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Vector Packet Processing
out2in.c File Reference

NAT44 endpoint-dependent outside to inside network translation. More...

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Data Structures

struct  snat_out2in_trace_t
 

Macros

#define foreach_snat_out2in_error
 

Enumerations

enum  snat_out2in_error_t { SNAT_OUT2IN_N_ERROR }
 
enum  snat_out2in_next_t { SNAT_OUT2IN_NEXT_DROP, SNAT_OUT2IN_NEXT_LOOKUP, SNAT_OUT2IN_NEXT_ICMP_ERROR, SNAT_OUT2IN_N_NEXT }
 

Functions

static u8format_snat_out2in_trace (u8 *s, va_list *args)
 
static u8format_snat_out2in_fast_trace (u8 *s, va_list *args)
 
int nat44_o2i_is_idle_session_cb (clib_bihash_kv_8_8_t *kv, void *arg)
 
static snat_session_t * create_session_for_static_mapping (snat_main_t *sm, vlib_buffer_t *b0, ip4_address_t i2o_addr, u16 i2o_port, u32 i2o_fib_index, ip4_address_t o2i_addr, u16 o2i_port, u32 o2i_fib_index, nat_protocol_t proto, vlib_node_runtime_t *node, u32 thread_index, f64 now)
 Create session for static mapping. More...
 
static_always_inline snat_out2in_error_t icmp_get_key (vlib_buffer_t *b, ip4_header_t *ip0, ip4_address_t *addr, u16 *port, nat_protocol_t *nat_proto)
 
u32 icmp_match_out2in_slow (snat_main_t *sm, vlib_node_runtime_t *node, u32 thread_index, vlib_buffer_t *b0, ip4_header_t *ip0, ip4_address_t *addr, u16 *port, u32 *fib_index, nat_protocol_t *proto, void *d, void *e, u8 *dont_translate)
 Get address and port values to be used for ICMP packet translation and create session if needed. More...
 
u32 icmp_match_out2in_fast (snat_main_t *sm, vlib_node_runtime_t *node, u32 thread_index, vlib_buffer_t *b0, ip4_header_t *ip0, ip4_address_t *mapping_addr, u16 *mapping_port, u32 *mapping_fib_index, nat_protocol_t *proto, void *d, void *e, u8 *dont_translate)
 Get address and port values to be used for ICMP packet translation. More...
 
u32 icmp_out2in (snat_main_t *sm, vlib_buffer_t *b0, ip4_header_t *ip0, icmp46_header_t *icmp0, u32 sw_if_index0, u32 rx_fib_index0, vlib_node_runtime_t *node, u32 next0, u32 thread_index, void *d, void *e)
 
static u32 icmp_out2in_slow_path (snat_main_t *sm, vlib_buffer_t *b0, ip4_header_t *ip0, icmp46_header_t *icmp0, u32 sw_if_index0, u32 rx_fib_index0, vlib_node_runtime_t *node, u32 next0, f64 now, u32 thread_index, snat_session_t **p_s0)
 
static int nat_out2in_sm_unknown_proto (snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip, u32 rx_fib_index)
 
VLIB_NODE_FN() snat_out2in_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
 
VLIB_NODE_FN() snat_out2in_fast_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
 

Variables

static char * snat_out2in_error_strings []
 
vlib_node_registration_t snat_out2in_node
 (constructor) VLIB_REGISTER_NODE (snat_out2in_node) More...
 
vlib_node_registration_t snat_out2in_fast_node
 (constructor) VLIB_REGISTER_NODE (snat_out2in_fast_node) More...
 

Detailed Description

NAT44 endpoint-dependent outside to inside network translation.

Definition in file out2in.c.

Macro Definition Documentation

◆ foreach_snat_out2in_error

#define foreach_snat_out2in_error
Value:
_(UNSUPPORTED_PROTOCOL, "unsupported protocol") \
_(OUT_OF_PORTS, "out of ports") \
_(BAD_ICMP_TYPE, "unsupported ICMP type") \
_(NO_TRANSLATION, "no translation") \
_(MAX_SESSIONS_EXCEEDED, "maximum sessions exceeded") \
_(CANNOT_CREATE_USER, "cannot create NAT user")

Definition at line 73 of file out2in.c.

