nat.c File Reference

NAT plugin global declarations. More...

Include dependency graph for nat.c:

Go to the source code of this file.

Functions
	VNET_FEATURE_INIT (nat_pre_in2out, static)
	VNET_FEATURE_INIT (nat_pre_out2in, static)
	VNET_FEATURE_INIT (snat_in2out_worker_handoff, static)
	VNET_FEATURE_INIT (snat_out2in_worker_handoff, static)
	VNET_FEATURE_INIT (ip4_snat_in2out, static)
	VNET_FEATURE_INIT (ip4_snat_out2in, static)
	VNET_FEATURE_INIT (ip4_nat_classify, static)
	VNET_FEATURE_INIT (ip4_nat44_ed_in2out, static)
	VNET_FEATURE_INIT (ip4_nat44_ed_out2in, static)
	VNET_FEATURE_INIT (ip4_nat44_ed_classify, static)
	VNET_FEATURE_INIT (ip4_nat_handoff_classify, static)
	VNET_FEATURE_INIT (ip4_snat_in2out_fast, static)
	VNET_FEATURE_INIT (ip4_snat_out2in_fast, static)
	VNET_FEATURE_INIT (ip4_snat_hairpin_dst, static)
	VNET_FEATURE_INIT (ip4_nat44_ed_hairpin_dst, static)
	VNET_FEATURE_INIT (ip4_snat_in2out_output, static)
	VNET_FEATURE_INIT (ip4_snat_in2out_output_worker_handoff, static)
	VNET_FEATURE_INIT (ip4_snat_hairpin_src, static)
	VNET_FEATURE_INIT (nat_pre_in2out_output, static)
	VNET_FEATURE_INIT (ip4_nat44_ed_in2out_output, static)
	VNET_FEATURE_INIT (ip4_nat44_ed_hairpin_src, static)
	VNET_FEATURE_INIT (ip4_nat_hairpinning, static)
	VNET_FEATURE_INIT (ip4_nat44_ed_hairpinning, static)
	VLIB_PLUGIN_REGISTER ()
void	nat_free_session_data (snat_main_t *sm, snat_session_t *s, u32 thread_index, u8 is_ha)
	Free NAT44 session data (lookup keys, external address port) More...
void	nat44_free_session_data (snat_main_t *sm, snat_session_t *s, u32 thread_index, u8 is_ha)
	Free NAT44 ED session data (lookup keys, external address port) More...
snat_user_t *	nat_user_get_or_create (snat_main_t *sm, ip4_address_t *addr, u32 fib_index, u32 thread_index)
	Find or create NAT user. More...
snat_session_t *	nat_session_alloc_or_recycle (snat_main_t *sm, snat_user_t *u, u32 thread_index, f64 now)
	Allocate new NAT session or recycle last used. 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...
int	snat_add_address (snat_main_t *sm, ip4_address_t *addr, u32 vrf_id, u8 twice_nat)
	Add external address to NAT44 pool. More...
static int	is_snat_address_used_in_static_mapping (snat_main_t *sm, ip4_address_t addr)
static void	snat_add_static_mapping_when_resolved (snat_main_t *sm, ip4_address_t l_addr, u16 l_port, u32 sw_if_index, u16 e_port, u32 vrf_id, nat_protocol_t proto, int addr_only, int is_add, u8 *tag, int twice_nat, int out2in_only, int identity_nat, ip4_address_t pool_addr, int exact)
static u32	get_thread_idx_by_port (u16 e_port)
void	snat_static_mapping_del_sessions (snat_main_t *sm, snat_main_per_thread_data_t *tsm, snat_user_key_t u_key, int addr_only, ip4_address_t e_addr, u16 e_port)
void	snat_ed_static_mapping_del_sessions (snat_main_t *sm, snat_main_per_thread_data_t *tsm, ip4_address_t l_addr, u16 l_port, u8 protocol, u32 fib_index, int addr_only, ip4_address_t e_addr, u16 e_port)
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, nat_protocol_t proto, int is_add, twice_nat_type_t twice_nat, u8 out2in_only, u8 *tag, u8 identity_nat, ip4_address_t pool_addr, int exact)
	Add/delete NAT44 static mapping. More...
int	nat44_add_del_lb_static_mapping (ip4_address_t e_addr, u16 e_port, nat_protocol_t proto, nat44_lb_addr_port_t *locals, u8 is_add, twice_nat_type_t twice_nat, u8 out2in_only, u8 *tag, u32 affinity)
	Add/delete static mapping with load-balancing (multiple backends) More...
int	nat44_lb_static_mapping_add_del_local (ip4_address_t e_addr, u16 e_port, ip4_address_t l_addr, u16 l_port, nat_protocol_t proto, u32 vrf_id, u8 probability, u8 is_add)
int	snat_del_address (snat_main_t *sm, ip4_address_t addr, u8 delete_sm, u8 twice_nat)
	Delete external address from NAT44 pool. More...
static void	nat_validate_counters (snat_main_t *sm, u32 sw_if_index)
void	expire_per_vrf_sessions (u32 fib_index)
void	update_per_vrf_sessions_vec (u32 fib_index, int is_del)
int	snat_interface_add_del (u32 sw_if_index, u8 is_inside, int is_del)
	Enable/disable NAT44 feature on the interface. More...
int	snat_interface_add_del_output_feature (u32 sw_if_index, u8 is_inside, int is_del)
	Enable/disable NAT44 output feature on the interface (postrouting NAT) More...
int	snat_set_workers (uword *bitmap)
	Set NAT plugin workers. More...
static void	snat_update_outside_fib (u32 sw_if_index, u32 new_fib_index, u32 old_fib_index)
static void	snat_ip4_table_bind (ip4_main_t *im, uword opaque, u32 sw_if_index, u32 new_fib_index, u32 old_fib_index)
static void	snat_ip4_add_del_interface_address_cb (ip4_main_t *im, uword opaque, u32 sw_if_index, ip4_address_t *address, u32 address_length, u32 if_address_index, u32 is_delete)
static void	nat_ip4_add_del_addr_only_sm_cb (ip4_main_t *im, uword opaque, u32 sw_if_index, ip4_address_t *address, u32 address_length, u32 if_address_index, u32 is_delete)
static int	nat_alloc_addr_and_port_default (snat_address_t *addresses, u32 fib_index, u32 thread_index, nat_protocol_t proto, ip4_address_t *addr, u16 *port, u16 port_per_thread, u32 snat_thread_index)
