nat.h File Reference

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Data Structures
struct	snat_session_key_t
struct	nat_ed_ses_key_t
struct	snat_det_out_key_t
struct	snat_user_key_t
struct	snat_user_t
struct	snat_address_t
struct	snat_det_session_t
struct	snat_det_map_t
struct	nat44_lb_addr_port_t
struct	snat_static_mapping_t
struct	snat_interface_t
struct	snat_static_map_resolve_t
struct	snat_main_per_thread_data_t
struct	snat_main_s
struct	snat_runtime_t
struct	icmp_echo_header_t
struct	tcp_udp_header_t

Macros
#define	SNAT_UDP_TIMEOUT   300
#define	SNAT_UDP_TIMEOUT_MIN   120
#define	SNAT_TCP_TRANSITORY_TIMEOUT   240
#define	SNAT_TCP_ESTABLISHED_TIMEOUT   7440
#define	SNAT_TCP_INCOMING_SYN   6
#define	SNAT_ICMP_TIMEOUT   60
#define	SNAT_FLAG_HAIRPINNING   (1 << 0)
#define	foreach_snat_protocol
#define	foreach_snat_session_state
#define	SNAT_SESSION_FLAG_STATIC_MAPPING   1
#define	SNAT_SESSION_FLAG_UNKNOWN_PROTO   2
#define	SNAT_SESSION_FLAG_LOAD_BALANCING   4
#define	SNAT_SESSION_FLAG_TWICE_NAT   8
#define	NAT_INTERFACE_FLAG_IS_INSIDE   1
#define	NAT_INTERFACE_FLAG_IS_OUTSIDE   2
#define	snat_is_session_static(s)   (s->flags & SNAT_SESSION_FLAG_STATIC_MAPPING)
	Check if SNAT session is created from static mapping. More...
#define	snat_is_unk_proto_session(s)   (s->flags & SNAT_SESSION_FLAG_UNKNOWN_PROTO)
	Check if SNAT session for unknown protocol. More...
#define	is_twice_nat_session(s)   (s->flags & SNAT_SESSION_FLAG_TWICE_NAT)
	Check if NAT session is twice NAT. More...
#define	is_lb_session(s)   (s->flags & SNAT_SESSION_FLAG_LOAD_BALANCING)
	Check if NAT session is load-balancing. More...
#define	is_ed_session(s)   (snat_is_unk_proto_session (s) || is_twice_nat_session (s) || is_lb_session (s))
	Check if NAT session is endpoint dependent. More...
#define	nat_interface_is_inside(i)   i->flags & NAT_INTERFACE_FLAG_IS_INSIDE
#define	nat_interface_is_outside(i)   i->flags & NAT_INTERFACE_FLAG_IS_OUTSIDE

Typedefs
typedef u32	snat_icmp_match_function_t(struct snat_main_s *sm, vlib_node_runtime_t *node, u32 thread_index, vlib_buffer_t *b0, ip4_header_t *ip0, u8 *p_proto, snat_session_key_t *p_value, u8 *p_dont_translate, void *d, void *e)
typedef u32(	snat_get_worker_function_t) (ip4_header_t *ip, u32 rx_fib_index)
typedef int	nat_alloc_out_addr_and_port_function_t(snat_address_t *addresses, u32 fib_index, u32 thread_index, snat_session_key_t *k, u32 *address_indexp, u16 port_per_thread, u32 snat_thread_index)
typedef struct snat_main_s	snat_main_t

Enumerations
enum	snat_protocol_t { foreach_snat_protocol }
enum	snat_session_state_t { foreach_snat_session_state }

