out2in.c File Reference

NAT44 endpoint-dependent outside to inside network translation. More...

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Data Structures
struct	snat_out2in_trace_t

Macros
#define	foreach_snat_out2in_error

Enumerations
enum	snat_out2in_error_t { SNAT_OUT2IN_N_ERROR }
enum	snat_out2in_next_t { SNAT_OUT2IN_NEXT_DROP, SNAT_OUT2IN_NEXT_LOOKUP, SNAT_OUT2IN_NEXT_ICMP_ERROR, SNAT_OUT2IN_N_NEXT }

Functions
static u8 *	format_snat_out2in_trace (u8 *s, va_list *args)
static u8 *	format_snat_out2in_fast_trace (u8 *s, va_list *args)
int	nat44_o2i_is_idle_session_cb (clib_bihash_kv_8_8_t *kv, void *arg)
static snat_session_t *	create_session_for_static_mapping (snat_main_t *sm, vlib_buffer_t *b0, ip4_address_t i2o_addr, u16 i2o_port, u32 i2o_fib_index, ip4_address_t o2i_addr, u16 o2i_port, u32 o2i_fib_index, nat_protocol_t proto, vlib_node_runtime_t *node, u32 thread_index, f64 now)
	Create session for static mapping. More...
static_always_inline snat_out2in_error_t	icmp_get_key (vlib_buffer_t *b, ip4_header_t *ip0, ip4_address_t *addr, u16 *port, nat_protocol_t *nat_proto)
u32	icmp_match_out2in_slow (snat_main_t *sm, vlib_node_runtime_t *node, u32 thread_index, vlib_buffer_t *b0, ip4_header_t *ip0, ip4_address_t *addr, u16 *port, u32 *fib_index, nat_protocol_t *proto, void *d, void *e, u8 *dont_translate)
	Get address and port values to be used for ICMP packet translation and create session if needed. More...
u32	icmp_match_out2in_fast (snat_main_t *sm, vlib_node_runtime_t *node, u32 thread_index, vlib_buffer_t *b0, ip4_header_t *ip0, ip4_address_t *mapping_addr, u16 *mapping_port, u32 *mapping_fib_index, nat_protocol_t *proto, void *d, void *e, u8 *dont_translate)
	Get address and port values to be used for ICMP packet translation. More...
u32	icmp_out2in (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 u32	icmp_out2in_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 int	nat_out2in_sm_unknown_proto (snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip, u32 rx_fib_index)
VLIB_NODE_FN()	snat_out2in_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
VLIB_NODE_FN()	snat_out2in_fast_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)

Variables
static char *	snat_out2in_error_strings []
vlib_node_registration_t	snat_out2in_node
	(constructor) VLIB_REGISTER_NODE (snat_out2in_node) More...
vlib_node_registration_t	snat_out2in_fast_node
	(constructor) VLIB_REGISTER_NODE (snat_out2in_fast_node) More...

Detailed Description

NAT44 endpoint-dependent outside to inside network translation.

Definition in file out2in.c.

Macro Definition Documentation

foreach_snat_out2in_error

#define foreach_snat_out2in_error

Value:

_(UNSUPPORTED_PROTOCOL, "unsupported protocol")         \
_(OUT_OF_PORTS, "out of ports")                         \
_(BAD_ICMP_TYPE, "unsupported ICMP type")               \
_(NO_TRANSLATION, "no translation")                     \
_(MAX_SESSIONS_EXCEEDED, "maximum sessions exceeded")   \
_(CANNOT_CREATE_USER, "cannot create NAT user")

Definition at line 72 of file out2in.c.

Enumeration Type Documentation

snat_out2in_error_t

enum snat_out2in_error_t

Enumerator
SNAT_OUT2IN_N_ERROR

Definition at line 80 of file out2in.c.

snat_out2in_next_t

enum snat_out2in_next_t

Enumerator
SNAT_OUT2IN_NEXT_DROP
SNAT_OUT2IN_NEXT_LOOKUP
SNAT_OUT2IN_NEXT_ICMP_ERROR
SNAT_OUT2IN_N_NEXT

Definition at line 94 of file out2in.c.

Function Documentation

create_session_for_static_mapping()

static snat_session_t* create_session_for_static_mapping ( snat_main_t *  sm, vlib_buffer_t *  b0, ip4_address_t  i2o_addr, u16  i2o_port, u32  i2o_fib_index, ip4_address_t  o2i_addr, u16  o2i_port, u32  o2i_fib_index, nat_protocol_t  proto, vlib_node_runtime_t *  node, u32  thread_index, f64  now  )

inlinestatic

Create session for static mapping.

Create NAT session initiated by host from external network with static mapping.

Parameters

sm	NAT main.
b0	Vlib buffer.
in2out	In2out NAT44 session key.
out2in	Out2in NAT44 session key.
node	Vlib node.

Returns

SNAT session if successfully created otherwise 0.

