in2out.c File Reference

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Data Structures
struct	snat_in2out_trace_t
struct	snat_in2out_worker_handoff_trace_t

Macros
#define	foreach_snat_in2out_error

Enumerations
enum	snat_in2out_error_t { SNAT_IN2OUT_N_ERROR }
enum	snat_in2out_next_t {   SNAT_IN2OUT_NEXT_LOOKUP, SNAT_IN2OUT_NEXT_DROP, SNAT_IN2OUT_NEXT_ICMP_ERROR, SNAT_IN2OUT_NEXT_SLOW_PATH,   SNAT_IN2OUT_N_NEXT }

Functions
static u8 *	format_snat_in2out_trace (u8 *s, va_list *args)
static u8 *	format_snat_in2out_fast_trace (u8 *s, va_list *args)
static u8 *	format_snat_in2out_worker_handoff_trace (u8 *s, va_list *args)
static int	snat_not_translate_fast (snat_main_t *sm, vlib_node_runtime_t *node, u32 sw_if_index0, ip4_header_t *ip0, u32 proto0, u32 rx_fib_index0)
	Check if packet should be translated. More...
static int	snat_not_translate (snat_main_t *sm, vlib_node_runtime_t *node, u32 sw_if_index0, ip4_header_t *ip0, u32 proto0, u32 rx_fib_index0)
static u32	slow_path (snat_main_t *sm, vlib_buffer_t *b0, ip4_header_t *ip0, u32 rx_fib_index0, snat_session_key_t *key0, snat_session_t **sessionp, vlib_node_runtime_t *node, u32 next0, u32 thread_index)
static_always_inline snat_in2out_error_t	icmp_get_key (ip4_header_t *ip0, snat_session_key_t *p_key0)
u32	icmp_match_in2out_slow (snat_main_t *sm, vlib_node_runtime_t *node, u32 thread_index, vlib_buffer_t *b0, u8 *p_proto, snat_session_key_t *p_value, u8 *p_dont_translate, void *d, void *e)
	Get address and port values to be used for packet SNAT translation and create session if needed. More...
u32	icmp_match_in2out_fast (snat_main_t *sm, vlib_node_runtime_t *node, u32 thread_index, vlib_buffer_t *b0, u8 *p_proto, snat_session_key_t *p_value, u8 *p_dont_translate, void *d, void *e)
	Get address and port values to be used for packet SNAT translation. More...
static u32	icmp_in2out (snat_main_t *sm, vlib_buffer_t *b0, ip4_header_t *ip0, icmp46_header_t *icmp0, u32 sw_if_index0, u32 rx_fib_index0, vlib_node_runtime_t *node, u32 next0, u32 thread_index, void *d, void *e)
static void	snat_hairpinning (snat_main_t *sm, vlib_buffer_t *b0, ip4_header_t *ip0, udp_header_t *udp0, tcp_header_t *tcp0, u32 proto0)
	Hairpinning. More...
static u32	icmp_in2out_slow_path (snat_main_t *sm, vlib_buffer_t *b0, ip4_header_t *ip0, icmp46_header_t *icmp0, u32 sw_if_index0, u32 rx_fib_index0, vlib_node_runtime_t *node, u32 next0, f64 now, u32 thread_index, snat_session_t **p_s0)
static void	snat_in2out_unknown_proto (snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip, u32 rx_fib_index)
static uword	snat_in2out_node_fn_inline (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, int is_slow_path)
static uword	snat_in2out_fast_path_fn (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
	VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_node, snat_in2out_fast_path_fn)
static uword	snat_in2out_slow_path_fn (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
	VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_slowpath_node, snat_in2out_slow_path_fn)
static uword	snat_det_in2out_node_fn (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
	VLIB_NODE_FUNCTION_MULTIARCH (snat_det_in2out_node, snat_det_in2out_node_fn)
u32	icmp_match_in2out_det (snat_main_t *sm, vlib_node_runtime_t *node, u32 thread_index, vlib_buffer_t *b0, u8 *p_proto, snat_session_key_t *p_value, u8 *p_dont_translate, void *d, void *e)
	Get address and port values to be used for packet SNAT translation and create session if needed. More...
static uword	snat_in2out_worker_handoff_fn (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
	VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_worker_handoff_node, snat_in2out_worker_handoff_fn)
static uword	snat_in2out_fast_static_map_fn (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
	VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_fast_node, snat_in2out_fast_static_map_fn)