Functions
typedef	CLIB_PACKED (struct{snat_session_key_t out2in;snat_session_key_t in2out;u32 flags;u32 per_user_index;u32 per_user_list_head_index;f64 last_heard;u64 total_bytes;u32 total_pkts;u32 outside_address_index;ip4_address_t ext_host_addr;u16 ext_host_port;ip4_address_t ext_host_nat_addr;u16 ext_host_nat_port;}) snat_session_t
void	snat_free_outside_address_and_port (snat_address_t *addresses, u32 thread_index, snat_session_key_t *k, u32 address_index)
int	snat_alloc_outside_address_and_port (snat_address_t *addresses, u32 fib_index, u32 thread_index, snat_session_key_t *k, u32 *address_indexp, u16 port_per_thread, u32 snat_thread_index)
int	snat_static_mapping_match (snat_main_t *sm, snat_session_key_t match, snat_session_key_t *mapping, u8 by_external, u8 *is_addr_only, u8 *twice_nat)
	Match NAT44 static mapping. More...
void	snat_add_del_addr_to_fib (ip4_address_t *addr, u8 p_len, u32 sw_if_index, int is_add)
	Add/del NAT address to FIB. More...
static u32	ip_proto_to_snat_proto (u8 ip_proto)
static u8	snat_proto_to_ip_proto (snat_protocol_t snat_proto)
u32	icmp_match_in2out_fast (snat_main_t *sm, vlib_node_runtime_t *node, u32 thread_index, vlib_buffer_t *b0, ip4_header_t *ip0, 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 ICMP packet translation. More...
u32	icmp_match_in2out_slow (snat_main_t *sm, vlib_node_runtime_t *node, u32 thread_index, vlib_buffer_t *b0, ip4_header_t *ip0, 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 ICMP packet translation and create session if needed. More...
u32	icmp_match_in2out_det (snat_main_t *sm, vlib_node_runtime_t *node, u32 thread_index, vlib_buffer_t *b0, ip4_header_t *ip0, 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 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, 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 ICMP packet translation. More...
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, 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 ICMP packet translation and create session if needed. More...
u32	icmp_match_out2in_det (snat_main_t *sm, vlib_node_runtime_t *node, u32 thread_index, vlib_buffer_t *b0, ip4_header_t *ip0, 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 ICMP packet translation and create session if needed. More...
void	increment_v4_address (ip4_address_t *a)
void	snat_add_address (snat_main_t *sm, ip4_address_t *addr, u32 vrf_id, u8 twice_nat)
int	snat_del_address (snat_main_t *sm, ip4_address_t addr, u8 delete_sm, u8 twice_nat)
void	nat44_add_del_address_dpo (ip4_address_t addr, u8 is_add)
int	snat_add_static_mapping (ip4_address_t l_addr, ip4_address_t e_addr, u16 l_port, u16 e_port, u32 vrf_id, int addr_only, u32 sw_if_index, snat_protocol_t proto, int is_add, u8 twice_nat, u8 out2in_only, u8 *tag)
	Add static mapping. More...
clib_error_t *	snat_api_init (vlib_main_t *vm, snat_main_t *sm)
int	snat_set_workers (uword *bitmap)
int	snat_interface_add_del (u32 sw_if_index, u8 is_inside, int is_del)
int	snat_interface_add_del_output_feature (u32 sw_if_index, u8 is_inside, int is_del)
int	snat_add_interface_address (snat_main_t *sm, u32 sw_if_index, int is_del, u8 twice_nat)
uword	unformat_snat_protocol (unformat_input_t *input, va_list *args)
u8 *	format_snat_protocol (u8 *s, va_list *args)
int	nat44_add_del_lb_static_mapping (ip4_address_t e_addr, u16 e_port, snat_protocol_t proto, u32 vrf_id, nat44_lb_addr_port_t *locals, u8 is_add, u8 twice_nat, u8 out2in_only, u8 *tag)
int	nat44_del_session (snat_main_t *sm, ip4_address_t *addr, u16 port, snat_protocol_t proto, u32 vrf_id, int is_in)
void	nat_free_session_data (snat_main_t *sm, snat_session_t *s, u32 thread_index)
snat_user_t *	nat_user_get_or_create (snat_main_t *sm, ip4_address_t *addr, u32 fib_index, u32 thread_index)
snat_session_t *	nat_session_alloc_or_recycle (snat_main_t *sm, snat_user_t *u, u32 thread_index)
void	nat_set_alloc_addr_and_port_mape (u16 psid, u16 psid_offset, u16 psid_length)
void	nat_set_alloc_addr_and_port_default (void)
static_always_inline u8	icmp_is_error_message (icmp46_header_t *icmp)
static_always_inline u8	is_interface_addr (snat_main_t *sm, vlib_node_runtime_t *node, u32 sw_if_index0, u32 ip4_addr)
static u8	maximum_sessions_exceeded (snat_main_t *sm, u32 thread_index)
static_always_inline void	nat_send_all_to_node (vlib_main_t *vm, u32 *bi_vector, vlib_node_runtime_t *node, vlib_error_t *error, u32 next)
static void	user_session_increment (snat_main_t *sm, snat_user_t *u, u8 is_static)

