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Vector Packet Processing
nat64.c File Reference

NAT64 implementation. More...

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Functions

 VNET_FEATURE_INIT (nat64_in2out, static)
 
 VNET_FEATURE_INIT (nat64_out2in, static)
 
clib_error_tnat64_init (vlib_main_t *vm)
 Initialize NAT64. More...
 
int nat64_add_del_pool_addr (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_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)
 Alloce IPv4 address and port pair from NAT64 pool. More...
 
void nat64_free_out_addr_and_port (ip4_address_t *addr, u16 port, snat_protocol_t proto)
 Free IPv4 address and port pair from NAT64 pool. 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, u32 incoming_syn)
 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...
 
u32 nat64_get_tcp_incoming_syn_timeout (void)
 Get TCP incoming SYN 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_walk_fn (vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_frame_t *f)
 The 'nat64-expire-walk' process's main loop. More...
 

Variables

nat64_main_t nat64_main
 
static u8 well_known_prefix []
 
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 159 of file nat64.c.

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

Add/delete address to NAT64 pool.

Parameters
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 83 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 611 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 345 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 
)

Alloce IPv4 address and port pair from NAT64 pool.

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

Definition at line 227 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 673 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

The 'nat64-expire-walk' process's main loop.

Check expire time for NAT64 sessions.

Definition at line 819 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 744 of file nat64.c.

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void nat64_free_out_addr_and_port ( ip4_address_t addr,
u16  port,
snat_protocol_t  proto 
)

Free IPv4 address and port pair from NAT64 pool.

Parameters
addrIPv4 address to free.
portPort number to free.
protoL4 protocol.
Returns
0 on success, non-zero value otherwise.

Definition at line 313 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 451 of file nat64.c.

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u32 nat64_get_tcp_est_timeout ( void  )

Get TCP established timeout.

Returns
TCP established timeout in seconds.

Definition at line 490 of file nat64.c.

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u32 nat64_get_tcp_incoming_syn_timeout ( void  )

Get TCP incoming SYN timeout.

Returns
TCP incoming SYN timeout in seconds.

Definition at line 498 of file nat64.c.

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u32 nat64_get_tcp_trans_timeout ( void  )

Get TCP transitory timeout.

Returns
TCP transitory timeout in seconds.

Definition at line 482 of file nat64.c.

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u32 nat64_get_udp_timeout ( void  )

Get UDP session timeout.

Returns
UDP session timeout in seconds.

Definition at line 430 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 51 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 212 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 144 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 658 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 506 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 438 of file nat64.c.

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int nat64_set_tcp_timeouts ( u32  trans,
u32  est,
u32  incoming_syn 
)

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).
incoming_synIncoming SYN timeout in seconds (if 0 reset to default value 6sec).
Returns
0 on success, non-zero value otherwise.

Definition at line 459 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 415 of file nat64.c.

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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 544 of file nat64.c.

VNET_FEATURE_INIT ( nat64_in2out  ,
static   
)
VNET_FEATURE_INIT ( nat64_out2in  ,
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)
The 'nat64-expire-walk' process's main loop.
Definition: nat64.c:819

(constructor) VLIB_REGISTER_NODE (nat64_expire_walk_node)

Definition at line 836 of file nat64.c.

nat64_main_t nat64_main

Definition at line 25 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 41 of file nat64.c.