void	test_key_calc_split ()
static clib_error_t *	nat_ip_table_add_del (vnet_main_t *vnm, u32 table_id, u32 is_add)
	VNET_IP_TABLE_ADD_DEL_FUNCTION (nat_ip_table_add_del)
static clib_error_t *	snat_init (vlib_main_t *vm)
void	snat_free_outside_address_and_port (snat_address_t *addresses, u32 thread_index, ip4_address_t *addr, u16 port, nat_protocol_t protocol)
	Free outside address and port pair. More...
static int	nat_set_outside_address_and_port (snat_address_t *addresses, u32 thread_index, ip4_address_t addr, u16 port, nat_protocol_t protocol)
int	snat_static_mapping_match (snat_main_t *sm, ip4_address_t match_addr, u16 match_port, u32 match_fib_index, nat_protocol_t match_protocol, ip4_address_t *mapping_addr, u16 *mapping_port, u32 *mapping_fib_index, u8 by_external, u8 *is_addr_only, twice_nat_type_t *twice_nat, lb_nat_type_t *lb, ip4_address_t *ext_host_addr, u8 *is_identity_nat, snat_static_mapping_t **out)
	Match NAT44 static mapping. More...
int	snat_alloc_outside_address_and_port (snat_address_t *addresses, u32 fib_index, u32 thread_index, nat_protocol_t proto, ip4_address_t *addr, u16 *port, u16 port_per_thread, u32 snat_thread_index)
	Alloc outside address and port. More...
static int	nat_alloc_addr_and_port_mape (snat_address_t *addresses, u32 fib_index, u32 thread_index, nat_protocol_t proto, ip4_address_t *addr, u16 *port, u16 port_per_thread, u32 snat_thread_index)
static int	nat_alloc_addr_and_port_range (snat_address_t *addresses, u32 fib_index, u32 thread_index, nat_protocol_t proto, ip4_address_t *addr, u16 *port, u16 port_per_thread, u32 snat_thread_index)
void	nat44_add_del_address_dpo (ip4_address_t addr, u8 is_add)
	Add/delete external address to FIB DPO (out2in DPO mode) More...
u8 *	format_session_kvp (u8 *s, va_list *args)
u8 *	format_static_mapping_kvp (u8 *s, va_list *args)
u8 *	format_user_kvp (u8 *s, va_list *args)
u8 *	format_ed_session_kvp (u8 *s, va_list *args)
static u32	snat_get_worker_in2out_cb (ip4_header_t *ip0, u32 rx_fib_index0, u8 is_output)
static u32	snat_get_worker_out2in_cb (vlib_buffer_t *b, ip4_header_t *ip0, u32 rx_fib_index0, u8 is_output)
static u32	nat44_ed_get_worker_in2out_cb (ip4_header_t *ip, u32 rx_fib_index, u8 is_output)
static u32	nat44_ed_get_worker_out2in_cb (vlib_buffer_t *b, ip4_header_t *ip, u32 rx_fib_index, u8 is_output)
void	nat_ha_sadd_cb (ip4_address_t *in_addr, u16 in_port, ip4_address_t *out_addr, u16 out_port, ip4_address_t *eh_addr, u16 eh_port, ip4_address_t *ehn_addr, u16 ehn_port, u8 proto, u32 fib_index, u16 flags, u32 thread_index)
void	nat_ha_sdel_cb (ip4_address_t *out_addr, u16 out_port, ip4_address_t *eh_addr, u16 eh_port, u8 proto, u32 fib_index, u32 ti)
void	nat_ha_sref_cb (ip4_address_t *out_addr, u16 out_port, ip4_address_t *eh_addr, u16 eh_port, u8 proto, u32 fib_index, u32 total_pkts, u64 total_bytes, u32 thread_index)
void	nat_ha_sadd_ed_cb (ip4_address_t *in_addr, u16 in_port, ip4_address_t *out_addr, u16 out_port, ip4_address_t *eh_addr, u16 eh_port, ip4_address_t *ehn_addr, u16 ehn_port, u8 proto, u32 fib_index, u16 flags, u32 thread_index)
void	nat_ha_sdel_ed_cb (ip4_address_t *out_addr, u16 out_port, ip4_address_t *eh_addr, u16 eh_port, u8 proto, u32 fib_index, u32 ti)
void	nat_ha_sref_ed_cb (ip4_address_t *out_addr, u16 out_port, ip4_address_t *eh_addr, u16 eh_port, u8 proto, u32 fib_index, u32 total_pkts, u64 total_bytes, u32 thread_index)
static u32	nat_calc_bihash_buckets (u32 n_elts)
static u32	nat_calc_bihash_memory (u32 n_buckets, uword kv_size)
u32	nat44_get_max_session_limit ()
int	nat44_set_session_limit (u32 session_limit, u32 vrf_id)
	Set NAT44 session limit (session limit, vrf id) More...
int	nat44_update_session_limit (u32 session_limit, u32 vrf_id)
	Update NAT44 session limit flushing all data (session limit, vrf id) More...
void	nat44_db_init (snat_main_per_thread_data_t *tsm)
	Initialize NAT44 data. More...
void	nat44_db_free (snat_main_per_thread_data_t *tsm)
	Free NAT44 data. More...
void	nat44_sessions_clear ()
static clib_error_t *	snat_config (vlib_main_t *vm, unformat_input_t *input)
int	snat_add_interface_address (snat_main_t *sm, u32 sw_if_index, int is_del, u8 twice_nat)
	Add/delete NAT44 pool address from specific interface. More...
int	nat44_del_session (snat_main_t *sm, ip4_address_t *addr, u16 port, nat_protocol_t proto, u32 vrf_id, int is_in)
	Delete NAT44 session. More...
int	nat44_del_ed_session (snat_main_t *sm, ip4_address_t *addr, u16 port, ip4_address_t *eh_addr, u16 eh_port, u8 proto, u32 vrf_id, int is_in)
	Delete NAT44 endpoint-dependent session. More...
void	nat_set_alloc_addr_and_port_mape (u16 psid, u16 psid_offset, u16 psid_length)
	Set address and port assignment algorithm for MAP-E CE. More...
void	nat_set_alloc_addr_and_port_range (u16 start_port, u16 end_port)
	Set address and port assignment algorithm for port range. More...
void	nat_set_alloc_addr_and_port_default (void)
	Set address and port assignment algorithm to default/standard. More...
VLIB_NODE_FN()	nat_default_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)