Variables
snat_main_t	snat_main
vlib_node_registration_t	snat_in2out_node
	(constructor) VLIB_REGISTER_NODE (snat_in2out_node) More...
vlib_node_registration_t	snat_in2out_output_node
	(constructor) VLIB_REGISTER_NODE (snat_in2out_output_node) More...
vlib_node_registration_t	snat_out2in_node
	(constructor) VLIB_REGISTER_NODE (snat_out2in_node) More...
vlib_node_registration_t	snat_in2out_fast_node
	(constructor) VLIB_REGISTER_NODE (snat_in2out_fast_node) More...
vlib_node_registration_t	snat_out2in_fast_node
	(constructor) VLIB_REGISTER_NODE (snat_out2in_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_in2out_output_worker_handoff_node
	(constructor) VLIB_REGISTER_NODE (snat_in2out_output_worker_handoff_node) More...
vlib_node_registration_t	snat_out2in_worker_handoff_node
	(constructor) VLIB_REGISTER_NODE (snat_out2in_worker_handoff_node) More...
vlib_node_registration_t	snat_det_in2out_node
	(constructor) VLIB_REGISTER_NODE (snat_det_in2out_node) More...
vlib_node_registration_t	snat_det_out2in_node
	(constructor) VLIB_REGISTER_NODE (snat_det_out2in_node) More...
vlib_node_registration_t	snat_hairpin_dst_node
	(constructor) VLIB_REGISTER_NODE (snat_hairpin_dst_node) More...
vlib_node_registration_t	snat_hairpin_src_node
	(constructor) VLIB_REGISTER_NODE (snat_hairpin_src_node) More...
format_function_t	format_snat_user
format_function_t	format_snat_static_mapping
format_function_t	format_snat_static_map_to_resolve
format_function_t	format_det_map_ses

Macro Definition Documentation

#define foreach_snat_protocol

Value:

_(UDP, 0, udp, "udp")       \
  _(TCP, 1, tcp, "tcp")       \
  _(ICMP, 2, icmp, "icmp")

Definition at line 99 of file nat.h.

#define foreach_snat_session_state

Value:

_(0, UNKNOWN, "unknown")                 \
  _(1, UDP_ACTIVE, "udp-active")           \
  _(2, TCP_SYN_SENT, "tcp-syn-sent")       \
  _(3, TCP_ESTABLISHED, "tcp-established") \
  _(4, TCP_FIN_WAIT, "tcp-fin-wait")       \
  _(5, TCP_CLOSE_WAIT, "tcp-close-wait")   \
  _(6, TCP_LAST_ACK, "tcp-last-ack")       \
  _(7, ICMP_ACTIVE, "icmp-active")

Definition at line 111 of file nat.h.

#define is_ed_session

(

s

)

(snat_is_unk_proto_session (s) || is_twice_nat_session (s) || is_lb_session (s))

Check if NAT session is endpoint dependent.

Parameters

s	NAT session

Returns

1 if NAT session is endpoint dependent

Definition at line 469 of file nat.h.