Variables
vlib_node_registration_t	snat_in2out_node
	(constructor) VLIB_REGISTER_NODE (snat_in2out_node) More...
vlib_node_registration_t	snat_in2out_slowpath_node
	(constructor) VLIB_REGISTER_NODE (snat_in2out_slowpath_node) More...
vlib_node_registration_t	snat_in2out_fast_node
	(constructor) VLIB_REGISTER_NODE (snat_in2out_fast_node) More...
vlib_node_registration_t	snat_in2out_worker_handoff_node
	(constructor) VLIB_REGISTER_NODE (snat_in2out_worker_handoff_node) More...
vlib_node_registration_t	snat_det_in2out_node
	(constructor) VLIB_REGISTER_NODE (snat_det_in2out_node) More...
static char *	snat_in2out_error_strings []

Macro Definition Documentation

#define foreach_snat_in2out_error

Value:

_(UNSUPPORTED_PROTOCOL, "Unsupported protocol")         \
_(IN2OUT_PACKETS, "Good in2out packets processed")      \
_(OUT_OF_PORTS, "Out of ports")                         \
_(BAD_OUTSIDE_FIB, "Outside VRF ID not found")          \
_(BAD_ICMP_TYPE, "unsupported ICMP type")               \
_(NO_TRANSLATION, "No translation")

Definition at line 92 of file in2out.c.

Enumeration Type Documentation

enum snat_in2out_error_t

Enumerator
SNAT_IN2OUT_N_ERROR

Definition at line 100 of file in2out.c.

enum snat_in2out_next_t

Enumerator
SNAT_IN2OUT_NEXT_LOOKUP
SNAT_IN2OUT_NEXT_DROP
SNAT_IN2OUT_NEXT_ICMP_ERROR
SNAT_IN2OUT_NEXT_SLOW_PATH
SNAT_IN2OUT_N_NEXT

Definition at line 113 of file in2out.c.

Function Documentation

static u8* format_snat_in2out_fast_trace ( u8 *  s, va_list *  args  )

static

Definition at line 60 of file in2out.c.

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static u8* format_snat_in2out_trace ( u8 *  s, va_list *  args  )

static

Definition at line 45 of file in2out.c.

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static u8* format_snat_in2out_worker_handoff_trace ( u8 *  s, va_list *  args  )

static

Definition at line 72 of file in2out.c.

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static_always_inline snat_in2out_error_t icmp_get_key	(	ip4_header_t *	ip0,
		snat_session_key_t *	p_key0
	)

Definition at line 419 of file in2out.c.

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static u32 icmp_in2out ( snat_main_t *  sm, vlib_buffer_t *  b0, ip4_header_t *  ip0, icmp46_header_t *  icmp0, u32  sw_if_index0, u32  rx_fib_index0, vlib_node_runtime_t *  node, u32  next0, u32  thread_index, void *  d, void *  e  )

inlinestatic

Definition at line 636 of file in2out.c.

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static u32 icmp_in2out_slow_path ( snat_main_t *  sm, vlib_buffer_t *  b0, ip4_header_t *  ip0, icmp46_header_t *  icmp0, u32  sw_if_index0, u32  rx_fib_index0, vlib_node_runtime_t *  node, u32  next0, f64  now, u32  thread_index, snat_session_t **  p_s0  )

inlinestatic

Definition at line 870 of file in2out.c.

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u32 icmp_match_in2out_det	(	snat_main_t *	sm,
		vlib_node_runtime_t *	node,
		u32	thread_index,
		vlib_buffer_t *	b0,
		u8 *	p_proto,
		snat_session_key_t *	p_value,
		u8 *	p_dont_translate,
		void *	d,
		void *	e
	)

Get address and port values to be used for packet SNAT translation and create session if needed.

Parameters

[in,out]	sm	SNAT main
[in,out]	node	SNAT node runtime
[in]	thread_index	thread index
[in,out]	b0	buffer containing packet to be translated
[out]	p_proto	protocol used for matching
[out]	p_value	address and port after NAT translation
[out]	p_dont_translate	if packet should not be translated
	d	optional parameter
	e	optional parameter

Definition at line 2251 of file in2out.c.

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u32 icmp_match_in2out_fast	(	snat_main_t *	sm,
		vlib_node_runtime_t *	node,
		u32	thread_index,
		vlib_buffer_t *	b0,
		u8 *	p_proto,
		snat_session_key_t *	p_value,
		u8 *	p_dont_translate,
		void *	d,
		void *	e
	)

Get address and port values to be used for packet SNAT translation.

