nat.c File Reference

Include dependency graph for nat.c:

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Enumerations
enum	nat44_classify_next_t { NAT44_CLASSIFY_NEXT_IN2OUT, NAT44_CLASSIFY_NEXT_OUT2IN, NAT44_CLASSIFY_N_NEXT }

Functions
	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_snat_det_in2out, static)
	VNET_FEATURE_INIT (ip4_snat_det_out2in, static)
	VNET_FEATURE_INIT (ip4_nat_det_classify, static)
	VNET_FEATURE_INIT (ip4_snat_in2out_worker_handoff, static)
	VNET_FEATURE_INIT (ip4_snat_out2in_worker_handoff, 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_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 (ip4_nat_hairpinning, static)
	VLIB_PLUGIN_REGISTER ()
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)
static uword	nat44_classify_node_fn_inline (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
static uword	nat44_classify_node_fn (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
	VLIB_NODE_FUNCTION_MULTIARCH (nat44_classify_node, nat44_classify_node_fn)
static uword	nat44_det_classify_node_fn (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
	VLIB_NODE_FUNCTION_MULTIARCH (nat44_det_classify_node, nat44_det_classify_node_fn)
static uword	nat44_handoff_classify_node_fn (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
	VLIB_NODE_FUNCTION_MULTIARCH (nat44_handoff_classify_node, nat44_handoff_classify_node_fn)
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...
void	snat_add_address (snat_main_t *sm, ip4_address_t *addr, u32 vrf_id, u8 twice_nat)
static int	is_snat_address_used_in_static_mapping (snat_main_t *sm, ip4_address_t addr)
void	increment_v4_address (ip4_address_t *a)
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, snat_protocol_t proto, int addr_only, int is_add, u8 *tag)
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...
static int	lb_local_exists (nat44_lb_addr_port_t *local, ip4_address_t *e_addr, u16 e_port)
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	snat_del_address (snat_main_t *sm, ip4_address_t addr, u8 delete_sm, u8 twice_nat)
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_set_workers (uword *bitmap)
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, snat_session_key_t *k, u32 *address_indexp, u16 port_per_thread, u32 snat_thread_index)
static clib_error_t *	snat_init (vlib_main_t *vm)
void	snat_free_outside_address_and_port (snat_address_t *addresses, u32 thread_index, snat_session_key_t *k, u32 address_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...
static_always_inline u16	snat_random_port (u16 min, u16 max)
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)
static int	nat_alloc_addr_and_port_mape (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)
void	nat44_add_del_address_dpo (ip4_address_t addr, u8 is_add)
uword	unformat_snat_protocol (unformat_input_t *input, va_list *args)
u8 *	format_snat_protocol (u8 *s, va_list *args)
static u32	snat_get_worker_in2out_cb (ip4_header_t *ip0, u32 rx_fib_index0)
static u32	snat_get_worker_out2in_cb (ip4_header_t *ip0, u32 rx_fib_index0)
static clib_error_t *	snat_config (vlib_main_t *vm, unformat_input_t *input)
u8 *	format_snat_session_state (u8 *s, va_list *args)
u8 *	format_snat_key (u8 *s, va_list *args)
u8 *	format_snat_session (u8 *s, va_list *args)
u8 *	format_snat_user (u8 *s, va_list *args)
u8 *	format_snat_static_mapping (u8 *s, va_list *args)
u8 *	format_snat_static_map_to_resolve (u8 *s, va_list *args)
u8 *	format_det_map_ses (u8 *s, va_list *args)
int	snat_add_interface_address (snat_main_t *sm, u32 sw_if_index, int is_del, u8 twice_nat)
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_set_alloc_addr_and_port_mape (u16 psid, u16 psid_offset, u16 psid_length)
void	nat_set_alloc_addr_and_port_default (void)

Variables
snat_main_t	snat_main
vlib_node_registration_t	nat44_classify_node
	(constructor) VLIB_REGISTER_NODE (nat44_classify_node) More...
vlib_node_registration_t	nat44_det_classify_node
	(constructor) VLIB_REGISTER_NODE (nat44_det_classify_node) More...
vlib_node_registration_t	nat44_handoff_classify_node
	(constructor) VLIB_REGISTER_NODE (nat44_handoff_classify_node) More...

Enumeration Type Documentation

enum nat44_classify_next_t

Enumerator
NAT44_CLASSIFY_NEXT_IN2OUT
NAT44_CLASSIFY_NEXT_OUT2IN
NAT44_CLASSIFY_N_NEXT

Definition at line 137 of file nat.c.

Function Documentation

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

Definition at line 2765 of file nat.c.

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

Definition at line 2608 of file nat.c.

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

Definition at line 2255 of file nat.c.

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

Definition at line 2619 of file nat.c.

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

Definition at line 2591 of file nat.c.

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

Definition at line 2745 of file nat.c.

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

Definition at line 2709 of file nat.c.