#define is_lb_session

(

s

)

(s->flags & SNAT_SESSION_FLAG_LOAD_BALANCING)

Check if NAT session is load-balancing.

Parameters

s	NAT session

Returns

1 if NAT session is load-balancing

Definition at line 463 of file nat.h.

#define is_twice_nat_session

(

s

)

(s->flags & SNAT_SESSION_FLAG_TWICE_NAT)

Check if NAT session is twice NAT.

Parameters

s	NAT session

Returns

1 if NAT session is twice NAT

Definition at line 457 of file nat.h.

#define NAT_INTERFACE_FLAG_IS_INSIDE   1

Definition at line 133 of file nat.h.

#define NAT_INTERFACE_FLAG_IS_OUTSIDE   2

Definition at line 134 of file nat.h.

#define nat_interface_is_inside

(

i

)

i->flags & NAT_INTERFACE_FLAG_IS_INSIDE

Definition at line 471 of file nat.h.

#define nat_interface_is_outside

(

i

)

i->flags & NAT_INTERFACE_FLAG_IS_OUTSIDE

Definition at line 472 of file nat.h.

#define SNAT_FLAG_HAIRPINNING   (1 << 0)

Definition at line 40 of file nat.h.

#define SNAT_ICMP_TIMEOUT   60

Definition at line 38 of file nat.h.

#define snat_is_session_static

(

s

)

(s->flags & SNAT_SESSION_FLAG_STATIC_MAPPING)

Check if SNAT session is created from static mapping.

Parameters

s	SNAT session

Returns

1 if SNAT session is created from static mapping otherwise 0

Definition at line 445 of file nat.h.

#define snat_is_unk_proto_session

(

s

)

(s->flags & SNAT_SESSION_FLAG_UNKNOWN_PROTO)

Check if SNAT session for unknown protocol.

Parameters

s	SNAT session

Returns

1 if SNAT session for unknown protocol otherwise 0

Definition at line 451 of file nat.h.

#define SNAT_SESSION_FLAG_LOAD_BALANCING   4

Definition at line 130 of file nat.h.

#define SNAT_SESSION_FLAG_STATIC_MAPPING   1

Definition at line 128 of file nat.h.

#define SNAT_SESSION_FLAG_TWICE_NAT   8

Definition at line 131 of file nat.h.

#define SNAT_SESSION_FLAG_UNKNOWN_PROTO   2

Definition at line 129 of file nat.h.

#define SNAT_TCP_ESTABLISHED_TIMEOUT   7440

Definition at line 36 of file nat.h.

#define SNAT_TCP_INCOMING_SYN   6

Definition at line 37 of file nat.h.

#define SNAT_TCP_TRANSITORY_TIMEOUT   240

Definition at line 35 of file nat.h.

#define SNAT_UDP_TIMEOUT   300

Definition at line 33 of file nat.h.

#define SNAT_UDP_TIMEOUT_MIN   120

Definition at line 34 of file nat.h.

Typedef Documentation

typedef int nat_alloc_out_addr_and_port_function_t(snat_address_t *addresses, u32 fib_index, u32 thread_index, snat_session_key_t *k, u32 *address_indexp, u16 port_per_thread, u32 snat_thread_index)

Definition at line 282 of file nat.h.

typedef u32( snat_get_worker_function_t) (ip4_header_t *ip, u32 rx_fib_index)

Definition at line 280 of file nat.h.

typedef u32 snat_icmp_match_function_t(struct snat_main_s *sm, vlib_node_runtime_t *node, u32 thread_index, vlib_buffer_t *b0, ip4_header_t *ip0, u8 *p_proto, snat_session_key_t *p_value, u8 *p_dont_translate, void *d, void *e)

Definition at line 269 of file nat.h.

typedef struct snat_main_s snat_main_t

Enumeration Type Documentation

enum snat_protocol_t

Enumerator
foreach_snat_protocol

Definition at line 104 of file nat.h.

enum snat_session_state_t

Enumerator
foreach_snat_session_state

Definition at line 121 of file nat.h.

