nat64.c File Reference

NAT64 implementation. More...

Include dependency graph for nat64.c:

Go to the source code of this file.

Functions
	VNET_FEATURE_INIT (nat64_in2out, static)
	VNET_FEATURE_INIT (nat64_out2in, static)
	VNET_FEATURE_INIT (nat64_in2out_handoff, static)
	VNET_FEATURE_INIT (nat64_out2in_handoff, static)
static void	nat64_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)
u32	nat64_get_worker_in2out (ip6_address_t *addr)
	Get worker thread index for NAT64 in2out. More...
u32	nat64_get_worker_out2in (vlib_buffer_t *b, ip4_header_t *ip)
	Get worker thread index for NAT64 out2in. More...
clib_error_t *	nat64_init (vlib_main_t *vm)
	Initialize NAT64. More...
static void	nat64_free_out_addr_and_port (struct nat64_db_s *db, ip4_address_t *addr, u16 port, u8 protocol)
void	nat64_set_hash (u32 bib_buckets, uword bib_memory_size, u32 st_buckets, uword st_memory_size)
	Set NAT64 hash tables configuration. More...
int	nat64_add_del_pool_addr (u32 thread_index, ip4_address_t *addr, u32 vrf_id, u8 is_add)
	Add/delete address to NAT64 pool. More...
void	nat64_pool_addr_walk (nat64_pool_addr_walk_fn_t fn, void *ctx)
	Walk NAT64 pool. More...
int	nat64_add_interface_address (u32 sw_if_index, int is_add)
	NAT64 pool address from specific (DHCP addressed) interface. More...
static void	nat64_validate_counters (nat64_main_t *nm, u32 sw_if_index)
int	nat64_add_del_interface (u32 sw_if_index, u8 is_inside, u8 is_add)
	Enable/disable NAT64 feature on the interface. More...
void	nat64_interfaces_walk (nat64_interface_walk_fn_t fn, void *ctx)
	Walk NAT64 interfaces. More...
int	nat64_alloc_out_addr_and_port (u32 fib_index, nat_protocol_t proto, ip4_address_t *addr, u16 *port, u32 thread_index)
	Alloce IPv4 address and port pair from NAT64 pool. More...
static uword	nat64_static_bib_worker_fn (vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_frame_t *f)
	Add/delete static BIB entry in worker thread. More...
int	nat64_add_del_static_bib_entry (ip6_address_t *in_addr, ip4_address_t *out_addr, u16 in_port, u16 out_port, u8 proto, u32 vrf_id, u8 is_add)
	Add/delete static NAT64 BIB entry. More...
int	nat64_set_udp_timeout (u32 timeout)
	Set UDP session timeout. More...
u32	nat64_get_udp_timeout (void)
	Get UDP session timeout. More...
int	nat64_set_icmp_timeout (u32 timeout)
	Set ICMP session timeout. More...
u32	nat64_get_icmp_timeout (void)
	Get ICMP session timeout. More...
int	nat64_set_tcp_timeouts (u32 trans, u32 est)
	Set TCP session timeouts. More...
u32	nat64_get_tcp_trans_timeout (void)
	Get TCP transitory timeout. More...
u32	nat64_get_tcp_est_timeout (void)
	Get TCP established timeout. More...
void	nat64_session_reset_timeout (nat64_db_st_entry_t *ste, vlib_main_t *vm)
	Reset NAT64 session timeout. More...
void	nat64_tcp_session_set_state (nat64_db_st_entry_t *ste, tcp_header_t *tcp, u8 is_ip6)
	Set NAT64 TCP session state. More...
int	nat64_add_del_prefix (ip6_address_t *prefix, u8 plen, u32 vrf_id, u8 is_add)
	Add/delete NAT64 prefix. More...
void	nat64_prefix_walk (nat64_prefix_walk_fn_t fn, void *ctx)
	Walk NAT64 prefixes. More...
void	nat64_compose_ip6 (ip6_address_t *ip6, ip4_address_t *ip4, u32 fib_index)
	Compose IPv4-embedded IPv6 addresses. More...
void	nat64_extract_ip4 (ip6_address_t *ip6, ip4_address_t *ip4, u32 fib_index)
	Extract IPv4 address from the IPv4-embedded IPv6 addresses. More...
static uword	nat64_expire_worker_walk_fn (vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_frame_t *f)
	Per worker process checking expire time for NAT64 sessions. More...
static uword	nat64_expire_walk_fn (vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_frame_t *f)
	Centralized process to drive per worker expire walk. More...

