decap.c File Reference

Functions for decapsulating VXLAN GPE tunnels. More...

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Data Structures
struct	vxlan_gpe_rx_trace_t
	Struct for VXLAN GPE decap packet tracing. More...

Macros
#define	vxlan_gpe_error(n, s)   s,

Functions
static u8 *	format_vxlan_gpe_rx_trace (u8 *s, va_list *args)
	Tracing function for VXLAN GPE packet decapsulation. More...
static u8 *	format_vxlan_gpe_with_length (u8 *s, va_list *args)
	Tracing function for VXLAN GPE packet decapsulation including length. More...
static uword	vxlan_gpe_input (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame, u8 is_ip4)
	Common processing for IPv4 and IPv6 VXLAN GPE decap dispatch functions. More...
static uword	vxlan4_gpe_input (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
	Graph processing dispatch function for IPv4 VXLAN GPE. More...
void	vxlan_gpe_register_decap_protocol (u8 protocol_id, uword next_node_index)
void	vxlan_gpe_unregister_decap_protocol (u8 protocol_id, uword next_node_index)
static uword	vxlan6_gpe_input (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
	Graph processing dispatch function for IPv6 VXLAN GPE. More...
	VLIB_NODE_FUNCTION_MULTIARCH (vxlan4_gpe_input_node, vxlan4_gpe_input)
	VLIB_NODE_FUNCTION_MULTIARCH (vxlan6_gpe_input_node, vxlan6_gpe_input)

Variables
vlib_node_registration_t	vxlan_gpe_input_node
static char *	vxlan_gpe_error_strings []
	VXLAN GPE error strings. More...
vlib_node_registration_t	vxlan4_gpe_input_node
	(constructor) VLIB_REGISTER_NODE (vxlan4_gpe_input_node) More...
vlib_node_registration_t	vxlan6_gpe_input_node
	(constructor) VLIB_REGISTER_NODE (vxlan6_gpe_input_node) More...

Detailed Description

Functions for decapsulating VXLAN GPE tunnels.

Definition in file decap.c.

Macro Definition Documentation

#define vxlan_gpe_error	(		n,
			s
	)		s,

Function Documentation

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

static

Tracing function for VXLAN GPE packet decapsulation.

Parameters

*s
*args

Returns

*s

Definition at line 48 of file decap.c.

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

static

Tracing function for VXLAN GPE packet decapsulation including length.

Parameters

*s
*args

Returns

*s

Definition at line 76 of file decap.c.

VLIB_NODE_FUNCTION_MULTIARCH	(	vxlan4_gpe_input_node	,
		vxlan4_gpe_input
	)

VLIB_NODE_FUNCTION_MULTIARCH	(	vxlan6_gpe_input_node	,
		vxlan6_gpe_input
	)

static uword vxlan4_gpe_input ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  from_frame  )

static

Graph processing dispatch function for IPv4 VXLAN GPE.

Node Identifier:

vxlan4-gpe-input

Parameters

*vm
*node
*from_frame

Returns

from_frame->n_vectors

Definition at line 637 of file decap.c.

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static uword vxlan6_gpe_input ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  from_frame  )

static

Graph processing dispatch function for IPv6 VXLAN GPE.

Node Identifier:

vxlan6-gpe-input

Parameters

*vm
*node
*from_frame

Returns

from_frame->n_vectors - uword

Definition at line 673 of file decap.c.

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static uword vxlan_gpe_input ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  from_frame, u8  is_ip4  )

inlinestatic

Common processing for IPv4 and IPv6 VXLAN GPE decap dispatch functions.

It is worth noting that other than trivial UDP forwarding (transit), VXLAN GPE tunnels are "terminate local". This means that there is no "TX" interface for this decap case, so that field in the buffer_metadata can be "used for something else". The something else in this case is, for the IPv4/IPv6 inner-packet type case, the FIB index used to look up the inner-packet's adjacency.

 vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->decap_fib_index;

Parameters

*vm
*node
*from_frame
is_ip4

Returns

from_frame->n_vectors

ip[46] lookup in the configured FIB

Definition at line 105 of file decap.c.

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void vxlan_gpe_register_decap_protocol	(	u8	protocol_id,
		uword	next_node_index
	)

Definition at line 645 of file decap.c.

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void vxlan_gpe_unregister_decap_protocol	(	u8	protocol_id,
		uword	next_node_index
	)

Definition at line 653 of file decap.c.

Variable Documentation

vlib_node_registration_t vxlan4_gpe_input_node

Initial value:

= {
  .function = vxlan4_gpe_input,
  .name = "vxlan4-gpe-input",
  
  .vector_size = sizeof (u32),
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN(vxlan_gpe_error_strings),
  .error_strings = vxlan_gpe_error_strings,

  .n_next_nodes = VXLAN_GPE_INPUT_N_NEXT,
  .next_nodes = {
#define _(s,n) 
    foreach_vxlan_gpe_input_next

  },

  .format_buffer = format_vxlan_gpe_with_length,
  .format_trace = format_vxlan_gpe_rx_trace,
  
}

(constructor) VLIB_REGISTER_NODE (vxlan4_gpe_input_node)

Definition at line 689 of file decap.c.

vlib_node_registration_t vxlan6_gpe_input_node

Initial value:

= {
  .function = vxlan6_gpe_input,
  .name = "vxlan6-gpe-input",
  
  .vector_size = sizeof (u32),
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN(vxlan_gpe_error_strings),
  .error_strings = vxlan_gpe_error_strings,

  .n_next_nodes = VXLAN_GPE_INPUT_N_NEXT,
  .next_nodes = {
#define _(s,n) 
    foreach_vxlan_gpe_input_next

  },

  .format_buffer = format_vxlan_gpe_with_length,
  .format_trace = format_vxlan_gpe_rx_trace,
  
}

(constructor) VLIB_REGISTER_NODE (vxlan6_gpe_input_node)

Definition at line 712 of file decap.c.

char* vxlan_gpe_error_strings[]

static

Initial value:

= {
#define vxlan_gpe_error(n,s) 

vxlan_gpe_error (DECAPSULATED, "good packets decapsulated")
vxlan_gpe_error (NO_SUCH_TUNNEL, "no such tunnel packets")


}

VXLAN GPE error strings.

Definition at line 682 of file decap.c.

vlib_node_registration_t vxlan_gpe_input_node

Definition at line 27 of file decap.c.