Definition at line 166 of file out2in.c.

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format_snat_out2in_fast_trace()

static u8* format_snat_out2in_fast_trace ( u8 *  s, va_list *  args  )

static

Definition at line 61 of file out2in.c.

format_snat_out2in_trace()

static u8* format_snat_out2in_trace ( u8 *  s, va_list *  args  )

static

Definition at line 47 of file out2in.c.

icmp_get_key()

static_always_inline snat_out2in_error_t icmp_get_key	(	vlib_buffer_t *	b,
		ip4_header_t *	ip0,
		ip4_address_t *	addr,
		u16 *	port,
		nat_protocol_t *	nat_proto
	)

Definition at line 259 of file out2in.c.

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icmp_match_out2in_fast()

u32 icmp_match_out2in_fast	(	snat_main_t *	sm,
		vlib_node_runtime_t *	node,
		u32	thread_index,
		vlib_buffer_t *	b0,
		ip4_header_t *	ip0,
		ip4_address_t *	mapping_addr,
		u16 *	mapping_port,
		u32 *	mapping_fib_index,
		nat_protocol_t *	proto,
		void *	d,
		void *	e,
		u8 *	dont_translate
	)

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

Parameters

[in]	sm	NAT main
[in,out]	node	NAT node runtime
[in]	thread_index	thread index
[in,out]	b0	buffer containing packet to be translated
[in,out]	ip0	ip header
[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 459 of file out2in.c.

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icmp_match_out2in_slow()

u32 icmp_match_out2in_slow	(	snat_main_t *	sm,
		vlib_node_runtime_t *	node,
		u32	thread_index,
		vlib_buffer_t *	b0,
		ip4_header_t *	ip0,
		ip4_address_t *	addr,
		u16 *	port,
		u32 *	fib_index,
		nat_protocol_t *	proto,
		void *	d,
		void *	e,
		u8 *	dont_translate
	)

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

Parameters

[in,out]	sm	NAT main
[in,out]	node	NAT node runtime
[in]	thread_index	thread index
[in,out]	b0	buffer containing packet to be translated
[in,out]	ip0	ip header
[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 318 of file out2in.c.

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icmp_out2in()

u32 icmp_out2in	(	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
	)

Definition at line 519 of file out2in.c.

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icmp_out2in_slow_path()

static u32 icmp_out2in_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 660 of file out2in.c.

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nat44_o2i_is_idle_session_cb()

int nat44_o2i_is_idle_session_cb	(	clib_bihash_kv_8_8_t *	kv,
		void *	arg
	)

Definition at line 104 of file out2in.c.

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nat_out2in_sm_unknown_proto()

static int nat_out2in_sm_unknown_proto ( snat_main_t *  sm, vlib_buffer_t *  b, ip4_header_t *  ip, u32  rx_fib_index  )

static

Definition at line 688 of file out2in.c.

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snat_out2in_fast_node()

VLIB_NODE_FN() snat_out2in_fast_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

Definition at line 1396 of file out2in.c.

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snat_out2in_node()

VLIB_NODE_FN() snat_out2in_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

Definition at line 713 of file out2in.c.

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Variable Documentation

snat_out2in_error_strings

char* snat_out2in_error_strings[]

static

Initial value:

= {
#define _(sym,string) 
  foreach_snat_out2in_error

}

Definition at line 88 of file out2in.c.

snat_out2in_fast_node

vlib_node_registration_t snat_out2in_fast_node

Initial value:

= {
  .name = "nat44-out2in-fast",
  .vector_size = sizeof (u32),
  .format_trace = format_snat_out2in_fast_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,

  .n_errors = ARRAY_LEN(snat_out2in_error_strings),
  .error_strings = snat_out2in_error_strings,

  .runtime_data_bytes = sizeof (snat_runtime_t),

  .n_next_nodes = SNAT_OUT2IN_N_NEXT,

  
  .next_nodes = {
    [SNAT_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
    [SNAT_OUT2IN_NEXT_DROP] = "error-drop",
    [SNAT_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
  },
}

(constructor) VLIB_REGISTER_NODE (snat_out2in_fast_node)

Definition at line 1557 of file out2in.c.

snat_out2in_node

vlib_node_registration_t snat_out2in_node

Initial value:

= {
  .name = "nat44-out2in",
  .vector_size = sizeof (u32),
  .format_trace = format_snat_out2in_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,

  .n_errors = ARRAY_LEN(snat_out2in_error_strings),
  .error_strings = snat_out2in_error_strings,

  .runtime_data_bytes = sizeof (snat_runtime_t),

  .n_next_nodes = SNAT_OUT2IN_N_NEXT,

  
  .next_nodes = {
    [SNAT_OUT2IN_NEXT_DROP] = "error-drop",
    [SNAT_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
    [SNAT_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
  },
}

(constructor) VLIB_REGISTER_NODE (snat_out2in_node)

Definition at line 1374 of file out2in.c.