Variables
snat_main_t	snat_main
fib_source_t	nat_fib_src_hi
fib_source_t	nat_fib_src_low
vlib_node_registration_t	nat_default_node
	(constructor) VLIB_REGISTER_NODE (nat_default_node) More...

Detailed Description

NAT plugin global declarations.

Definition in file nat.c.

Function Documentation

expire_per_vrf_sessions()

void expire_per_vrf_sessions

(

u32

fib_index

)

Definition at line 1827 of file nat.c.

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format_ed_session_kvp()

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

Definition at line 3235 of file nat.c.

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format_session_kvp()

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

Definition at line 3200 of file nat.c.

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format_static_mapping_kvp()

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

Definition at line 3210 of file nat.c.

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format_user_kvp()

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

Definition at line 3221 of file nat.c.

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get_thread_idx_by_port()

static u32 get_thread_idx_by_port ( u16  e_port )

static

Definition at line 724 of file nat.c.

is_snat_address_used_in_static_mapping()

static int is_snat_address_used_in_static_mapping ( snat_main_t *  sm, ip4_address_t  addr  )

static

Definition at line 673 of file nat.c.

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nat44_add_del_address_dpo()

void nat44_add_del_address_dpo	(	ip4_address_t	addr,
		u8	is_add
	)

Add/delete external address to FIB DPO (out2in DPO mode)

Parameters

addr	IPv4 address
is_add	1 = add, 0 = delete

Returns

0 on success, non-zero value otherwise

Definition at line 3177 of file nat.c.