Variables
nat64_main_t	nat64_main
static u8	well_known_prefix []
static vlib_node_registration_t	nat64_static_bib_worker_node
	(constructor) VLIB_REGISTER_NODE (nat64_static_bib_worker_node) More...
static vlib_node_registration_t	nat64_expire_worker_walk_node
	(constructor) VLIB_REGISTER_NODE (nat64_expire_worker_walk_node) More...
static vlib_node_registration_t	nat64_expire_walk_node
	(constructor) VLIB_REGISTER_NODE (nat64_expire_walk_node) More...

Detailed Description

NAT64 implementation.

Definition in file nat64.c.

Function Documentation

nat64_add_del_interface()

int nat64_add_del_interface	(	u32	sw_if_index,
		u8	is_inside,
		u8	is_add
	)

Enable/disable NAT64 feature on the interface.

Parameters

sw_if_index	Index of the interface.
is_inside	1 if inside, 0 if outside.
is_add	1 if add, 0 if delete.

Returns

0 on success, non-zero value otherwise.

Definition at line 433 of file nat64.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat64_add_del_pool_addr()

int nat64_add_del_pool_addr	(	u32	thread_index,
		ip4_address_t *	addr,
		u32	vrf_id,
		u8	is_add
	)

Add/delete address to NAT64 pool.

Parameters

thread_index	Thread index used by ipfix nat logging (not address per thread).
addr	IPv4 address.
vrf_id	VRF id of tenant, ~0 means independent of VRF.
is_add	1 if add, 0 if delete.

Returns

0 on success, non-zero value otherwise.

Definition at line 288 of file nat64.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat64_add_del_prefix()

int nat64_add_del_prefix	(	ip6_address_t *	prefix,
		u8	plen,
		u32	vrf_id,
		u8	is_add
	)

Add/delete NAT64 prefix.

Parameters

prefix	NAT64 prefix.
plen	Prefix length.
vrf_id	VRF id of tenant.
is_add	1 if add, 0 if delete.

Returns

0 on success, non-zero value otherwise.

Definition at line 986 of file nat64.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat64_add_del_static_bib_entry()

int nat64_add_del_static_bib_entry	(	ip6_address_t *	in_addr,
		ip4_address_t *	out_addr,
		u16	in_port,
		u16	out_port,
		u8	proto,
		u32	vrf_id,
		u8	is_add
	)

Add/delete static NAT64 BIB entry.

Parameters

in_addr	Inside IPv6 address.
out_addr	Outside IPv4 address.
in_port	Inside port number.
out_port	Outside port number.
proto	L4 protocol.
vrf_id	VRF id of tenant.
is_add	1 if add, 0 if delete.

Returns

0 on success, non-zero value otherwise.

Definition at line 670 of file nat64.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat64_add_interface_address()

int nat64_add_interface_address	(	u32	sw_if_index,
		int	is_add
	)

NAT64 pool address from specific (DHCP addressed) interface.

Parameters

sw_if_index	Index of the interface.
is_add	1 if add, 0 if delete.

Returns

0 on success, non-zero value otherwise.

Definition at line 379 of file nat64.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat64_alloc_out_addr_and_port()

int nat64_alloc_out_addr_and_port	(	u32	fib_index,
		nat_protocol_t	proto,
		ip4_address_t *	addr,
		u16 *	port,
		u32	thread_index
	)

Alloce IPv4 address and port pair from NAT64 pool.

Parameters

fib_index	FIB index of tenant.
proto	L4 protocol.
addr	Allocated IPv4 address.
port	Allocated port number.
thread_index	Thread index.

Returns

0 on success, non-zero value otherwise.

Definition at line 547 of file nat64.c.

Here is the caller graph for this function:

nat64_compose_ip6()

void nat64_compose_ip6	(	ip6_address_t *	ip6,
		ip4_address_t *	ip4,
		u32	fib_index
	)

Compose IPv4-embedded IPv6 addresses.

Parameters

ip6	IPv4-embedded IPv6 addresses.
ip4	IPv4 address.
fib_index	Tenant FIB index.

Definition at line 1049 of file nat64.c.

Here is the caller graph for this function:

nat64_expire_walk_fn()

static uword nat64_expire_walk_fn ( vlib_main_t *  vm, vlib_node_runtime_t *  rt, vlib_frame_t *  f  )

static

Centralized process to drive per worker expire walk.

