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Vector Packet Processing
nat64.c File Reference

NAT64 implementation. More...

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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 (ip4_header_t *ip)
 Get worker thread index for NAT64 out2in. More...
 
clib_error_tnat64_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, u32 bib_memory_size, u32 st_buckets, u32 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...
 
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, snat_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

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_indexIndex of the interface.
is_inside1 if inside, 0 if outside.
is_add1 if add, 0 if delete.
Returns
0 on success, non-zero value otherwise.

Definition at line 453 of file nat64.c.

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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_indexThread index used by ipfix nat logging (not address per thread).
addrIPv4 address.
vrf_idVRF id of tenant, ~0 means independent of VRF.
is_add1 if add, 0 if delete.
Returns
0 on success, non-zero value otherwise.

Definition at line 315 of file nat64.c.

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

Add/delete NAT64 prefix.

Parameters
prefixNAT64 prefix.
plenPrefix length.
vrf_idVRF id of tenant.
is_add1 if add, 0 if delete.
Returns
0 on success, non-zero value otherwise.

Definition at line 1002 of file nat64.c.

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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_addrInside IPv6 address.
out_addrOutside IPv4 address.
in_portInside port number.
out_portOutside port number.
protoL4 protocol.
vrf_idVRF id of tenant.
is_add1 if add, 0 if delete.
Returns
0 on success, non-zero value otherwise.

Definition at line 684 of file nat64.c.

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int nat64_add_interface_address ( u32  sw_if_index,
int  is_add 
)

NAT64 pool address from specific (DHCP addressed) interface.

Parameters
sw_if_indexIndex of the interface.
is_add1 if add, 0 if delete.
Returns
0 on success, non-zero value otherwise.

Definition at line 411 of file nat64.c.

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

Alloce IPv4 address and port pair from NAT64 pool.

Parameters
fib_indexFIB index of tenant.
protoL4 protocol.
addrAllocated IPv4 address.
portAllocated port number.
thread_indexThread index.
Returns
0 on success, non-zero value otherwise.

Definition at line 552 of file nat64.c.

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

Compose IPv4-embedded IPv6 addresses.

Parameters
ip6IPv4-embedded IPv6 addresses.
ip4IPv4 address.
fib_indexTenant FIB index.

Definition at line 1065 of file nat64.c.

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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 1239 of file nat64.c.

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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 1205 of file nat64.c.

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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
ip6IPv4-embedded IPv6 addresses.
ip4IPv4 address.
fib_indexTenant FIB index.

Definition at line 1135 of file nat64.c.

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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 581 of file nat64.c.

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u32 nat64_get_icmp_timeout ( void  )

Get ICMP session timeout.

Returns
ICMP session timeout in seconds.

Definition at line 854 of file nat64.c.

u32 nat64_get_tcp_est_timeout ( void  )

Get TCP established timeout.

Returns
TCP established timeout in seconds.

Definition at line 888 of file nat64.c.

u32 nat64_get_tcp_trans_timeout ( void  )

Get TCP transitory timeout.

Returns
TCP transitory timeout in seconds.

Definition at line 880 of file nat64.c.

u32 nat64_get_udp_timeout ( void  )

Get UDP session timeout.

Returns
UDP session timeout in seconds.

Definition at line 833 of file nat64.c.

u32 nat64_get_worker_in2out ( ip6_address_t addr)

Get worker thread index for NAT64 in2out.

Parameters
addrIPv6 src address.
Returns
worker thread index.

Definition at line 100 of file nat64.c.

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u32 nat64_get_worker_out2in ( ip4_header_t ip)

Get worker thread index for NAT64 out2in.

Parameters
ipIPv4 header.
Returns
worker thread index.

Definition at line 123 of file nat64.c.

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clib_error_t* nat64_init ( vlib_main_t vm)

Initialize NAT64.

Parameters
vmvlib main.
Returns
error code.

Definition at line 229 of file nat64.c.

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void nat64_interfaces_walk ( nat64_interface_walk_fn_t  fn,
void *  ctx 
)

Walk NAT64 interfaces.

Parameters
fnThe function to invoke on each entry visited.
ctxA context passed in the visit function.

Definition at line 537 of file nat64.c.

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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 65 of file nat64.c.

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void nat64_pool_addr_walk ( nat64_pool_addr_walk_fn_t  fn,
void *  ctx 
)

Walk NAT64 pool.

Parameters
fnThe function to invoke on each entry visited.
ctxA context passed in the visit function.

Definition at line 396 of file nat64.c.

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void nat64_prefix_walk ( nat64_prefix_walk_fn_t  fn,
void *  ctx 
)

Walk NAT64 prefixes.

Parameters
fnThe function to invoke on each entry visited.
ctxA context passed in the visit function.

Definition at line 1050 of file nat64.c.

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void nat64_session_reset_timeout ( nat64_db_st_entry_t *  ste,
vlib_main_t vm 
)

Reset NAT64 session timeout.

Parameters
steSession table entry.
vmVLIB main.

Definition at line 896 of file nat64.c.

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

Set NAT64 hash tables configuration.

Parameters
bib_bucketsNumber of BIB hash buckets.
bib_memory_sizeMemory size of BIB hash.
st_bucketsNumber of session table hash buckets.
st_memory_sizeMemory size of session table hash.

Definition at line 293 of file nat64.c.

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int nat64_set_icmp_timeout ( u32  timeout)

Set ICMP session timeout.

Parameters
timeoutTimeout value in seconds (if 0 reset to default value 60sec).
Returns
0 on success, non-zero value otherwise.

Definition at line 841 of file nat64.c.

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int nat64_set_tcp_timeouts ( u32  trans,
u32  est 
)

Set TCP session timeouts.

Parameters
transTransitory timeout in seconds (if 0 reset to default value 240sec).
estEstablished timeout in seconds (if 0 reset to default value 7440sec).
Returns
0 on success, non-zero value otherwise.

Definition at line 862 of file nat64.c.

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int nat64_set_udp_timeout ( u32  timeout)

Set UDP session timeout.

Parameters
timeoutTimeout value in seconds (if 0 reset to default value 300sec).
Returns
0 on success, non-zero value otherwise.

Definition at line 820 of file nat64.c.

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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 620 of file nat64.c.

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
steSession table entry.
tcpTCP header.
is_ip61 if IPv6 packet, 0 if IPv4.

Definition at line 935 of file nat64.c.

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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   
)

Variable Documentation

static vlib_node_registration_t nat64_expire_walk_node
static
Initial value:
= {
.function = nat64_expire_walk_fn,
.name = "nat64-expire-walk",
}
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.
Definition: nat64.c:1239

(constructor) VLIB_REGISTER_NODE (nat64_expire_walk_node)

Definition at line 1233 of file nat64.c.

static vlib_node_registration_t nat64_expire_worker_walk_node
static
Initial value:
= {
.state = VLIB_NODE_STATE_INTERRUPT,
.name = "nat64-expire-worker-walk",
}
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.
Definition: nat64.c:1205

(constructor) VLIB_REGISTER_NODE (nat64_expire_worker_walk_node)

Definition at line 1222 of file nat64.c.

nat64_main_t nat64_main

Definition at line 28 of file nat64.c.

static vlib_node_registration_t nat64_static_bib_worker_node
static
Initial value:
= {
.state = VLIB_NODE_STATE_INTERRUPT,
.name = "nat64-static-bib-worker",
}
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.
Definition: nat64.c:620

(constructor) VLIB_REGISTER_NODE (nat64_static_bib_worker_node)

Definition at line 672 of file nat64.c.

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 55 of file nat64.c.