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nat44_add_del_lb_static_mapping()

int nat44_add_del_lb_static_mapping	(	ip4_address_t	e_addr,
		u16	e_port,
		nat_protocol_t	proto,
		nat44_lb_addr_port_t *	locals,
		u8	is_add,
		twice_nat_type_t	twice_nat,
		u8	out2in_only,
		u8 *	tag,
		u32	affinity
	)

Add/delete static mapping with load-balancing (multiple backends)

Parameters

e_addr	external IPv4 address
e_port	external port number
proto	L4 protocol
locals	list of local backends
is_add	1 = add, 0 = delete
twice_nat	twice-nat mode
out2in_only	if 1 rule match only out2in direction
tag	opaque string tag
affinity	0 = disabled, otherwise client IP affinity sticky time

Returns

0 on success, non-zero value otherwise

Definition at line 1281 of file nat.c.

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nat44_db_free()

void nat44_db_free

(

snat_main_per_thread_data_t *

tsm

)

Free NAT44 data.

Parameters

tsm	per thread data

Definition at line 4033 of file nat.c.

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nat44_db_init()

void nat44_db_init

(

snat_main_per_thread_data_t *

tsm

)

Initialize NAT44 data.

Parameters

tsm	per thread data

Definition at line 3975 of file nat.c.

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nat44_del_ed_session()

int nat44_del_ed_session	(	snat_main_t *	sm,
		ip4_address_t *	addr,
		u16	port,
		ip4_address_t *	eh_addr,
		u16	eh_port,
		u8	proto,
		u32	vrf_id,
		int	is_in
	)

Delete NAT44 endpoint-dependent session.

Parameters

sm	snat global configuration data
addr	IPv4 address
port	L4 port number
proto	L4 protocol
vrf_id	VRF ID
is_in	1 = inside network address and port pair, 0 = outside

Returns

0 on success, non-zero value otherwise

Definition at line 4582 of file nat.c.

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nat44_del_session()

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

Delete NAT44 session.

Parameters

addr	IPv4 address
port	L4 port number
proto	L4 protocol
vrf_id	VRF ID
is_in	1 = inside network address and port pair, 0 = outside

Returns

0 on success, non-zero value otherwise

Definition at line 4544 of file nat.c.

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nat44_ed_get_worker_in2out_cb()

static u32 nat44_ed_get_worker_in2out_cb ( ip4_header_t *  ip, u32  rx_fib_index, u8  is_output  )

static

Definition at line 3361 of file nat.c.

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nat44_ed_get_worker_out2in_cb()

static u32 nat44_ed_get_worker_out2in_cb ( vlib_buffer_t *  b, ip4_header_t *  ip, u32  rx_fib_index, u8  is_output  )

static

Definition at line 3463 of file nat.c.

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nat44_free_session_data()

void nat44_free_session_data	(	snat_main_t *	sm,
		snat_session_t *	s,
		u32	thread_index,
		u8	is_ha
	)

Free NAT44 ED session data (lookup keys, external address port)

Parameters

s	NAT session
thread_index	thread index
is_ha	is HA event

Definition at line 323 of file nat.c.

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nat44_get_max_session_limit()

u32 nat44_get_max_session_limit

(

)

Definition at line 3919 of file nat.c.

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nat44_lb_static_mapping_add_del_local()

int nat44_lb_static_mapping_add_del_local	(	ip4_address_t	e_addr,
		u16	e_port,
		ip4_address_t	l_addr,
		u16	l_port,
		nat_protocol_t	proto,
		u32	vrf_id,
		u8	probability,
		u8	is_add
	)

Definition at line 1515 of file nat.c.

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nat44_sessions_clear()

void nat44_sessions_clear

(

)

Definition at line 4058 of file nat.c.

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nat44_set_session_limit()

int nat44_set_session_limit	(	u32	session_limit,
		u32	vrf_id
	)

Set NAT44 session limit (session limit, vrf id)

Parameters

session_limit	Session limit
vrf_id	VRF id

Returns

0 on success, non-zero value otherwise

Definition at line 3933 of file nat.c.

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nat44_update_session_limit()

int nat44_update_session_limit	(	u32	session_limit,
		u32	vrf_id
	)

Update NAT44 session limit flushing all data (session limit, vrf id)

Parameters

session_limit	Session limit
vrf_id	VRF id

Returns

0 on success, non-zero value otherwise

Definition at line 3952 of file nat.c.

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nat_alloc_addr_and_port_default()

static int nat_alloc_addr_and_port_default ( snat_address_t *  addresses, u32  fib_index, u32  thread_index, nat_protocol_t  proto, ip4_address_t *  addr, u16 *  port, u16  port_per_thread, u32  snat_thread_index  )

static

Definition at line 2992 of file nat.c.

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nat_alloc_addr_and_port_mape()

static int nat_alloc_addr_and_port_mape ( snat_address_t *  addresses, u32  fib_index, u32  thread_index, nat_protocol_t  proto, ip4_address_t *  addr, u16 *  port, u16  port_per_thread, u32  snat_thread_index  )

static

Definition at line 3081 of file nat.c.