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

Definition at line 2669 of file nat.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 int is_snat_address_used_in_static_mapping ( snat_main_t *  sm, ip4_address_t  addr  )

static

Definition at line 597 of file nat.c.

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static int lb_local_exists ( nat44_lb_addr_port_t *  local, ip4_address_t *  e_addr, u16  e_port  )

static

Definition at line 1114 of file nat.c.

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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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static uword nat44_classify_node_fn ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame  )

static

Definition at line 429 of file nat.c.

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static uword nat44_classify_node_fn_inline ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame  )

inlinestatic

Definition at line 346 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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static uword nat44_det_classify_node_fn ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame  )

static

Definition at line 452 of file nat.c.

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static uword nat44_handoff_classify_node_fn ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame  )

static

Definition at line 475 of file nat.c.

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static int nat_alloc_addr_and_port_default ( 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  )

static

Definition at line 2073 of file nat.c.

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static int nat_alloc_addr_and_port_mape ( 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  )

static

Definition at line 2165 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 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 2795 of file nat.c.

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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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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, snat_protocol_t  proto, int  addr_only, int  is_add, u8 *  tag  )

static

Definition at line 619 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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static clib_error_t* snat_config ( vlib_main_t *  vm, unformat_input_t *  input  )

static

Definition at line 2430 of file nat.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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static u32 snat_get_worker_in2out_cb ( ip4_header_t *  ip0, u32  rx_fib_index0  )

static

Definition at line 2274 of file nat.c.

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static u32 snat_get_worker_out2in_cb ( ip4_header_t *  ip0, u32  rx_fib_index0  )

static

Definition at line 2293 of file nat.c.

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static clib_error_t* snat_init ( vlib_main_t *  vm )

static

Definition at line 1831 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 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 2866 of file nat.c.

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static_always_inline u16 snat_random_port	(	u16	min,
		u16	max
	)

Definition at line 2049 of file nat.c.

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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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VLIB_NODE_FUNCTION_MULTIARCH	(	nat44_classify_node	,
		nat44_classify_node_fn
	)

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VLIB_NODE_FUNCTION_MULTIARCH	(	nat44_det_classify_node	,
		nat44_det_classify_node_fn
	)

VLIB_NODE_FUNCTION_MULTIARCH	(	nat44_handoff_classify_node	,
		nat44_handoff_classify_node_fn
	)

VLIB_PLUGIN_REGISTER

(

)

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_snat_det_in2out	,
		static
	)

VNET_FEATURE_INIT	(	ip4_snat_det_out2in	,
		static
	)

VNET_FEATURE_INIT	(	ip4_nat_det_classify	,
		static
	)

VNET_FEATURE_INIT	(	ip4_snat_in2out_worker_handoff	,
		static
	)

VNET_FEATURE_INIT	(	ip4_snat_out2in_worker_handoff	,
		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_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	(	ip4_nat_hairpinning	,
		static
	)

Variable Documentation

vlib_node_registration_t nat44_classify_node

Initial value:

= {
  .function = nat44_classify_node_fn,
  .name = "nat44-classify",
  .vector_size = sizeof (u32),
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_next_nodes = NAT44_CLASSIFY_N_NEXT,
  .next_nodes = {
    [NAT44_CLASSIFY_NEXT_IN2OUT] = "nat44-in2out",
    [NAT44_CLASSIFY_NEXT_OUT2IN] = "nat44-out2in",
  },
}

(constructor) VLIB_REGISTER_NODE (nat44_classify_node)

Definition at line 133 of file nat.c.

vlib_node_registration_t nat44_det_classify_node

Initial value:

= {
  .function = nat44_det_classify_node_fn,
  .name = "nat44-det-classify",
  .vector_size = sizeof (u32),
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_next_nodes = NAT44_CLASSIFY_N_NEXT,
  .next_nodes = {
    [NAT44_CLASSIFY_NEXT_IN2OUT] = "nat44-det-in2out",
    [NAT44_CLASSIFY_NEXT_OUT2IN] = "nat44-det-out2in",
  },
}

(constructor) VLIB_REGISTER_NODE (nat44_det_classify_node)

Definition at line 134 of file nat.c.

vlib_node_registration_t nat44_handoff_classify_node

Initial value:

= {
  .function = nat44_handoff_classify_node_fn,
  .name = "nat44-handoff-classify",
  .vector_size = sizeof (u32),
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_next_nodes = NAT44_CLASSIFY_N_NEXT,
  .next_nodes = {
    [NAT44_CLASSIFY_NEXT_IN2OUT] = "nat44-in2out-worker-handoff",
    [NAT44_CLASSIFY_NEXT_OUT2IN] = "nat44-out2in-worker-handoff",
  },
}

(constructor) VLIB_REGISTER_NODE (nat44_handoff_classify_node)

Definition at line 135 of file nat.c.

snat_main_t snat_main

Definition at line 35 of file nat.c.