Enumeration Type Documentation

◆ snat_out2in_error_t

Enumerator
SNAT_OUT2IN_N_ERROR 

Definition at line 81 of file out2in.c.

◆ snat_out2in_next_t

Enumerator
SNAT_OUT2IN_NEXT_DROP 
SNAT_OUT2IN_NEXT_LOOKUP 
SNAT_OUT2IN_NEXT_ICMP_ERROR 
SNAT_OUT2IN_N_NEXT 

Definition at line 95 of file out2in.c.

Function Documentation

◆ create_session_for_static_mapping()

static snat_session_t* create_session_for_static_mapping ( snat_main_t sm,
vlib_buffer_t b0,
ip4_address_t  i2o_addr,
u16  i2o_port,
u32  i2o_fib_index,
ip4_address_t  o2i_addr,
u16  o2i_port,
u32  o2i_fib_index,
nat_protocol_t  proto,
vlib_node_runtime_t node,
u32  thread_index,
f64  now 
)
inlinestatic

Create session for static mapping.

Create NAT session initiated by host from external network with static mapping.

Parameters
smNAT main.
b0Vlib buffer.
in2outIn2out NAT44 session key.
out2inOut2in NAT44 session key.
nodeVlib node.
Returns
SNAT session if successfully created otherwise 0.

Definition at line 167 of file out2in.c.

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◆ format_snat_out2in_fast_trace()

static u8* format_snat_out2in_fast_trace ( u8 s,
va_list *  args 
)
static

Definition at line 62 of file out2in.c.

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◆ format_snat_out2in_trace()

static u8* format_snat_out2in_trace ( u8 s,
va_list *  args 
)
static

Definition at line 48 of file out2in.c.

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◆ icmp_get_key()

static_always_inline snat_out2in_error_t icmp_get_key ( vlib_buffer_t b,
ip4_header_t ip0,
ip4_address_t addr,
u16 port,
nat_protocol_t nat_proto 
)

Definition at line 260 of file out2in.c.

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◆ icmp_match_out2in_fast()

u32 icmp_match_out2in_fast ( snat_main_t sm,
vlib_node_runtime_t node,
u32  thread_index,
vlib_buffer_t b0,
ip4_header_t ip0,
ip4_address_t mapping_addr,
u16 mapping_port,
u32 mapping_fib_index,
nat_protocol_t proto,
void *  d,
void *  e,
u8 dont_translate 
)

Get address and port values to be used for ICMP packet translation.

Parameters
[in]smNAT main
[in,out]nodeNAT node runtime
[in]thread_indexthread index
[in,out]b0buffer containing packet to be translated
[in,out]ip0ip header
[out]p_protoprotocol used for matching
[out]p_valueaddress and port after NAT translation
[out]p_dont_translateif packet should not be translated
doptional parameter
eoptional parameter

Definition at line 460 of file out2in.c.

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◆ icmp_match_out2in_slow()

u32 icmp_match_out2in_slow ( snat_main_t sm,
vlib_node_runtime_t node,
u32  thread_index,
vlib_buffer_t b0,
ip4_header_t ip0,
ip4_address_t addr,
u16 port,
u32 fib_index,
nat_protocol_t proto,
void *  d,
void *  e,
u8 dont_translate 
)

Get address and port values to be used for ICMP packet translation and create session if needed.

Parameters
[in,out]smNAT main
[in,out]nodeNAT node runtime
[in]thread_indexthread index
[in,out]b0buffer containing packet to be translated
[in,out]ip0ip header
[out]p_protoprotocol used for matching
[out]p_valueaddress and port after NAT translation
[out]p_dont_translateif packet should not be translated
doptional parameter
eoptional parameter

Definition at line 319 of file out2in.c.

