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,

Enumerations
enum	ip_vxlan_bypass_next_t {   IP_VXLAN_BYPASS_NEXT_DROP, IP_VXLAN_BYPASS_NEXT_VXLAN, IP_VXLAN_BYPASS_N_NEXT, IP_VXLAN_BYPASS_NEXT_DROP,   IP_VXLAN_BYPASS_NEXT_VXLAN, IP_VXLAN_BYPASS_N_NEXT }

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...
VLIB_NODE_FN()	vxlan4_gpe_input_node (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)
VLIB_NODE_FN()	vxlan6_gpe_input_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
	Graph processing dispatch function for IPv6 VXLAN GPE. More...
static uword	ip_vxlan_gpe_bypass_inline (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, u32 is_ip4)
VLIB_NODE_FN()	ip4_vxlan_gpe_bypass_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
clib_error_t *	ip4_vxlan_gpe_bypass_init (vlib_main_t *vm)
VLIB_NODE_FN()	ip6_vxlan_gpe_bypass_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
clib_error_t *	ip6_vxlan_gpe_bypass_init (vlib_main_t *vm)

Variables
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...
vlib_node_registration_t	ip4_vxlan_gpe_bypass_node
	(constructor) VLIB_REGISTER_NODE (ip4_vxlan_gpe_bypass_node) More...
vlib_node_registration_t	ip6_vxlan_gpe_bypass_node
	(constructor) VLIB_REGISTER_NODE (ip6_vxlan_gpe_bypass_node) More...

Detailed Description

Functions for decapsulating VXLAN GPE tunnels.

Definition in file decap.c.

Macro Definition Documentation

vxlan_gpe_error

#define vxlan_gpe_error	(		n,
			s
	)		s,

Enumeration Type Documentation

ip_vxlan_bypass_next_t

enum ip_vxlan_bypass_next_t

Enumerator
IP_VXLAN_BYPASS_NEXT_DROP
IP_VXLAN_BYPASS_NEXT_VXLAN
IP_VXLAN_BYPASS_N_NEXT
IP_VXLAN_BYPASS_NEXT_DROP
IP_VXLAN_BYPASS_NEXT_VXLAN
IP_VXLAN_BYPASS_N_NEXT

Definition at line 787 of file decap.c.

Function Documentation

format_vxlan_gpe_rx_trace()

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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format_vxlan_gpe_with_length()

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 77 of file decap.c.

ip4_vxlan_gpe_bypass_init()

clib_error_t* ip4_vxlan_gpe_bypass_init

(

vlib_main_t *

vm

)

Definition at line 1212 of file decap.c.

ip4_vxlan_gpe_bypass_node()

VLIB_NODE_FN() ip4_vxlan_gpe_bypass_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

Definition at line 1186 of file decap.c.

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ip6_vxlan_gpe_bypass_init()

clib_error_t* ip6_vxlan_gpe_bypass_init

(

vlib_main_t *

vm

)

Definition at line 1246 of file decap.c.

ip6_vxlan_gpe_bypass_node()

VLIB_NODE_FN() ip6_vxlan_gpe_bypass_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

Definition at line 1220 of file decap.c.

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ip_vxlan_gpe_bypass_inline()

static uword ip_vxlan_gpe_bypass_inline ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame, u32  is_ip4  )

inlinestatic

Definition at line 795 of file decap.c.

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vxlan4_gpe_input_node()

VLIB_NODE_FN() vxlan4_gpe_input_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	from_frame
	)

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 690 of file decap.c.

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vxlan6_gpe_input_node()

VLIB_NODE_FN() vxlan6_gpe_input_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	from_frame
	)

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 726 of file decap.c.

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vxlan_gpe_input()

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 106 of file decap.c.

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vxlan_gpe_register_decap_protocol()

void vxlan_gpe_register_decap_protocol	(	u8	protocol_id,
		uword	next_node_index
	)

Definition at line 699 of file decap.c.

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vxlan_gpe_unregister_decap_protocol()

void vxlan_gpe_unregister_decap_protocol	(	u8	protocol_id,
		uword	next_node_index
	)

Definition at line 707 of file decap.c.

Variable Documentation

ip4_vxlan_gpe_bypass_node

vlib_node_registration_t ip4_vxlan_gpe_bypass_node

Initial value:

= {
  .name = "ip4-vxlan-gpe-bypass",
  .vector_size = sizeof (u32),

  .n_next_nodes = IP_VXLAN_BYPASS_N_NEXT,
  .next_nodes = {
    [IP_VXLAN_BYPASS_NEXT_DROP] = "error-drop",
    [IP_VXLAN_BYPASS_NEXT_VXLAN] = "vxlan4-gpe-input",
  },

  .format_buffer = format_ip4_header,
  .format_trace = format_ip4_forward_next_trace,
}

(constructor) VLIB_REGISTER_NODE (ip4_vxlan_gpe_bypass_node)

Definition at line 1194 of file decap.c.

ip6_vxlan_gpe_bypass_node

vlib_node_registration_t ip6_vxlan_gpe_bypass_node

Initial value:

= {
  .name = "ip6-vxlan-gpe-bypass",
  .vector_size = sizeof (u32),

  .n_next_nodes = IP_VXLAN_BYPASS_N_NEXT,
  .next_nodes = {
    [IP_VXLAN_BYPASS_NEXT_DROP] = "error-drop",
    [IP_VXLAN_BYPASS_NEXT_VXLAN] = "vxlan6-gpe-input",
  },

  .format_buffer = format_ip6_header,
  .format_trace = format_ip6_forward_next_trace,
}

(constructor) VLIB_REGISTER_NODE (ip6_vxlan_gpe_bypass_node)

Definition at line 1228 of file decap.c.

vxlan4_gpe_input_node

vlib_node_registration_t vxlan4_gpe_input_node

Initial value:

= {
  .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 744 of file decap.c.

vxlan6_gpe_input_node

vlib_node_registration_t vxlan6_gpe_input_node

Initial value:

= {
  .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 766 of file decap.c.

vxlan_gpe_error_strings

char* vxlan_gpe_error_strings[]

static

Initial value:

= {
#define vxlan_gpe_error(n,s) 



}

VXLAN GPE error strings.

Definition at line 736 of file decap.c.