Function Documentation

typedef CLIB_PACKED

(

struct{snat_session_key_t out2in;snat_session_key_t in2out;u32 flags;u32 per_user_index;u32 per_user_list_head_index;f64 last_heard;u64 total_bytes;u32 total_pkts;u32 outside_address_index;ip4_address_t ext_host_addr;u16 ext_host_port;ip4_address_t ext_host_nat_addr;u16 ext_host_nat_port;}

)

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

Definition at line 2255 of file nat.c.

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static_always_inline u8 icmp_is_error_message

(

icmp46_header_t *

icmp

)

Definition at line 580 of file nat.h.

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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,
		ip4_header_t *	ip0,
		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 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
[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 3372 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,
		ip4_header_t *	ip0,
		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 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
[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 677 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,
		ip4_header_t *	ip0,
		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 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
[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 547 of file in2out.c.

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u32 icmp_match_out2in_det	(	snat_main_t *	sm,
		vlib_node_runtime_t *	node,
		u32	thread_index,
		vlib_buffer_t *	b0,
		ip4_header_t *	ip0,
		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 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
[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 2514 of file out2in.c.

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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,
		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 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
[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 536 of file out2in.c.

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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,
		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 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
[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 386 of file out2in.c.

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void increment_v4_address

(

ip4_address_t *

a

)

Definition at line 610 of file nat.c.

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static u32 ip_proto_to_snat_proto ( u8  ip_proto )

inlinestatic

Definition at line 486 of file nat.h.

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static_always_inline u8 is_interface_addr	(	snat_main_t *	sm,
		vlib_node_runtime_t *	node,
		u32	sw_if_index0,
		u32	ip4_addr
	)

Definition at line 596 of file nat.h.

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static u8 maximum_sessions_exceeded ( snat_main_t *  sm, u32  thread_index  )

inlinestatic

Definition at line 621 of file nat.h.

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void nat44_add_del_address_dpo	(	ip4_address_t	addr,
		u8	is_add
	)

Definition at line 2218 of file nat.c.

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int nat44_add_del_lb_static_mapping	(	ip4_address_t	e_addr,
		u16	e_port,
		snat_protocol_t	proto,
		u32	vrf_id,
		nat44_lb_addr_port_t *	locals,
		u8	is_add,
		u8	twice_nat,
		u8	out2in_only,
		u8 *	tag
	)

Definition at line 1141 of file nat.c.

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int nat44_del_session	(	snat_main_t *	sm,
		ip4_address_t *	addr,
		u16	port,
		snat_protocol_t	proto,
		u32	vrf_id,
		int	is_in
	)

Definition at line 3014 of file nat.c.

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void nat_free_session_data	(	snat_main_t *	sm,
		snat_session_t *	s,
		u32	thread_index
	)

Definition at line 144 of file nat.c.

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static_always_inline void nat_send_all_to_node	(	vlib_main_t *	vm,
		u32 *	bi_vector,
		vlib_node_runtime_t *	node,
		vlib_error_t *	error,
		u32	next
	)

Definition at line 630 of file nat.h.

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snat_session_t* nat_session_alloc_or_recycle	(	snat_main_t *	sm,
		snat_user_t *	u,
		u32	thread_index
	)

Definition at line 285 of file nat.c.

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void nat_set_alloc_addr_and_port_default

(

void

)

Definition at line 3076 of file nat.c.

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void nat_set_alloc_addr_and_port_mape	(	u16	psid,
		u16	psid_offset,
		u16	psid_length
	)

Definition at line 3065 of file nat.c.

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snat_user_t* nat_user_get_or_create	(	snat_main_t *	sm,
		ip4_address_t *	addr,
		u32	fib_index,
		u32	thread_index
	)

Definition at line 241 of file nat.c.

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void snat_add_address	(	snat_main_t *	sm,
		ip4_address_t *	addr,
		u32	vrf_id,
		u8	twice_nat
	)

Definition at line 542 of file nat.c.