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◆ icmp_out2in()

u32 icmp_out2in ( snat_main_t sm,
vlib_buffer_t b0,
ip4_header_t ip0,
icmp46_header_t *  icmp0,
u32  sw_if_index0,
u32  rx_fib_index0,
vlib_node_runtime_t node,
u32  next0,
u32  thread_index,
void *  d,
void *  e 
)

Definition at line 520 of file out2in.c.

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◆ icmp_out2in_slow_path()

static u32 icmp_out2in_slow_path ( snat_main_t sm,
vlib_buffer_t b0,
ip4_header_t ip0,
icmp46_header_t *  icmp0,
u32  sw_if_index0,
u32  rx_fib_index0,
vlib_node_runtime_t node,
u32  next0,
f64  now,
u32  thread_index,
snat_session_t **  p_s0 
)
inlinestatic

Definition at line 661 of file out2in.c.

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◆ nat44_o2i_is_idle_session_cb()

int nat44_o2i_is_idle_session_cb ( clib_bihash_kv_8_8_t kv,
void *  arg 
)

Definition at line 105 of file out2in.c.

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◆ nat_out2in_sm_unknown_proto()

static int nat_out2in_sm_unknown_proto ( snat_main_t sm,
vlib_buffer_t b,
ip4_header_t ip,
u32  rx_fib_index 
)
static

Definition at line 689 of file out2in.c.

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◆ snat_out2in_fast_node()

VLIB_NODE_FN() snat_out2in_fast_node ( vlib_main_t vm,
vlib_node_runtime_t node,
vlib_frame_t frame 
)

Definition at line 1397 of file out2in.c.

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◆ snat_out2in_node()

VLIB_NODE_FN() snat_out2in_node ( vlib_main_t vm,
vlib_node_runtime_t node,
vlib_frame_t frame 
)

Definition at line 714 of file out2in.c.

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Variable Documentation

◆ snat_out2in_error_strings

char* snat_out2in_error_strings[]
static
Initial value:
= {
#define _(sym,string)
}
#define foreach_snat_out2in_error
Definition: out2in.c:73

Definition at line 89 of file out2in.c.

◆ snat_out2in_fast_node

vlib_node_registration_t snat_out2in_fast_node
Initial value:
= {
.name = "nat44-out2in-fast",
.vector_size = sizeof (u32),
.error_strings = snat_out2in_error_strings,
.runtime_data_bytes = sizeof (snat_runtime_t),
.n_next_nodes = SNAT_OUT2IN_N_NEXT,
.next_nodes = {
[SNAT_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
[SNAT_OUT2IN_NEXT_DROP] = "error-drop",
[SNAT_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
},
}
static u8 * format_snat_out2in_fast_trace(u8 *s, va_list *args)
Definition: out2in.c:62
unsigned int u32
Definition: types.h:88
vl_api_fib_path_type_t type
Definition: fib_types.api:123
#define ARRAY_LEN(x)
Definition: clib.h:67
static char * snat_out2in_error_strings[]
Definition: out2in.c:89

(constructor) VLIB_REGISTER_NODE (snat_out2in_fast_node)

Definition at line 1558 of file out2in.c.

◆ snat_out2in_node

vlib_node_registration_t snat_out2in_node
Initial value:
= {
.name = "nat44-out2in",
.vector_size = sizeof (u32),
.format_trace = format_snat_out2in_trace,
.error_strings = snat_out2in_error_strings,
.runtime_data_bytes = sizeof (snat_runtime_t),
.n_next_nodes = SNAT_OUT2IN_N_NEXT,
.next_nodes = {
[SNAT_OUT2IN_NEXT_DROP] = "error-drop",
[SNAT_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
[SNAT_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
},
}
unsigned int u32
Definition: types.h:88
vl_api_fib_path_type_t type
Definition: fib_types.api:123
#define ARRAY_LEN(x)
Definition: clib.h:67
static char * snat_out2in_error_strings[]
Definition: out2in.c:89
static u8 * format_snat_out2in_trace(u8 *s, va_list *args)
Definition: out2in.c:48

(constructor) VLIB_REGISTER_NODE (snat_out2in_node)

Definition at line 1375 of file out2in.c.