Parameters

[in]	sm	SNAT main
[in,out]	node	SNAT node runtime
[in]	thread_index	thread index
[in,out]	b0	buffer containing packet to be translated
[out]	p_proto	protocol used for matching
[out]	p_value	address and port after NAT translation
[out]	p_dont_translate	if packet should not be translated
	d	optional parameter
	e	optional parameter

Definition at line 569 of file in2out.c.

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u32 icmp_match_in2out_slow	(	snat_main_t *	sm,
		vlib_node_runtime_t *	node,
		u32	thread_index,
		vlib_buffer_t *	b0,
		u8 *	p_proto,
		snat_session_key_t *	p_value,
		u8 *	p_dont_translate,
		void *	d,
		void *	e
	)

Get address and port values to be used for packet SNAT translation and create session if needed.

Parameters

[in,out]	sm	SNAT main
[in,out]	node	SNAT node runtime
[in]	thread_index	thread index
[in,out]	b0	buffer containing packet to be translated
[out]	p_proto	protocol used for matching
[out]	p_value	address and port after NAT translation
[out]	p_dont_translate	if packet should not be translated
	d	optional parameter
	e	optional parameter

Definition at line 477 of file in2out.c.

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static u32 slow_path ( snat_main_t *  sm, vlib_buffer_t *  b0, ip4_header_t *  ip0, u32  rx_fib_index0, snat_session_key_t *  key0, snat_session_t **  sessionp, vlib_node_runtime_t *  node, u32  next0, u32  thread_index  )

static

Definition at line 207 of file in2out.c.

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static uword snat_det_in2out_node_fn ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame  )

static

Definition at line 1642 of file in2out.c.

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static void snat_hairpinning ( snat_main_t *  sm, vlib_buffer_t *  b0, ip4_header_t *  ip0, udp_header_t *  udp0, tcp_header_t *  tcp0, u32  proto0  )

inlinestatic

Hairpinning.

Hairpinning allows two endpoints on the internal side of the NAT to communicate even if they only use each other's external IP addresses and ports.

Parameters

sm	SNAT main.
b0	Vlib buffer.
ip0	IP header.
udp0	UDP header.
tcp0	TCP header.
proto0	SNAT protocol.

Definition at line 773 of file in2out.c.

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static uword snat_in2out_fast_path_fn ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame  )

static

Definition at line 1573 of file in2out.c.

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static uword snat_in2out_fast_static_map_fn ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame  )

static

Definition at line 2559 of file in2out.c.

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static uword snat_in2out_node_fn_inline ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame, int  is_slow_path  )

inlinestatic

Definition at line 1020 of file in2out.c.

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static uword snat_in2out_slow_path_fn ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame  )

static

Definition at line 1606 of file in2out.c.

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static void snat_in2out_unknown_proto ( snat_main_t *  sm, vlib_buffer_t *  b, ip4_header_t *  ip, u32  rx_fib_index  )

static

Definition at line 971 of file in2out.c.

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static uword snat_in2out_worker_handoff_fn ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame  )

static

Definition at line 2399 of file in2out.c.

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static int snat_not_translate ( snat_main_t *  sm, vlib_node_runtime_t *  node, u32  sw_if_index0, ip4_header_t *  ip0, u32  proto0, u32  rx_fib_index0  )

inlinestatic

Definition at line 178 of file in2out.c.

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static int snat_not_translate_fast ( snat_main_t *  sm, vlib_node_runtime_t *  node, u32  sw_if_index0, ip4_header_t *  ip0, u32  proto0, u32  rx_fib_index0  )

inlinestatic

Check if packet should be translated.

Packets aimed at outside interface and external addresss with active session should be translated.

Parameters

sm	SNAT main
rt	SNAT runtime data
sw_if_index0	index of the inside interface
ip0	IPv4 header
proto0	SNAT protocol
rx_fib_index0	RX FIB index

Returns

0 if packet should be translated otherwise 1

Definition at line 137 of file in2out.c.