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nat_alloc_addr_and_port_range()

static int nat_alloc_addr_and_port_range ( snat_address_t *  addresses, u32  fib_index, u32  thread_index, nat_protocol_t  proto, ip4_address_t *  addr, u16 *  port, u16  port_per_thread, u32  snat_thread_index  )

static

Definition at line 3130 of file nat.c.

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nat_calc_bihash_buckets()

static u32 nat_calc_bihash_buckets ( u32  n_elts )

static

Definition at line 3907 of file nat.c.

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nat_calc_bihash_memory()

static u32 nat_calc_bihash_memory ( u32  n_buckets, uword  kv_size  )

static

Definition at line 3913 of file nat.c.

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nat_default_node()

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

Definition at line 4651 of file nat.c.

nat_free_session_data()

void nat_free_session_data	(	snat_main_t *	sm,
		snat_session_t *	s,
		u32	thread_index,
		u8	is_ha
	)

Free NAT44 session data (lookup keys, external address port)

Parameters

sm	snat global configuration data
s	NAT session
thread_index	thread index
is_ha	is HA event

Definition at line 186 of file nat.c.

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nat_ha_sadd_cb()

void nat_ha_sadd_cb	(	ip4_address_t *	in_addr,
		u16	in_port,
		ip4_address_t *	out_addr,
		u16	out_port,
		ip4_address_t *	eh_addr,
		u16	eh_port,
		ip4_address_t *	ehn_addr,
		u16	ehn_port,
		u8	proto,
		u32	fib_index,
		u16	flags,
		u32	thread_index
	)

Definition at line 3620 of file nat.c.

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nat_ha_sadd_ed_cb()

void nat_ha_sadd_ed_cb	(	ip4_address_t *	in_addr,
		u16	in_port,
		ip4_address_t *	out_addr,
		u16	out_port,
		ip4_address_t *	eh_addr,
		u16	eh_port,
		ip4_address_t *	ehn_addr,
		u16	ehn_port,
		u8	proto,
		u32	fib_index,
		u16	flags,
		u32	thread_index
	)

Definition at line 3759 of file nat.c.

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nat_ha_sdel_cb()

void nat_ha_sdel_cb	(	ip4_address_t *	out_addr,
		u16	out_port,
		ip4_address_t *	eh_addr,
		u16	eh_port,
		u8	proto,
		u32	fib_index,
		u32	ti
	)

Definition at line 3709 of file nat.c.

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nat_ha_sdel_ed_cb()

void nat_ha_sdel_ed_cb	(	ip4_address_t *	out_addr,
		u16	out_port,
		ip4_address_t *	eh_addr,
		u16	eh_port,
		u8	proto,
		u32	fib_index,
		u32	ti
	)

Definition at line 3856 of file nat.c.

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nat_ha_sref_cb()

void nat_ha_sref_cb	(	ip4_address_t *	out_addr,
		u16	out_port,
		ip4_address_t *	eh_addr,
		u16	eh_port,
		u8	proto,
		u32	fib_index,
		u32	total_pkts,
		u64	total_bytes,
		u32	thread_index
	)

Definition at line 3738 of file nat.c.

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nat_ha_sref_ed_cb()

void nat_ha_sref_ed_cb	(	ip4_address_t *	out_addr,
		u16	out_port,
		ip4_address_t *	eh_addr,
		u16	eh_port,
		u8	proto,
		u32	fib_index,
		u32	total_pkts,
		u64	total_bytes,
		u32	thread_index
	)

Definition at line 3885 of file nat.c.

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nat_ip4_add_del_addr_only_sm_cb()

static void nat_ip4_add_del_addr_only_sm_cb ( ip4_main_t *  im, uword  opaque, u32  sw_if_index, ip4_address_t *  address, u32  address_length, u32  if_address_index, u32  is_delete  )

static

Definition at line 4328 of file nat.c.

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nat_ip_table_add_del()

static clib_error_t* nat_ip_table_add_del ( vnet_main_t *  vnm, u32  table_id, u32  is_add  )

static

Definition at line 2517 of file nat.c.

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nat_session_alloc_or_recycle()

snat_session_t* nat_session_alloc_or_recycle	(	snat_main_t *	sm,
		snat_user_t *	u,
		u32	thread_index,
		f64	now
	)

Allocate new NAT session or recycle last used.

Parameters

sm	snat global configuration data
u	NAT user
thread_index	thread index
now	time now

Returns

session data structure on success otherwise zero value

Definition at line 505 of file nat.c.

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nat_set_alloc_addr_and_port_default()

void nat_set_alloc_addr_and_port_default

(

void

)

Set address and port assignment algorithm to default/standard.

Definition at line 4643 of file nat.c.

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nat_set_alloc_addr_and_port_mape()

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

Set address and port assignment algorithm for MAP-E CE.

Parameters

psid	Port Set Identifier value
psid_offset	number of offset bits
psid_length	length of PSID

Definition at line 4620 of file nat.c.

