encap.c File Reference

Functions for encapsulating VXLAN GPE tunnels. More...

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Data Structures
struct	vxlan_gpe_encap_trace_t
	Struct for tracing VXLAN GPE encapsulated packets. More...

Macros
#define	foreach_vxlan_gpe_encap_error   _(ENCAPSULATED, "good packets encapsulated")
	Statistics (not really errors) More...

Enumerations
enum	vxlan_gpe_encap_error_t { VXLAN_GPE_ENCAP_N_ERROR }
	Struct for VXLAN GPE errors/counters. More...

Functions
u8 *	format_vxlan_gpe_encap_trace (u8 *s, va_list *args)
	Trace of packets encapsulated in VXLAN GPE. More...
static void	vxlan_gpe_encap_one_inline (vxlan_gpe_main_t *ngm, vlib_buffer_t *b0, vxlan_gpe_tunnel_t *t0, u32 *next0, u8 is_v4)
	Instantiates UDP + VXLAN-GPE header then set next node to IP4|6 lookup. More...
static void	vxlan_gpe_encap_two_inline (vxlan_gpe_main_t *ngm, vlib_buffer_t *b0, vlib_buffer_t *b1, vxlan_gpe_tunnel_t *t0, vxlan_gpe_tunnel_t *t1, u32 *next0, u32 *next1, u8 is_v4)
	Instantiates UDP + VXLAN-GPE header then set next node to IP4|6 lookup for two packets. More...
static uword	vxlan_gpe_encap (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
	Common processing for IPv4 and IPv6 VXLAN GPE encap dispatch functions. More...

Variables
static char *	vxlan_gpe_encap_error_strings []
	VXLAN GPE encap error strings. More...
vlib_node_registration_t	vxlan_gpe_encap_node
	(constructor) VLIB_REGISTER_NODE (vxlan_gpe_encap_node) More...

Detailed Description

Functions for encapsulating VXLAN GPE tunnels.

Definition in file encap.c.

Macro Definition Documentation

#define foreach_vxlan_gpe_encap_error   _(ENCAPSULATED, "good packets encapsulated")

Statistics (not really errors)

Definition at line 28 of file encap.c.

Enumeration Type Documentation

enum vxlan_gpe_encap_error_t

Struct for VXLAN GPE errors/counters.

Enumerator
VXLAN_GPE_ENCAP_N_ERROR

Definition at line 43 of file encap.c.

Function Documentation

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

Trace of packets encapsulated in VXLAN GPE.

Parameters

*s
*args

Returns

*s

Definition at line 69 of file encap.c.

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

static

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

It is worth noting that other than trivial UDP forwarding (transit), VXLAN GPE tunnels are "establish local". This means that we don't have a TX interface as yet as we need to look up where the outer-header dest is. By setting the TX index in the buffer metadata to the encap FIB, we can do a lookup to get the adjacency and real TX.

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

Node Identifier:

vxlan-gpe-input

Parameters

*vm
*node
*from_frame

Returns

from_frame->n_vectors

Definition at line 146 of file encap.c.

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static void vxlan_gpe_encap_one_inline ( vxlan_gpe_main_t *  ngm, vlib_buffer_t *  b0, vxlan_gpe_tunnel_t *  t0, u32 *  next0, u8  is_v4  )

inlinestatic

Instantiates UDP + VXLAN-GPE header then set next node to IP4|6 lookup.

Parameters

*ngm
*b0
*t0	contains rewrite header
*next0	relative index of next dispatch function (next node)
is_v4	Is this IPv4? (or IPv6)

Definition at line 90 of file encap.c.

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static void vxlan_gpe_encap_two_inline ( vxlan_gpe_main_t *  ngm, vlib_buffer_t *  b0, vlib_buffer_t *  b1, vxlan_gpe_tunnel_t *  t0, vxlan_gpe_tunnel_t *  t1, u32 *  next0, u32 *  next1, u8  is_v4  )

inlinestatic

Instantiates UDP + VXLAN-GPE header then set next node to IP4|6 lookup for two packets.

Parameters

*ngm
*b0	Packet0
*b1	Packet1
*t0	contains rewrite header for Packet0
*t1	contains rewrite header for Packet1
*next0	relative index of next dispatch function (next node) for Packet0
*next1	relative index of next dispatch function (next node) for Packet1
is_v4	Is this IPv4? (or IPv6)

Definition at line 114 of file encap.c.

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Variable Documentation

char* vxlan_gpe_encap_error_strings[]

static

Initial value:

= {
#define _(sym,string) 
  foreach_vxlan_gpe_encap_error

}

VXLAN GPE encap error strings.

Definition at line 34 of file encap.c.

vlib_node_registration_t vxlan_gpe_encap_node

Initial value:

= {
  .function = vxlan_gpe_encap,
  .name = "vxlan-gpe-encap",
  .vector_size = sizeof (u32),
  .format_trace = format_vxlan_gpe_encap_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,

  .n_errors = ARRAY_LEN(vxlan_gpe_encap_error_strings),
  .error_strings = vxlan_gpe_encap_error_strings,

  .n_next_nodes = VXLAN_GPE_ENCAP_N_NEXT,

  .next_nodes = {
    [VXLAN_GPE_ENCAP_NEXT_IP4_LOOKUP] = "ip4-lookup",
    [VXLAN_GPE_ENCAP_NEXT_IP6_LOOKUP] = "ip6-lookup",
    [VXLAN_GPE_ENCAP_NEXT_DROP] = "error-drop",
  },
}

(constructor) VLIB_REGISTER_NODE (vxlan_gpe_encap_node)

Definition at line 392 of file encap.c.