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void snat_add_del_addr_to_fib	(	ip4_address_t *	addr,
		u8	p_len,
		u32	sw_if_index,
		int	is_add
	)

Add/del NAT address to FIB.

Add the external NAT address to the FIB as receive entries. This ensures that VPP will reply to ARP for this address and we don't need to enable proxy ARP on the outside interface.

Parameters

addr	IPv4 address.
plen	address prefix length
sw_if_index	Interface.
is_add	If 0 delete, otherwise add.

Definition at line 510 of file nat.c.

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int snat_add_interface_address	(	snat_main_t *	sm,
		u32	sw_if_index,
		int	is_del,
		u8	twice_nat
	)

Definition at line 2947 of file nat.c.

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int snat_add_static_mapping	(	ip4_address_t	l_addr,
		ip4_address_t	e_addr,
		u16	l_port,
		u16	e_port,
		u32	vrf_id,
		int	addr_only,
		u32	sw_if_index,
		snat_protocol_t	proto,
		int	is_add,
		u8	twice_nat,
		u8	out2in_only,
		u8 *	tag
	)

Add static mapping.

Create static mapping between local addr+port and external addr+port.

Parameters

l_addr	Local IPv4 address.
e_addr	External IPv4 address.
l_port	Local port number.
e_port	External port number.
vrf_id	VRF ID.
addr_only	If 0 address port and pair mapping, otherwise address only.
sw_if_index	External port instead of specific IP address.
is_add	If 0 delete static mapping, otherwise add.
twice_nat	If 1 translate external host address and port.
out2in_only	If 1 rule match only out2in direction
tag	- opaque string tag

Returns

Definition at line 663 of file nat.c.

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int snat_alloc_outside_address_and_port	(	snat_address_t *	addresses,
		u32	fib_index,
		u32	thread_index,
		snat_session_key_t *	k,
		u32 *	address_indexp,
		u16	port_per_thread,
		u32	snat_thread_index
	)

Definition at line 2057 of file nat.c.

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clib_error_t* snat_api_init	(	vlib_main_t *	vm,
		snat_main_t *	sm
	)

Definition at line 2889 of file nat_api.c.

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int snat_del_address	(	snat_main_t *	sm,
		ip4_address_t	addr,
		u8	delete_sm,
		u8	twice_nat
	)

Definition at line 1414 of file nat.c.

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void snat_free_outside_address_and_port	(	snat_address_t *	addresses,
		u32	thread_index,
		snat_session_key_t *	k,
		u32	address_index
	)

Definition at line 1925 of file nat.c.

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int snat_interface_add_del	(	u32	sw_if_index,
		u8	is_inside,
		int	is_del
	)

Definition at line 1527 of file nat.c.

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int snat_interface_add_del_output_feature	(	u32	sw_if_index,
		u8	is_inside,
		int	is_del
	)

Definition at line 1683 of file nat.c.

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static u8 snat_proto_to_ip_proto ( snat_protocol_t  snat_proto )

inlinestatic

Definition at line 499 of file nat.h.

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int snat_set_workers

(

uword *

bitmap

)

Definition at line 1778 of file nat.c.

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int snat_static_mapping_match	(	snat_main_t *	sm,
		snat_session_key_t	match,
		snat_session_key_t *	mapping,
		u8	by_external,
		u8 *	is_addr_only,
		u8 *	twice_nat
	)

Match NAT44 static mapping.

Parameters

sm	NAT main.
match	Address and port to match.
mapping	External or local address and port of the matched mapping.
by_external	If 0 match by local address otherwise match by external address.
is_addr_only	If matched mapping is address only
twice_nat	If matched mapping is twice NAT.

Returns

0 if match found otherwise 1.

Definition at line 1969 of file nat.c.

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uword unformat_snat_protocol	(	unformat_input_t *	input,
		va_list *	args
	)

Definition at line 2241 of file nat.c.