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nat_set_alloc_addr_and_port_range()

void nat_set_alloc_addr_and_port_range	(	u16	start_port,
		u16	end_port
	)

Set address and port assignment algorithm for port range.

Parameters

start_port	beginning of the port range
end_port	end of the port range

Definition at line 4632 of file nat.c.

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nat_set_outside_address_and_port()

static int nat_set_outside_address_and_port ( snat_address_t *  addresses, u32  thread_index, ip4_address_t  addr, u16  port, nat_protocol_t  protocol  )

static

Definition at line 2778 of file nat.c.

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nat_user_get_or_create()

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

Find or create NAT user.

Parameters

sm	snat global configuration data
addr	IPv4 address
fib_index	FIB table index
thread_index	thread index

Returns

NAT user data structure on success otherwise zero value

Definition at line 446 of file nat.c.

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nat_validate_counters()

static void nat_validate_counters ( snat_main_t *  sm, u32  sw_if_index  )

static

Definition at line 1793 of file nat.c.

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snat_add_address()

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

Add external address to NAT44 pool.

Parameters

sm	snat global configuration data
addr	IPv4 address
vrf_id	VRF id of tenant, ~0 means independent of VRF
twice_nat	1 if twice NAT address

Returns

0 on success, non-zero value otherwise

Definition at line 608 of file nat.c.

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snat_add_del_addr_to_fib()

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	software index of the outside interface
is_add	0 = delete, 1 = add.

Definition at line 580 of file nat.c.

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snat_add_interface_address()

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

Add/delete NAT44 pool address from specific interface.

Parameters

sw_if_index	software index of the interface
is_del	1 = delete, 0 = add
twice_nat	1 = twice NAT address for external hosts

Returns

0 on success, non-zero value otherwise

Definition at line 4476 of file nat.c.

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snat_add_static_mapping()

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,
		nat_protocol_t	proto,
		int	is_add,
		twice_nat_type_t	twice_nat,
		u8	out2in_only,
		u8 *	tag,
		u8	identity_nat,
		ip4_address_t	pool_addr,
		int	exact
	)

Add/delete NAT44 static mapping.

Parameters

l_addr	local IPv4 address
e_addr	external IPv4 address
l_port	local port number
e_port	external port number
vrf_id	local VRF ID
addr_only	1 = 1:1NAT, 0 = 1:1NAPT
sw_if_index	use interface address as external IPv4 address
proto	L4 protocol
is_add	1 = add, 0 = delete
twice_nat	twice-nat mode
out2in_only	if 1 rule match only out2in direction
tag	opaque string tag
identity_nat	identity NAT
pool_addr	pool IPv4 address
exact	1 = exact pool address

Returns

0 on success, non-zero value otherwise

Definition at line 837 of file nat.c.

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snat_add_static_mapping_when_resolved()

static void snat_add_static_mapping_when_resolved ( snat_main_t *  sm, ip4_address_t  l_addr, u16  l_port, u32  sw_if_index, u16  e_port, u32  vrf_id, nat_protocol_t  proto, int  addr_only, int  is_add, u8 *  tag, int  twice_nat, int  out2in_only, int  identity_nat, ip4_address_t  pool_addr, int  exact  )

static

Definition at line 692 of file nat.c.

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snat_alloc_outside_address_and_port()

int snat_alloc_outside_address_and_port	(	snat_address_t *	addresses,
		u32	fib_index,
		u32	thread_index,
		nat_protocol_t	proto,
		ip4_address_t *	addr,
		u16 *	port,
		u16	port_per_thread,
		u32	snat_thread_index
	)

Alloc outside address and port.

Parameters

addresses	vector of outside addresses
fib_index	FIB table index
thread_index	thread index
port_per_thread	number of ports per thread
snat_thread_index	NAT thread index

Returns

0 on success, non-zero value otherwise

Definition at line 2975 of file nat.c.

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snat_config()

static clib_error_t* snat_config ( vlib_main_t *  vm, unformat_input_t *  input  )

static

Definition at line 4091 of file nat.c.

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snat_del_address()

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

Delete external address from NAT44 pool.

Parameters

sm	snat global configuration data
addr	IPv4 address
delete_sm	1 if delete static mapping using address
twice_nat	1 if twice NAT address

Returns

0 on success, non-zero value otherwise

Definition at line 1666 of file nat.c.

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snat_ed_static_mapping_del_sessions()

void snat_ed_static_mapping_del_sessions	(	snat_main_t *	sm,
		snat_main_per_thread_data_t *	tsm,
		ip4_address_t	l_addr,
		u16	l_port,
		u8	protocol,
		u32	fib_index,
		int	addr_only,
		ip4_address_t	e_addr,
		u16	e_port
	)

Definition at line 791 of file nat.c.