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VLIB_NODE_FUNCTION_MULTIARCH	(	snat_in2out_node	,
		snat_in2out_fast_path_fn
	)

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VLIB_NODE_FUNCTION_MULTIARCH	(	snat_in2out_slowpath_node	,
		snat_in2out_slow_path_fn
	)

VLIB_NODE_FUNCTION_MULTIARCH	(	snat_det_in2out_node	,
		snat_det_in2out_node_fn
	)

VLIB_NODE_FUNCTION_MULTIARCH	(	snat_in2out_worker_handoff_node	,
		snat_in2out_worker_handoff_fn
	)

VLIB_NODE_FUNCTION_MULTIARCH	(	snat_in2out_fast_node	,
		snat_in2out_fast_static_map_fn
	)

Variable Documentation

vlib_node_registration_t snat_det_in2out_node

Initial value:

= {
  .function = snat_det_in2out_node_fn,
  .name = "snat-det-in2out",
  .vector_size = sizeof (u32),
  .format_trace = format_snat_in2out_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,

  .n_errors = ARRAY_LEN(snat_in2out_error_strings),
  .error_strings = snat_in2out_error_strings,

  .runtime_data_bytes = sizeof (snat_runtime_t),

  .n_next_nodes = 3,

  
  .next_nodes = {
    [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
    [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
    [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
  },
}

(constructor) VLIB_REGISTER_NODE (snat_det_in2out_node)

Definition at line 90 of file in2out.c.

char* snat_in2out_error_strings[]

static

Initial value:

= {
#define _(sym,string) 
  foreach_snat_in2out_error

}

Definition at line 107 of file in2out.c.

vlib_node_registration_t snat_in2out_fast_node

Initial value:

= {
  .function = snat_in2out_fast_static_map_fn,
  .name = "snat-in2out-fast",
  .vector_size = sizeof (u32),
  .format_trace = format_snat_in2out_fast_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  
  .n_errors = ARRAY_LEN(snat_in2out_error_strings),
  .error_strings = snat_in2out_error_strings,

  .runtime_data_bytes = sizeof (snat_runtime_t),
  
  .n_next_nodes = SNAT_IN2OUT_N_NEXT,

  
  .next_nodes = {
    [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
    [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
    [SNAT_IN2OUT_NEXT_SLOW_PATH] = "snat-in2out-slowpath",
    [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
  },
}

(constructor) VLIB_REGISTER_NODE (snat_in2out_fast_node)

Definition at line 88 of file in2out.c.

vlib_node_registration_t snat_in2out_node

Initial value:

= {
  .function = snat_in2out_fast_path_fn,
  .name = "snat-in2out",
  .vector_size = sizeof (u32),
  .format_trace = format_snat_in2out_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  
  .n_errors = ARRAY_LEN(snat_in2out_error_strings),
  .error_strings = snat_in2out_error_strings,

  .runtime_data_bytes = sizeof (snat_runtime_t),
  
  .n_next_nodes = SNAT_IN2OUT_N_NEXT,

  
  .next_nodes = {
    [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
    [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
    [SNAT_IN2OUT_NEXT_SLOW_PATH] = "snat-in2out-slowpath",
    [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
  },
}

(constructor) VLIB_REGISTER_NODE (snat_in2out_node)

Definition at line 86 of file in2out.c.

vlib_node_registration_t snat_in2out_slowpath_node

Initial value:

= {
  .function = snat_in2out_slow_path_fn,
  .name = "snat-in2out-slowpath",
  .vector_size = sizeof (u32),
  .format_trace = format_snat_in2out_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  
  .n_errors = ARRAY_LEN(snat_in2out_error_strings),
  .error_strings = snat_in2out_error_strings,

  .runtime_data_bytes = sizeof (snat_runtime_t),
  
  .n_next_nodes = SNAT_IN2OUT_N_NEXT,

  
  .next_nodes = {
    [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
    [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
    [SNAT_IN2OUT_NEXT_SLOW_PATH] = "snat-in2out-slowpath",
    [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
  },
}

(constructor) VLIB_REGISTER_NODE (snat_in2out_slowpath_node)

Definition at line 87 of file in2out.c.

vlib_node_registration_t snat_in2out_worker_handoff_node

Initial value:

= {
  .function = snat_in2out_worker_handoff_fn,
  .name = "snat-in2out-worker-handoff",
  .vector_size = sizeof (u32),
  .format_trace = format_snat_in2out_worker_handoff_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  
  .n_next_nodes = 1,

  .next_nodes = {
    [0] = "error-drop",
  },
}

(constructor) VLIB_REGISTER_NODE (snat_in2out_worker_handoff_node)

Definition at line 89 of file in2out.c.