Definition at line 1223 of file nat64.c.

Here is the call graph for this function:

nat64_expire_worker_walk_fn()

static uword nat64_expire_worker_walk_fn ( vlib_main_t *  vm, vlib_node_runtime_t *  rt, vlib_frame_t *  f  )

static

Per worker process checking expire time for NAT64 sessions.

Definition at line 1189 of file nat64.c.

Here is the call graph for this function:

nat64_extract_ip4()

void nat64_extract_ip4	(	ip6_address_t *	ip6,
		ip4_address_t *	ip4,
		u32	fib_index
	)

Extract IPv4 address from the IPv4-embedded IPv6 addresses.

Parameters

ip6	IPv4-embedded IPv6 addresses.
ip4	IPv4 address.
fib_index	Tenant FIB index.

Definition at line 1119 of file nat64.c.

Here is the caller graph for this function:

nat64_free_out_addr_and_port()

static void nat64_free_out_addr_and_port ( struct nat64_db_s *  db, ip4_address_t *  addr, u16  port, u8  protocol  )

static

Definition at line 568 of file nat64.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat64_get_icmp_timeout()

u32 nat64_get_icmp_timeout

(

void

)

Get ICMP session timeout.

Returns

ICMP session timeout in seconds.

Definition at line 838 of file nat64.c.

nat64_get_tcp_est_timeout()

u32 nat64_get_tcp_est_timeout

(

void

)

Get TCP established timeout.

Returns

TCP established timeout in seconds.

Definition at line 872 of file nat64.c.

nat64_get_tcp_trans_timeout()

u32 nat64_get_tcp_trans_timeout

(

void

)

Get TCP transitory timeout.

Returns

TCP transitory timeout in seconds.

Definition at line 864 of file nat64.c.

nat64_get_udp_timeout()

u32 nat64_get_udp_timeout

(

void

)

Get UDP session timeout.

Returns

UDP session timeout in seconds.

Definition at line 817 of file nat64.c.

nat64_get_worker_in2out()

u32 nat64_get_worker_in2out

(

ip6_address_t *

addr

)

Get worker thread index for NAT64 in2out.

Parameters

addr	IPv6 src address.

Returns

worker thread index.

Definition at line 105 of file nat64.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat64_get_worker_out2in()

u32 nat64_get_worker_out2in	(	vlib_buffer_t *	b,
		ip4_header_t *	ip
	)

Get worker thread index for NAT64 out2in.

Parameters

ip	IPv4 header.

Returns

worker thread index.

Definition at line 128 of file nat64.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat64_init()

clib_error_t* nat64_init

(

vlib_main_t *

vm

)

Initialize NAT64.

Parameters

vm	vlib main.

Returns

error code.

Definition at line 201 of file nat64.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat64_interfaces_walk()

void nat64_interfaces_walk	(	nat64_interface_walk_fn_t	fn,
		void *	ctx
	)

Walk NAT64 interfaces.

Parameters

fn	The function to invoke on each entry visited.
ctx	A context passed in the visit function.

Definition at line 532 of file nat64.c.

Here is the caller graph for this function:

nat64_ip4_add_del_interface_address_cb()

static void nat64_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 70 of file nat64.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat64_pool_addr_walk()

void nat64_pool_addr_walk	(	nat64_pool_addr_walk_fn_t	fn,
		void *	ctx
	)

Walk NAT64 pool.

Parameters

fn	The function to invoke on each entry visited.
ctx	A context passed in the visit function.

Definition at line 364 of file nat64.c.

Here is the caller graph for this function:

nat64_prefix_walk()

void nat64_prefix_walk	(	nat64_prefix_walk_fn_t	fn,
		void *	ctx
	)

Walk NAT64 prefixes.

Parameters

fn	The function to invoke on each entry visited.
ctx	A context passed in the visit function.

Definition at line 1034 of file nat64.c.

Here is the caller graph for this function:

nat64_session_reset_timeout()

void nat64_session_reset_timeout	(	nat64_db_st_entry_t *	ste,
		vlib_main_t *	vm
	)

Reset NAT64 session timeout.

Parameters

ste	Session table entry.
vm	VLIB main.

Definition at line 880 of file nat64.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat64_set_hash()

void nat64_set_hash	(	u32	bib_buckets,
		uword	bib_memory_size,
		u32	st_buckets,
		uword	st_memory_size
	)

Set NAT64 hash tables configuration.