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snat_free_outside_address_and_port()

void snat_free_outside_address_and_port	(	snat_address_t *	addresses,
		u32	thread_index,
		ip4_address_t *	addr,
		u16	port,
		nat_protocol_t	protocol
	)

Free outside address and port pair.

Parameters

addresses	vector of outside addresses
thread_index	thread index
key	address, port and protocol

Definition at line 2740 of file nat.c.

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snat_get_worker_in2out_cb()

static u32 snat_get_worker_in2out_cb ( ip4_header_t *  ip0, u32  rx_fib_index0, u8  is_output  )

static

Definition at line 3257 of file nat.c.

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snat_get_worker_out2in_cb()

static u32 snat_get_worker_out2in_cb ( vlib_buffer_t *  b, ip4_header_t *  ip0, u32  rx_fib_index0, u8  is_output  )

static

Definition at line 3277 of file nat.c.

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snat_init()

static clib_error_t* snat_init ( vlib_main_t *  vm )

static

Definition at line 2540 of file nat.c.

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snat_interface_add_del()

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

Enable/disable NAT44 feature on the interface.

Parameters

sw_if_index	software index of the interface
is_inside	1 = inside, 0 = outside
is_del	1 = delete, 0 = add

Returns

0 on success, non-zero value otherwise

Definition at line 1886 of file nat.c.

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snat_interface_add_del_output_feature()

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

Enable/disable NAT44 output feature on the interface (postrouting NAT)

Parameters

sw_if_index	software index of the interface
is_inside	1 = inside, 0 = outside
is_del	1 = delete, 0 = add

Returns

0 on success, non-zero value otherwise

Definition at line 2137 of file nat.c.

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snat_ip4_add_del_interface_address_cb()

static void snat_ip4_add_del_interface_address_cb ( ip4_main_t *  im, uword  opaque, u32  sw_if_index, ip4_address_t *  address, u32  address_length, u32  if_address_index, u32  is_delete  )

static

Definition at line 4393 of file nat.c.

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snat_ip4_table_bind()

static void snat_ip4_table_bind ( ip4_main_t *  im, uword  opaque, u32  sw_if_index, u32  new_fib_index, u32  old_fib_index  )

static

Definition at line 2435 of file nat.c.

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snat_set_workers()

int snat_set_workers

(

uword *

bitmap

)

Set NAT plugin workers.

Parameters

bitmap

NAT workers bitmap

Returns

0 on success, non-zero value otherwise

Definition at line 2337 of file nat.c.

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snat_static_mapping_del_sessions()

void snat_static_mapping_del_sessions	(	snat_main_t *	sm,
		snat_main_per_thread_data_t *	tsm,
		snat_user_key_t	u_key,
		int	addr_only,
		ip4_address_t	e_addr,
		u16	e_port
	)

Definition at line 738 of file nat.c.

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snat_static_mapping_match()

int snat_static_mapping_match	(	snat_main_t *	sm,
		ip4_address_t	match_addr,
		u16	match_port,
		u32	match_fib_index,
		nat_protocol_t	match_protocol,
		ip4_address_t *	mapping_addr,
		u16 *	mapping_port,
		u32 *	mapping_fib_index,
		u8	by_external,
		u8 *	is_addr_only,
		twice_nat_type_t *	twice_nat,
		lb_nat_type_t *	lb,
		ip4_address_t *	ext_host_addr,
		u8 *	is_identity_nat,
		snat_static_mapping_t **	out
	)

Match NAT44 static mapping.

Parameters

key	address and port to match
addr	external/local address of the matched mapping
port	port of the matched mapping
fib_index	fib index of the matched mapping
by_external	if 0 match by local address otherwise match by external address
is_addr_only	1 if matched mapping is address only
twice_nat	matched mapping is twice NAT type
lb	1 if matched mapping is load-balanced
ext_host_addr	external host address
is_identity_nat	1 if indentity mapping
out	if !=0 set to pointer of the mapping structure

Returns

0 if match found otherwise 1.

Definition at line 2815 of file nat.c.

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snat_update_outside_fib()

static void snat_update_outside_fib ( u32  sw_if_index, u32  new_fib_index, u32  old_fib_index  )

static

Definition at line 2365 of file nat.c.

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test_key_calc_split()

void test_key_calc_split

(

)

Definition at line 2465 of file nat.c.

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update_per_vrf_sessions_vec()

void update_per_vrf_sessions_vec	(	u32	fib_index,
		int	is_del
	)

Definition at line 1849 of file nat.c.

