vm, ip_adjacency_t *  adj, vlib_buffer_t *  b0, const void *  data  )

static

Definition at line 271 of file gre.c.

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static void gre6_fixup ( vlib_main_t *  vm, ip_adjacency_t *  adj, vlib_buffer_t *  b0, const void *  data  )

static

Definition at line 285 of file gre.c.

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static u8* gre_build_rewrite ( vnet_main_t *  vnm, u32  sw_if_index, vnet_link_t  link_type, const void *  dst_address  )

static

Definition at line 204 of file gre.c.

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static clib_error_t* gre_init ( vlib_main_t *  vm )

static

Definition at line 596 of file gre.c.

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static uword gre_interface_tx ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame  )

static

TX function.

Only called for L2 payload including TEB or ERSPAN. L3 traffic uses the adj-midchains.

Definition at line 335 of file gre.c.

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static int gre_proto_from_vnet_link ( vnet_link_t  link )

static

Definition at line 181 of file gre.c.

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void gre_update_adj	(	vnet_main_t *	vnm,
		u32	sw_if_index,
		adj_index_t	ai
	)

Definition at line 300 of file gre.c.

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uword unformat_gre_header	(	unformat_input_t *	input,
		va_list *	args
	)

Definition at line 157 of file gre.c.

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uword unformat_gre_protocol_host_byte_order	(	unformat_input_t *	input,
		va_list *	args
	)

Definition at line 126 of file gre.c.

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uword unformat_gre_protocol_net_byte_order	(	unformat_input_t *	input,
		va_list *	args
	)

Definition at line 146 of file gre.c.

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VNET_DEVICE_CLASS

(

gre_device_class

)

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VNET_HW_INTERFACE_CLASS

(

gre_hw_interface_class

)

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Variable Documentation

vlib_node_registration_t gre_encap_node

Initial value:

=
{
  .function = gre_interface_tx,
  .name = "gre-encap",
  .vector_size = sizeof (u32),
  .format_trace = format_gre_tx_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = GRE_N_ERROR,
  .error_strings = gre_error_strings,
  .n_next_nodes = GRE_ENCAP_N_NEXT,
  .next_nodes = {
    [GRE_ENCAP_NEXT_L2_MIDCHAIN] = "adj-l2-midchain",
  },
}

(constructor) VLIB_REGISTER_NODE (gre_encap_node)

Definition at line 514 of file gre.c.

char* gre_error_strings[]

static

Initial value:

= {
#define gre_error(n,s) 


gre_error (NONE, "no error")
gre_error (UNKNOWN_PROTOCOL, "unknown protocol")
gre_error (UNSUPPORTED_VERSION, "unsupported version")
gre_error (PKTS_DECAP, "GRE input packets decapsulated")
gre_error (PKTS_ENCAP, "GRE output packets encapsulated")
gre_error (NO_SUCH_TUNNEL, "GRE input packets dropped due to missing tunnel")

}

Definition at line 507 of file gre.c.

gre_main_t gre_main

Definition at line 22 of file gre.c.