Parameters

bib_buckets	Number of BIB hash buckets.
bib_memory_size	Memory size of BIB hash.
st_buckets	Number of session table hash buckets.
st_memory_size	Memory size of session table hash.

Definition at line 266 of file nat64.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat64_set_icmp_timeout()

int nat64_set_icmp_timeout

(

u32

timeout

)

Set ICMP session timeout.

Parameters

timeout

Timeout value in seconds (if 0 reset to default value 60sec).

Returns

0 on success, non-zero value otherwise.

Definition at line 825 of file nat64.c.

Here is the caller graph for this function:

nat64_set_tcp_timeouts()

int nat64_set_tcp_timeouts	(	u32	trans,
		u32	est
	)

Set TCP session timeouts.

Parameters

trans	Transitory timeout in seconds (if 0 reset to default value 240sec).
est	Established timeout in seconds (if 0 reset to default value 7440sec).

Returns

0 on success, non-zero value otherwise.

Definition at line 846 of file nat64.c.

Here is the caller graph for this function:

nat64_set_udp_timeout()

int nat64_set_udp_timeout

(

u32

timeout

)

Set UDP session timeout.

Parameters

timeout

Timeout value in seconds (if 0 reset to default value 300sec).

Returns

0 on success, non-zero value otherwise.

Definition at line 804 of file nat64.c.

Here is the caller graph for this function:

nat64_static_bib_worker_fn()

static uword nat64_static_bib_worker_fn ( vlib_main_t *  vm, vlib_node_runtime_t *  rt, vlib_frame_t *  f  )

static

Add/delete static BIB entry in worker thread.

Definition at line 606 of file nat64.c.

nat64_tcp_session_set_state()

void nat64_tcp_session_set_state	(	nat64_db_st_entry_t *	ste,
		tcp_header_t *	tcp,
		u8	is_ip6
	)

Set NAT64 TCP session state.

Parameters

ste	Session table entry.
tcp	TCP header.
is_ip6	1 if IPv6 packet, 0 if IPv4.

Definition at line 919 of file nat64.c.

Here is the caller graph for this function:

nat64_validate_counters()

static void nat64_validate_counters ( nat64_main_t *  nm, u32  sw_if_index  )

static

Definition at line 421 of file nat64.c.

VNET_FEATURE_INIT() [1/4]

VNET_FEATURE_INIT	(	nat64_in2out	,
		static
	)

VNET_FEATURE_INIT() [2/4]

VNET_FEATURE_INIT	(	nat64_out2in	,
		static
	)

VNET_FEATURE_INIT() [3/4]

VNET_FEATURE_INIT	(	nat64_in2out_handoff	,
		static
	)

VNET_FEATURE_INIT() [4/4]

VNET_FEATURE_INIT	(	nat64_out2in_handoff	,
		static
	)

Variable Documentation

nat64_expire_walk_node

static vlib_node_registration_t nat64_expire_walk_node

static

Initial value:

= {
    .function = nat64_expire_walk_fn,
    .type = VLIB_NODE_TYPE_PROCESS,
    .name = "nat64-expire-walk",
}

(constructor) VLIB_REGISTER_NODE (nat64_expire_walk_node)

Definition at line 1217 of file nat64.c.

nat64_expire_worker_walk_node

static vlib_node_registration_t nat64_expire_worker_walk_node

static

Initial value:

= {
    .function = nat64_expire_worker_walk_fn,
    .type = VLIB_NODE_TYPE_INPUT,
    .state = VLIB_NODE_STATE_INTERRUPT,
    .name = "nat64-expire-worker-walk",
}

(constructor) VLIB_REGISTER_NODE (nat64_expire_worker_walk_node)

Definition at line 1206 of file nat64.c.

nat64_main

nat64_main_t nat64_main

Definition at line 29 of file nat64.c.

nat64_static_bib_worker_node

static vlib_node_registration_t nat64_static_bib_worker_node

static

Initial value:

= {
    .function = nat64_static_bib_worker_fn,
    .type = VLIB_NODE_TYPE_INPUT,
    .state = VLIB_NODE_STATE_INTERRUPT,
    .name = "nat64-static-bib-worker",
}

(constructor) VLIB_REGISTER_NODE (nat64_static_bib_worker_node)

Definition at line 658 of file nat64.c.

well_known_prefix

u8 well_known_prefix[]

static

Initial value:

= {
  0x00, 0x64, 0xff, 0x9b,
  0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00
}

Definition at line 60 of file nat64.c.