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VLIB_PLUGIN_REGISTER()

VLIB_PLUGIN_REGISTER

(

)

VNET_FEATURE_INIT() [1/23]

VNET_FEATURE_INIT	(	nat_pre_in2out	,
		static
	)

VNET_FEATURE_INIT() [2/23]

VNET_FEATURE_INIT	(	nat_pre_out2in	,
		static
	)

VNET_FEATURE_INIT() [3/23]

VNET_FEATURE_INIT	(	snat_in2out_worker_handoff	,
		static
	)

VNET_FEATURE_INIT() [4/23]

VNET_FEATURE_INIT	(	snat_out2in_worker_handoff	,
		static
	)

VNET_FEATURE_INIT() [5/23]

VNET_FEATURE_INIT	(	ip4_snat_in2out	,
		static
	)

VNET_FEATURE_INIT() [6/23]

VNET_FEATURE_INIT	(	ip4_snat_out2in	,
		static
	)

VNET_FEATURE_INIT() [7/23]

VNET_FEATURE_INIT	(	ip4_nat_classify	,
		static
	)

VNET_FEATURE_INIT() [8/23]

VNET_FEATURE_INIT	(	ip4_nat44_ed_in2out	,
		static
	)

VNET_FEATURE_INIT() [9/23]

VNET_FEATURE_INIT	(	ip4_nat44_ed_out2in	,
		static
	)

VNET_FEATURE_INIT() [10/23]

VNET_FEATURE_INIT	(	ip4_nat44_ed_classify	,
		static
	)

VNET_FEATURE_INIT() [11/23]

VNET_FEATURE_INIT	(	ip4_nat_handoff_classify	,
		static
	)

VNET_FEATURE_INIT() [12/23]

VNET_FEATURE_INIT	(	ip4_snat_in2out_fast	,
		static
	)

VNET_FEATURE_INIT() [13/23]

VNET_FEATURE_INIT	(	ip4_snat_out2in_fast	,
		static
	)

VNET_FEATURE_INIT() [14/23]

VNET_FEATURE_INIT	(	ip4_snat_hairpin_dst	,
		static
	)

VNET_FEATURE_INIT() [15/23]

VNET_FEATURE_INIT	(	ip4_nat44_ed_hairpin_dst	,
		static
	)

VNET_FEATURE_INIT() [16/23]

VNET_FEATURE_INIT	(	ip4_snat_in2out_output	,
		static
	)

VNET_FEATURE_INIT() [17/23]

VNET_FEATURE_INIT	(	ip4_snat_in2out_output_worker_handoff	,
		static
	)

VNET_FEATURE_INIT() [18/23]

VNET_FEATURE_INIT	(	ip4_snat_hairpin_src	,
		static
	)

VNET_FEATURE_INIT() [19/23]

VNET_FEATURE_INIT	(	nat_pre_in2out_output	,
		static
	)

VNET_FEATURE_INIT() [20/23]

VNET_FEATURE_INIT	(	ip4_nat44_ed_in2out_output	,
		static
	)

VNET_FEATURE_INIT() [21/23]

VNET_FEATURE_INIT	(	ip4_nat44_ed_hairpin_src	,
		static
	)

VNET_FEATURE_INIT() [22/23]

VNET_FEATURE_INIT	(	ip4_nat_hairpinning	,
		static
	)

VNET_FEATURE_INIT() [23/23]

VNET_FEATURE_INIT	(	ip4_nat44_ed_hairpinning	,
		static
	)

VNET_IP_TABLE_ADD_DEL_FUNCTION()

VNET_IP_TABLE_ADD_DEL_FUNCTION

(

nat_ip_table_add_del

)

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Variable Documentation

nat_default_node

vlib_node_registration_t nat_default_node

Initial value:

= {
  .name = "nat-default",
  .vector_size = sizeof (u32),
  .format_trace = 0,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = 0,
  .n_next_nodes = NAT_N_NEXT,
  .next_nodes = {
    [NAT_NEXT_DROP] = "error-drop",
    [NAT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
    [NAT_NEXT_IN2OUT_ED_FAST_PATH] = "nat44-ed-in2out",
    [NAT_NEXT_IN2OUT_ED_SLOW_PATH] = "nat44-ed-in2out-slowpath",
    [NAT_NEXT_IN2OUT_ED_OUTPUT_FAST_PATH] = "nat44-ed-in2out-output",
    [NAT_NEXT_IN2OUT_ED_OUTPUT_SLOW_PATH] = "nat44-ed-in2out-output-slowpath",
    [NAT_NEXT_OUT2IN_ED_FAST_PATH] = "nat44-ed-out2in",
    [NAT_NEXT_OUT2IN_ED_SLOW_PATH] = "nat44-ed-out2in-slowpath",
    [NAT_NEXT_IN2OUT_CLASSIFY] = "nat44-in2out-worker-handoff",
    [NAT_NEXT_OUT2IN_CLASSIFY] = "nat44-out2in-worker-handoff",
  },
}

(constructor) VLIB_REGISTER_NODE (nat_default_node)

Definition at line 4659 of file nat.c.

nat_fib_src_hi

fib_source_t nat_fib_src_hi

Definition at line 41 of file nat.c.

nat_fib_src_low

fib_source_t nat_fib_src_low

Definition at line 42 of file nat.c.

snat_main

snat_main_t snat_main

Definition at line 39 of file nat.c.