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static void user_session_increment ( snat_main_t *  sm, snat_user_t *  u, u8  is_static  )

inlinestatic

Definition at line 656 of file nat.h.

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Variable Documentation

format_function_t format_det_map_ses

Definition at line 434 of file nat.h.

format_function_t format_snat_static_map_to_resolve

Definition at line 433 of file nat.h.

format_function_t format_snat_static_mapping

Definition at line 432 of file nat.h.

format_function_t format_snat_user

Definition at line 431 of file nat.h.

vlib_node_registration_t snat_det_in2out_node

(constructor) VLIB_REGISTER_NODE (snat_det_in2out_node)

Definition at line 110 of file in2out.c.

vlib_node_registration_t snat_det_out2in_node

Initial value:

= {
  .function = snat_det_out2in_node_fn,
  .name = "nat44-det-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",
    [SNAT_OUT2IN_NEXT_REASS] = "nat44-out2in-reass",
    [SNAT_OUT2IN_NEXT_IN2OUT] = "nat44-in2out",
  },
}

(constructor) VLIB_REGISTER_NODE (snat_det_out2in_node)

Definition at line 2475 of file out2in.c.

vlib_node_registration_t snat_hairpin_dst_node

(constructor) VLIB_REGISTER_NODE (snat_hairpin_dst_node)

Definition at line 114 of file in2out.c.

vlib_node_registration_t snat_hairpin_src_node

(constructor) VLIB_REGISTER_NODE (snat_hairpin_src_node)

Definition at line 115 of file in2out.c.

vlib_node_registration_t snat_in2out_fast_node

(constructor) VLIB_REGISTER_NODE (snat_in2out_fast_node)

Definition at line 108 of file in2out.c.

vlib_node_registration_t snat_in2out_node

(constructor) VLIB_REGISTER_NODE (snat_in2out_node)

Definition at line 106 of file in2out.c.

vlib_node_registration_t snat_in2out_output_node

(constructor) VLIB_REGISTER_NODE (snat_in2out_output_node)

Definition at line 111 of file in2out.c.

vlib_node_registration_t snat_in2out_output_worker_handoff_node

(constructor) VLIB_REGISTER_NODE (snat_in2out_output_worker_handoff_node)

Definition at line 113 of file in2out.c.

vlib_node_registration_t snat_in2out_worker_handoff_node

(constructor) VLIB_REGISTER_NODE (snat_in2out_worker_handoff_node)

Definition at line 109 of file in2out.c.

snat_main_t snat_main

Definition at line 35 of file nat.c.

vlib_node_registration_t snat_out2in_fast_node

Initial value:

= {
  .function = snat_out2in_fast_node_fn,
  .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",
    [SNAT_OUT2IN_NEXT_REASS] = "nat44-out2in-reass",
    [SNAT_OUT2IN_NEXT_IN2OUT] = "nat44-in2out",
  },
}

(constructor) VLIB_REGISTER_NODE (snat_out2in_fast_node)

Definition at line 2969 of file out2in.c.

vlib_node_registration_t snat_out2in_node

Initial value:

= {
  .function = snat_out2in_node_fn,
  .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",
    [SNAT_OUT2IN_NEXT_REASS] = "nat44-out2in-reass",
    [SNAT_OUT2IN_NEXT_IN2OUT] = "nat44-in2out",
  },
}

(constructor) VLIB_REGISTER_NODE (snat_out2in_node)

Definition at line 1688 of file out2in.c.

vlib_node_registration_t snat_out2in_worker_handoff_node

Initial value:

= {
  .function = snat_out2in_worker_handoff_fn,
  .name = "nat44-out2in-worker-handoff",
  .vector_size = sizeof (u32),
  .format_trace = format_snat_out2in_worker_handoff_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,

  .n_next_nodes = 1,

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

(constructor) VLIB_REGISTER_NODE (snat_out2in_worker_handoff_node)

Definition at line 2786 of file out2in.c.